Impact on health editor of sodium molybdate plate

Eyes : Eye irritation causes.
Skin : Skin irritation.
Ingestion : May cause nausea , vomiting and diarrhea and other gastrointestinal irritation. This substance
Toxicological properties have not been fully investigated .
Inhalation : May cause respiratory tract irritation .
Chronic: No information .
First aid measures
Eyes: with plenty of water for at least 15 minutes , immediately flush eyes occasionally lift up and down
Eyelids . Seek medical assistance.
Skin : Get medical aid. Rinse skin with plenty of water for at least 15 minutes and off decontamination
Stained clothes and shoes. Wash clothing before reuse .
Ingestion: Never give anything by mouth to an unconscious person . Seek medical assistance. Do not induce vomiting . As
If awake and alert , rinse , drink milk or water 2-4 cupfuls.
Inhalation: from exposure and move to fresh air immediately . If not breathing , give artificial
Breathing. If breathing is difficult , give oxygen. Seek medical assistance.
Notes to physician : Symptoms active treatment.
Physical and chemical properties of sodium Kekai molybdate
Sodium molybdate Physical state : Solid
Sodium molybdate Appearance : White
Sodium molybdate density: 3.28
Molecular sodium molybdenum rod : Na2MoO4 · 2H2O
The molecular weight of sodium molybdate : 241.944
Stability and reactivity of sodium molybdate
Sodium molybdenum plate chemical stability : stable at normal storage in a closed container at room temperature
And conditional processing .
Conditions to Avoid : Incompatible materials , dust , excess heat.
Incompatibility with other materials : Strong oxidizers.
Dangerous decomposition products : irritating and toxic fumes and gases , toxic fumes of sodium oxide .

Materials Science " magazine

Add artificial edge that allows atomic layer of molybdenum disulfide neat growthTechnology Daily News According to physicist organizational networks reported recently, Rice University and Oak Ridge National Laboratory (ORNL) developed in collaboration with scientists a new method that can control the molybdenum disulfide (MDS) consistently neat atomic layer growth , to manufacture two-dimensional electronic device toward a step forward .  Research published this week in the "natural . Materials Science " magazine.
Molybdenum disulfide is a semiconductor manufacturing functional components are required for two-dimensional electron in one of the three materials , they are expected to be made ​​invisible devices based components. In the latest study , the scientists hope to figure out a large and high-quality atom thick sheet of Molybdenum plate disulfide Can the chemical vapor deposition (CVD) furnaces grow and what features they have .  They want molybdenum disulfide with no band gap of graphene and hexagonal boron nitride insulator (hBN) binding, thereby making appearances effect transistor logic integrated circuits, photodetectors and flexible optoelectronic devices.
Last year, Rice University mechanical engineering and materials science professor Lou jun ( transliteration ) and Plymouth Kerr ? Ajayan said they successfully produced graphene and hexagonal boron nitride formed complex staggered structure, but in order to use they manufacture of advanced electronic equipment, also need a third material - molybdenum disulfide .  However, they said: "The will of molybdenum disulfide and carbon atoms together, we want graphene and molybdenum disulfide ( with hexagonal boron nitride ) combine to create a novel two-dimensional semiconductor parts , but because of their different structures , growth environment is different, so there are a lot of difficulties . They have not found a good way to grow molybdenum disulfide, many try to get the material structure is also inconsistent with the chemical vapor deposition method create molybdenum disulfide particles too small to have useful electrical properties.  But in the new approach, they noted molybdenum disulfide "islands" formed in the furnace is easy , blemishes and even dirt block will appear in the base of the furnace .  Rice University graduate Niina ? Naye Mei said: " with hexagonal boron nitride or graphene is different, molybdenum disulfide difficult nucleation .  However, we found that by toward the base adding any artificial edges nucleation process that can be controlled , and, in between these structures , molybdenum disulfide grow better . new method be grown particles about 100 microns , the nanoscale inside , enough for us to deal with them .
Oak Ridge National Laboratory 's team used aberration-corrected scanning transmission electron microscopy to the atomic structure of this new material imaging in order to clearly see individual atoms and changing the electrical properties of the material defects . The laboratory Juan - Carlos ? Eddie Robb said: " In order to improve the properties of two-dimensional material , first understand how they are put together is very important . Oak Ridge National Laboratory Microscope equipment so that we can see the material for the first time a single atom .  "
Rice University researchers estimate that these substances together so there are many ways , not only can be used in the form of two-dimensional layer can also be used in the form of three-dimensional stack .  Lou Jun said: "' natural crystal ' by the same ingredients together via van der Waals force , and now we can use different ingredients to create a three-dimensional crystal .  These different materials have different electrical properties and band gap, the kind of material placed on top of another so that we can obtain a new material - we called van der Waals solids .stacking order we expected to use any of its put together , this may be a field of materials science , a new approach .

