Other Articles

Application and prospect of molybdenum carbide in electrocatalytic hydrogen production

With the depletion of petroleum, coal and other traditional fossil energy and the worsening of environmental problems, the traditional energy structure system based on fossil energy is facing unprecedented crisis and challenge. Hydrogen, with its high energy density, excellent combustion performance, clean and pollution-free, is the best alternative to green energy from traditional fossil energy. However, the utilization of hydrogen energy depends on the development of hydrogen production technology to a large extent. At present, industrial hydrogen production technology [...]

The invention relates to a preparation method of nano-scale neodymium oxide lubricating oil additive

Lubricating oil is a common lubricating material, which can reduce equipment wear and tear, prolong equipment service life and reduce maintenance cost. Lubricating oil is composed of different types of base oils and various additives with different properties, among which additives can make up for the deficiency in the performance of base oils, which is an important factor to improve the properties and quality of oil products. With the increasingly harsh working conditions of equipment and the strict requirements [...]

To verify the microstructure and properties of laser cladding tungsten carbide nanometer layer

In tungsten carbide, carbon atoms embedded in the gap of the tungsten metal lattice do not destroy the original metal lattice and form interstitial solid solution, so it is also called interstitial compound. Tungsten carbide can be prepared by heating a mixture of tungsten and carbon at high temperatures, and the presence of hydrogen or warp accelerates the reaction. If the oxygen-containing compound of tungsten is used for preparation, the product must eventually be vacuumed at 1500℃ to remove [...]

Preparation of nanometer tungsten carbide composite powder

Tungsten carbide is a black gray crystalline powder. Relative density 15.6(18/4℃), melting point 2600℃, boiling point 6000℃, Mohs hardness 9. Tungsten carbide insoluble in water, hydrochloric acid or sulfuric acid, soluble in nitric acid and hydrofluoric acid mixture. Tungsten carbide reacts strongly with fluorine at room temperature and is oxidized to tungsten oxide when heated in air. At 1550 ~ 1650℃, the metal tungsten powder can be directly combined with carbon black, or at 1150℃, the tungsten powder can [...]

Titanium suboxide Conductive ceramic electrode material (Ti4O7)

The titanium suboxide ceramic electrode material is produced by reducing high-purity titanium dioxide powder by hydrogen H2 at a high temperature of 1200 degrees. The main crystal phase is Ti4O7. The appearance of the product is blue-black flow dynamic powder. High conductivity of metal-like materials. Excellent chemical stability against acids and alkalis. Unique electrochemical performance. With high mechanical strength, it can be easily formed into electrode shapes such as plates, tubes, and rods. The outstanding physical property of titanium suboxide is that it has good electrical [...]

Comparison of ni-cr and tantalum nitride film resistors in communication applications

Prior to the widespread acceptance of surface mounted sheet resistors in the 1980s and 1990s, metallized hole mounted molded resistance was usually used in precision applications. Through hole mounted discrete resistors have always been made by depositing thin film resistive materials on cylindrical ceramics. The leads are connected to both ends of the ceramic and the columnar resistance devices are molded or coated to produce a fully sealed product as shown in figure 1. The sheet resistance shown in [...]

China Molybdenum Industry Status

As of the end of 1996, China has identified 222 molybdenum mining areas, distributed in 29 provinces, autonomous regions and municipalities. Molybdenum reserves reach 8.4200 million tons, of which A + B + C grade accounts for 39.8% of the reserves, which is 3.345 million tons. For example, compared with China ’s industrial reserves (A + B + C) and western countries ’reserve bases, China ’s Lower than the US 5.4 million tons, reserves basis), and higher than Chile [...]

About the MOCVD

Summary of MOCVD MOCVD(Metal Organic Chemical Vapor Deposition) technology, also known as OMVPE, MOVPE, etc., is a new technology proposed by rockwell corporation in 1968 for the preparation of compound semiconductor single thin films. MOCVD technique is to dilute the metal organic compounds in the carrier gas and Ⅴ ethnic or Ⅵ hydride in the heated elements of substrate and decomposition reaction, the products of the reaction, reaction to the epitaxial substrate to form a technology of epitaxial film, this [...]

Properties and application prospects of ferric oxide nanometer powders

gas-sensitive characteristics and applications Due to surface effect, when the environment changes, the ion valence state of particle on the surface or interface and electronic changes with the change of external environment, can be made sensitive sensors, nanometer alpha Fe2O3 studies have found that they have a good of flammable or toxic gas detection of gas sensitive properties, used for hydrogen, ethanol, carbon monoxide and other toxic gas detection. Zhang et al. [9] studied the sensing characteristics of ethanol with [...]

Crystal ferrocene has a wide range of applications and excellent practical results

Crystal ferrocene is a kind of burning rate catalysts, appearance is orange spicules, ferrocene in the powder and the latest crystalline morphology, crystalline in nature and the powder is the same, but in actual use crystal ferrocene can solve the problem of powder of ferrocene fly powder, reduce the unnecessary loss, and crystalline ferrocene dissolved more thoroughly, the effect is better. Ferrocene is also known as ferrodicyclopentadiene. The boiling point is above 200 degrees Celsius, the melting point is [...]