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Silicon nitride   Si3N4   is a non-oxide high temperature ceramic structural material. Powdered Si3N4 can be prepared by reacting a mixture of SiCl4 vapor and NH3 gas. Powdered Si3N4 is unstable to air and water. Powdered Si3N4 can form a pungent odor, a gas commonly used as a refrigerant and a poorly soluble acid when it is in contact with water. Powdered Si3N4 can generate N2 and contact with air. a substance. However, heat treatment of powdered Si3N4 and appropriate amount of MgO (refractory) in a closed vessel at 230 ° C, 1.01 × 105 Pa and 185 ° C, can obtain a solid material with a very tight structure and relatively stable air and water. (1) Write the reaction equation for the preparation of Si3N4 from SiCl4 and NH3: ______. The mixture of vapor of SiCl4 and NH3 reacts to form Si3N4, and its chemical equation is: 3SiCl4+4NH3═Si3N4+12HCl; so the answer is: 3SiCl4+4NH3═Si3N4+12HCl; (2) Write the equation for the reaction of powdered Si3N4 and H2O and O2 respectively...

Nano gold powder  refers to tiny particles of gold with a diameter of 1 to 100 nm. It has high electron density, dielectric properties and catalytic properties, and can bind to a variety of biomacromolecules without affecting its biological activity. Preparation of gold nanoparticles with different particle sizes by chloroauric acid reduction. The effect on human skin is as follows: By massaging the nanoparticles, the gold nanoparticles can quickly penetrate the skin's dermis, double the skin's ability to lock water, produce more collagen on the skin to fight free radicals, prevent skin aging, reduce facial skin fine lines, and make the skin plump, Tight, elastic, activates the entire cell from the skin to the skin. It has the functions of sterilization, anti-inflammatory and detoxification. It can effectively repair wounds, no allergies, no irritation, and can form protective omentum in the skin dermis, and maintain antibacterial effect for a long time. Instantly pen...

Application of Ultrafine Palladium: The main applications of nano-palladium powder are thick film paste for the electronics industry, preparation of thick film silver-palladium conductor paste, and internal and external electrode materials for multilayer ceramic capacitors. Storage conditions: Ultrafine Palladium should be sealed and stored in a dry and cool environment. It should not be exposed to the air for a long time, to prevent agglomeration due to moisture, affecting the dispersion performance and use effect, and should avoid heavy pressure, do not contact with oxidant, and transport according to ordinary goods. Note: We can supply different size products of Ultrafine Palladium according to client's requirements. Nano palladium has high surface activity and has been widely used in microelectronic materials, such as thick film paste of electronic industry, preparation of thick film silver-palladium conductor paste, and internal and external electrode materials of m...

Specification of  Platinum nanopowder : Part No. Particle Purity (%) SSA (m2/g) Bulk density (g/cm3) Density (g/c m3) Crystal Color MP78-20N 20-30nm 99.95 45.3 0.23 spherical black Note: We can supply different size products of Platinum nanopowder according to client's requirements. Platinum metal has high melting point, good electrical conductivity and corrosion resistance, high high temperature strength and high temperature creep resistance, high temperature stability, strong catalytic oxidation function after processing into nanometer-sized particles, anti-corrosion, non-toxic ,. These characteristics make it an important material for modern industrial and national defense construction. Application of  Platinum nanopowder : Widely used in aviation, aerospace, missile, rocket, atomic energy, microelectronics, chemical, glass, gas purification and metallurgical industries. In recent years, the use of nano-platinum powder in...

Floor cleaning cannot be imagined without a  mop bucket .There are innumerable types of bucket and mop these days, so it is now a competitive industry and high-end products stands firm against stiff competition.But lately we have a new design good quality cheap buckets are available on that serve all kinds of purposes and have Mid-year promotion this year. Used whole new PP, not old material mixed in,more heavier,will not broken and out of shape in rough working environment.Molded-in wave baffles reduce wave motion, resulting in 40% less splashing and spills., so drying time is cut back and safety is improved.The  bucket wringer  lasts for over 40,000 wringing cycles.This spring allows you to effectively push the handle forward to strain water from your mop.To further improve worker welfare, consider adding the  Heavy Duty Mop Bucket  to your facility to speed up cleaning time.  

First, the advantages of  yttria stabilized zirconia YSZ Common zirconia stabilizers are usually alkaline earth oxides or rare earth oxides such as cerium oxide, cerium oxide, calcium oxide, magnesium oxide. The stability of these stabilizers to stabilize zirconia is roughly similar, but the performance is different. In application, yttria doped zirconia has good comprehensive properties and is the most widely used solid electrolyte; stabilized zirconia doped with yttria has the best conductivity, but its mechanical properties are relatively poor; Stabilized zirconia has better performance than other stabilizers, and is relatively cheap, but easy to decalcify and destabilize; stabilized zirconia doped with magnesium oxide has general conductivity and low price, but its long-term use performance is poor, and it is generally used as a consumable. Cerium oxide is used as a stabilizer, and this material is mainly a tetragonal structure. It has the highest flexural strength of all zir...