Daxinanling fork molybdenum ore exploration breakthroughs

2013 年 6 月 17 China's Land and Resources reported recently learned that the Heilongjiang provincial key projects - Songling District fork molybdenum lead-zinc polymetallic ore exploration project obtained a new progress, submit the amount of 1.76 million tons of molybdenum metal reserves, the average grade 0.087% molybdenum, Molybdenum plate metal content of 700,000 tons of low-grade, average grade of 0.048% molybdenum, molybdenum totaled approximately 246.6775 million tons; volume of 1 million tons of lead metal and zinc metal content of 14 ten thousand tons; silver metal content of 44 tons, became a world-class multi-metal deposit. China Nonferrous network.
Smooth implementation of the project, due to "geological survey team prospecting, private capital first, state-owned enterprises to follow up" prospecting advanced mechanism. China Nonferrous network. According to the project feasibility study report, project design for the annual production capacity of 16.5 million tons of ore mining, at current prices, the annual output value of 4.1 billion yuan, tax 970 million yuan, 82.11 million yuan compensation for mineral resources; direct placement around 1,500 people, 3,000 indirect job placement, economic and social development on Daxinanling extremely important strategic significance. China Nonferrous network. Currently, the project feasibility study report has been organized by the provincial Development and Reform Commission review of provincial engineering assessment center shall be reported to the National Development and Reform Commission through. China Nonferrous network.
Share to: QQ space Sina microblogging Tencent microblogging letter more 0
Send the world's major mobile newspaper market, prices, analysis, click immediately free trial!0 users have expressed his views, click to view] I Talk 492
Disclaimer: The China Nonferrous network contained in this article does not constitute investment advice, only for reference. If the operation, according to the article, the reader all the consequences conceited, China Nonferrous network assumes no liability.

molybdenum powder

olybdenum and Molybdenum plate alloy powder metallurgy technology Research and Development of a systematic summary of molybdenum and molybdenum alloy powder metallurgy technology research and industrial application status. Molybdenum powder metallurgy theory were discussed, ultrafine (nanometer) molybdenum powder, a large particle size (and high mobility) molybdenum powder, high purity molybdenum powder, molybdenum forming of new technology, new molybdenum sintering technology, molybdenum powder metallurgy process simulation technology 7 Research the technical principles, technical characteristics, status of the device structure and industrial applications, and analyze its development prospects.  Molybdenum and molybdenum alloy having high temperature strength and high hardness, good thermal conductivity and electrical conductivity, low thermal expansion coefficient, excellent wear resistance and corrosion resistance, are widely used in aerospace, energy, electricity, microelectronics, biomedical, mechanical processing, medical equipment, lighting, glass, national defense construction and other fields. This paper systematically summarizes Molybdenum and molybdenum alloy powder metallurgy technology principle, technical characteristics, equipment, structures, and industrial application status, and analyze its development prospects. A molybdenum powder preparation technology as automotive, electronics, aviation, aerospace and other industries growing, molybdenum powder metallurgy products for increasingly demanding high quality, which requires molybdenum powder materials in chemical composition, physical morphology, average particle size, particle size distribution, bulk density, mobility and other aspects with more excellent performance indicators, towards purity molybdenum powder, superfine,

Cylindrical, planar magnetron sputtering target design ideas

4.1 Principle
A rectangular planar Molybdenum plate target structure principle is applied to the cylindrical magnetron sputtering target, the design of cylindrical magnetron sputtering target is called, planar magnetron sputtering target. It combines a flat rectangular coaxial cylindrical target and the target of both worlds. The coating uniformity, and target utilization is higher.
The two rectangular planar targets around the X axis (see Figure 2) curled in a semicircle, and co-interference, shown in Figure 5, the initial completion of a flat rectangular targeting cylindrical, planar magnetron sputtering target evolution. X-axis becomes the axis line, the magnetic field lines of the cylinder 4 is formed on the surface of the closed space, the secondary electrons bound the plasma region e1 movement.
4.2 To solve the technical problem
In the rectangular planar target evolved into a cylindrical, planar target process, the rectangular planar target are arranged along the X-axis direction of the magnet into a cylindrical, planar-type distribution of the target in the axial direction of the magnets. The rectangle in the target plane perpendicular to the X-axis-side ends of the magnet A theory, should the ring A into a circular magnet, and its magnetization direction should be the inner surface and the outer surface of the ring, the inner and outer surfaces should be separately S pole and N pole, as shown in Figure 6. However, this method is almost magnetizing is impossible. Therefore, the design cylindrical, planar magnetron sputtering target, to solve the problem at both ends of the magnetic field is the key to success.

Before plating processing needs to do what work?

Electroplating pretreatment affects plating effect, countless proved that if there is oil or rust metal surface such as non-metallic substances, although when the coating can be deposited, but because of oil "Molybdenum plate" level of the plating layer formation, adhesion strength, corrosion-resistant is affected, even deposition is not continuous, osteoporosis, and even coating flaking, so the loss of the actual use value. Therefore, before plating process to become an important process operation. Before plating processing needs to do what work it? Here PHNIX plating heat pump simply summarize for you.
Before plating treatment, called before processing (pretreatment), do need to do the following pre-treatment:
1, Wash: Removal of the metal surface of the oil, fat, abrasives, and sludge. Available jet wash, solvent wash, wash or electrolytic immersion wash.
2, cleaning: Wash with cold or hot water during the cleaning agent residue or dirt. 3, acid leaching: go to rust dirt or other oxide film, pay attention to prevent the substrate from corrosion or hydrogen embrittlement. Inhibitors can be added in order to avoid excessive acid leaching. After acid leaching to adequately cleaned.4, activation: Promoting adherence of coating, can be used a variety of acid activation of the molybdenum plating surface.5 Rinse: immediately before the removal of acid plating film, and then plating.Applied to the electrodes or a part rack, so that the parts of the surface layer of non-conductive material.
46 wetting agent:
Parts can reduce the interfacial tension between the solution, the workpiece surface is easy to be wetted substances.
47 Additives:
Contained in the solution can be improved electrochemical performance or improve the quality of the solution a small amount of additives.

When the copper plating aluminum industry and commerce investigated and dealt with bad business to sell

Make arrangements for the wedding to his son, Tang Xing County purchased 100 m wire for lighting. Wedding reached a climax when the wire suddenly caught fire. Recently, the business of law enforcement officers to investigate that accident based businesses will sell copper as copper or aluminum wires Tang cause.
July 26, Xing'an County of Industry and Commerce and Industry Bureau Chengguan Tang received complaints: son home weddings require lighting, he went to the county to spend 100 yuan Xiemou shop purchase 100 m twist copper wire. Unexpectedly, wedding wire when suddenly caught fire, causing fire. Although the timely rescue did not cause major damage, but the wedding broke up. Later, the village electrician check the wiring is false to say that the copper wire, so the fire.
Trade and Industry officials view the discovery, Tang bought is actually called aluminum wire copper wire, outside coated with a layer of copper, and copper is no different from the appearance.
Twisted wire, professional named conductor PVC insulated twisted flexible cord for connection, also known as multi-strand twisted pair cable, model referred to as the RVS. Accordance with the national Molybdenum plate industry standards JB8734.3-1998 defined, RVS should be copper core. Copper wire thermal stability than aluminum, copper resistance, low heat. Aluminum resistance, heat large. Business officers learned that Tang at 50 m wire installed four 500-watt light bulb, if copper wire is not going to fire.
Business officers immediately went to the merchant's store checks. Owner Xiemou admit, Tang buying a shop selling a length of 100 meters RVS plastic twist wires. Law enforcement officers on the spot with scissors some twist wire, remove the outside of the rubber, I saw thin core surface is copper-colored. Take scissors scraping core wire, wire cross-section exposed silver-white, indicating that copper-plated aluminum. Face the facts, Xiemou recognize these wires are cheap cannabis purchased from Hunan. Because this wire copper wire cheaper than authentic half, so sales are good. Law enforcement officers seized in his shop, copper or aluminum wires 67 such volumes 6,700 meters, all to be seized and criminal investigation.
July 30, Xing County Business sector organizations of the county law enforcement officers to check the building Molybdenum tube market. In the examination of 14 sales outlets in the wire, there are seven shops selling the aluminum copper flower line, only four shops selling cannabis wire is copper, there are three lines and sell two kinds of flowers. These lines are mostly aluminum copper flower rolls and mostly no origin. Law enforcement officers based on the quality of our products the relevant provisions of law, the copper or aluminum wires confiscated.
Law enforcement officers said the aluminum wire chemical stability, easily oxidized, there are security risks. Many people do not understand businesses use to identify weaknesses, as the aluminum copper wire copper wire to sell, harm the legitimate rights and interests.
After consolidation, the current copper wire Xing'an County market has basically been standardized.

Current products are more suitable for smaller plating.

Brightener: DX-3, DX-4 belongs to pure organic brightener, no lead. And which are peculiar to the anode active ingredients added, long-term use, can be increased without troubles carbonate. DX-3 is a high area brightener cuprous cyanide in production and have a similar effect, it makes the coating reddish color. DX-4 is a low area brightener and sodium cyanide in production have a similar effect, too many white color. DX-3: DX-4 normal 1:4 consumption, normally 50-70 minutes plating can reach nearly mirror light, lay the foundation for subsequent plating. It should be noted that the DX-3 and DX-4 bath composition according to the proportion of consumption adjustment; when the copper content is high, then the bath DX-4 consume more, sometimes DX-3 is not consumed. When the bath copper content is low, the free cyanide is high, then the DX-3 consume more.
Alkaline copper brightener DX-5 also belong to the pure organic brightener, no lead, but a single additional, also can achieve near-specular light. Current products are more suitable for smaller plating.
Temperature: Average 40-55 ℃. Temperature is too high the workshop environment is poor, waste of energy, accelerated decomposition of sodium cyanide. Temperature is too low, the speed is slow, inefficient and poor brightness.
Then anodized: Zinc alloy plating barrel plating requires fast, dense coating. Anodic dissolution of the normal requirements, thus requiring adequate anode area, not directly linked to the copper on the anode, but should be cut into small pieces into the blue titanium copper to increase the anode area.
Simply fill in peacetime Molybdenum plate of sodium cyanide, cuprous cyanide is supplemented by anodic dissolution. Copper is supplemented by anodic dissolution plating bath, dense coating, usually by complement cuprous cyanide copper plating solution is maintained not dense coating, plating long time, but the high cost of plating.
Practice has proved that the normal bath anodic dissolution of carbonate is not exceeded. Because the normal anodic dissolution of carbonate formation few opportunities, but also to bring out Tungsten eletrode long-term consumption of the bath.
Copper anode dissolution of the normal color is slightly darker red. Free cyanide is too bright too. Syrup blue, green hair anode is free cyanide is too low. Gray hair indicates carbonates too high. Black coating when there are likely to have lead impurity spots, brittleness.
Practice has proved that cyanide copper plating barrel plating anodes anode bags should not be used.
Drum should be designed to be generally smaller in diameter, long, so that uniform coating, plating speed.
Besides the general requirements thicker conductive copper because zinc alloy plating current is relatively large.
Of course, a beautiful barrel plating products also involves many aspects of the problem. These are only the author of the alkaline copper-plated zinc alloy roll a little experience, experts treatise.

Rolling knife Rolling knife blade

Metallurgical industry in the production of a variety of shearing, punching, rolling cutter films, strict implementation GB/T1828.2 standards, product quality is stable, especially for scrap steel, stainless steel, billets and other cuts.
Used in hot and cold plate transverse shear, slitting, cold-rolled and hot-rolled and other materials, mainly W6MoCr4V2, HBK, 3CrW8V, SLD, 5CrW2si, 6CrW2Si, H13, etc. produced by processing high-quality tool steel, sharp knife durable durable.
Casting
Rolling knife with alloy welding technology, greatly improved tool life and shear effects; rod temperature shear blades mainly 6CrW2Si, H13K, 65NB HMB other high-quality tool steel is made of abrasion, cut flat, products without thorns, good heat dissipation.
Cold, hot shear knives
In hot, we use a lot of high-quality steel for the cross-cutting Molybdenum plate such as nickel-base alloy with good heat resistance made ​​crosscut knives, can be cut: hot rolled thick steel billet, steel ingot thick steel plate and tail, steel bars, round steel, etc.
In the cold, hot, we use a lot of high-alloy tool steel, heavy end of the crosscut knife metallurgical steel as the basic material, thus making the crosscut knives, can be cut: a variety of cold-rolled sheet, plate, generous boards of various steel; edge material crushing, all kinds of steel scrap shears forming shear, flying shear crosscut

Molybdenum powder metallurgy and the subsequent preparation of the deformation process.

Using isostatic pressing the mixed powder made of molybdenum plating green. The compacts in hydrogen protective atmosphere 2000-2200 ° C high temperature sintering. Sintered billet in the temperature range of 1200-1500 ° C rolling. Density of the material increases with increased amount of deformation. The melting point of pure molybdenum 2620 ° C. High melting point, high temperature strength make the material available in 1900 ° C high temperature.
      Tube industry: for the borosilicate glass tube with vacuum sealed connection molybdenum wire, molybdenum especially polished prongs; made ​​by the molybdenum wire can withstand the tremendous heat stress grille; used to improve the electron emission characteristics the gold-plated molybdenum wire; launch tube tetrode short, high-power electron tube such as a tetrode anode, the auxiliary anode, a cathode supporting member, and other structures; microwave magnetron molybdenum and molybdenum pins, etc., an end cap.
Semiconductor Technology: Molybdenum similar coefficient of thermal expansion of silicon, molybdenum, and the semiconductor element of the transistor has been widely application. Molybdenum silicon wafer used as a substrate, a cathode side connecting molybdenum wafer and ring.
Switches and contacts: mercury switches and relays special telephone contacts.
  Yixing City, built of Metal Products Co., Ltd. is located in Yixing City, the beautiful Xijiu Sea, founded in 2007, treat people with sincerity, reputation oriented business philosophy, foreign joint collaboration to expand the business channels. Products related to hardware, electronics, chemicals, lighting and other high-temperature furnace Metal Products Co., Ltd. all staff sincerely welcome friends to negotiate business, to become one of your best partner to jointly develop, growing of create a better future!

Preparation of magnesium borate whisker

578701950084 with damping crystal pulling apparatus rotation
578 700 720 085 one suitable molecular beam epitaxy method of preparing an oxide film
578701540086 bismuth borate Bridgman crystal growth process
578701310087 cerium-doped yttrium aluminum garnet crystal growth method
578 700 850 088 use of nano-crystalline particles of amorphous silica Method
578700050089 neodymium-doped strontium scandium, yttrium borate laser crystal and its preparation and use
578 700 370 090 semiconductor crystal growing Molybdenum plate and the semiconductor light emitting element
578 700 430 091 quartz glass and the reactivity of the molten silicon and the molten silicon surface vibration evaluation process
578700330092 Anti X-ray irradiation of cerium-doped spinel crystal and preparation method
578701160093 monolithic three-cavity infrared heating ultrahigh vacuum chemical vapor deposition epitaxy system
578 700 520 094 crystal pulling apparatus of the superconducting magnet apparatus
578700250095 one kind of gypsum whisker and its manufacturing method and application
578700550096 generate state single crystal of calcium fluoride
578701700097 ultraviolet absorbent sapphire crystal
578700160098 heavy manufacturing facilities on the vertical laser crystal bonding method
578701480099 one kind of stone with magnesite MgO crystal growth method
578 701 960 100 production of high strength with a Czochralski method for preparing a seed
578 700 080 101 a polysilicon charge molten silicon melt prepared in a method and apparatus
578700260102 monitoring for semiconductor growth pullers method of gaseous environment
578701880103 provided a parallel bundle method for making nano-zinc oxide whisker
578700980104 one kind of synthesis of magnesium salt whisker
578701530105 EO Q-switched high stability crystal of lithium niobate and its preparation method
578701610106 atmosphere for lithium vapor transport equilibration method crucible
578701030107 directional growth of columnar grain and single crystal alloy preparation method
578 700 280 108 a magnetic field using a magnetic field furnace furnace and one method of manufacturing a semiconductor substrate,
578700360109 large scale preparation of β-SiC nano-whiskers methods
578 701 240 110 a magnetic garnet single crystal film-forming substrate, an optical element and method
578700270111 flat surface membrane temperature superconductivity
578700490112 Ⅱ Ⅵ racial or ethnic lines Ⅲ Ⅴ single crystalline ferromagnetic and ferromagnetic properties of compounds adjustment method
578 701 070 113 gadolinium orthosilicate single crystal growth method
578 701 490 114 trivalent cerium ion-doped yttrium aluminum garnet preparation of scintillation crystal

Molybdenum rod machining operations

Molding, sintering, drape forging, car light or polishing, machining.
Two. Classification of Molybdenum crucible rod
Material Category:
1, pure molybdenum rod: molybdenum content of greater than 99.95%.
     2, high temperature molybdenum rod (lanthanum molybdenum alloy bar): 0.4 to 1.2% lanthanum, molybdenum content of impurities outside the margin.
     3, TZM molybdenum rod: 0.4 ~ 0.6Ti, 0.07 ~ 0.12Zr, 0.01 ~ 0.05C.
Surface state by Category:
A sintered molybdenum rod: Surface silver gray metallic luster, density 9.8g / cc.
    2, forging molybdenum rod: the surface with a layer of oxide, black surface, the density 10.2g / cc.
    3, car light Molybdenum plate rod: the forging molybdenum rod by lathe machining, surface smooth, metallic luster.
   4, polished molybdenum rod: silver gray metallic luster, smooth surface, size small error.
III. Molybdenum rod surface oxide removal method
1, easily oxidized molybdenum products have properties. Severe oxide to be removed, with a strong acid (hydrofluoric acid, nitric acid, hydrochloric acid, etc.) processing, the operation note.
     2, mild oxide abrasive cleaning agent using the Add, with a soft cloth or sponge to wipe, then wash with warm water.