In the field of powder metallurgy manufacturing technology, grinding needles made of powder cemented carbide are widely used in mechanical drilling and dressing of jades, mechanical drilling of printed circuit boards, etc. Tungsten carbide grinding needle is a kind of cemented carbide grinding needle. Its structure is characterized by solid grinding needle, small diameter, long length, small tolerance range of length and size and high requirement of verticality.

Photocatalytic reactions can degrade almost all organic contaminants such as alkanes, halogenated alkanes, alcohols, carboxylic acids, alkenes, aromatic hydrocarbons, halogenated aromatic compounds, polymers, insecticides, herbicides, dyes and brominated flame retardants. Contaminants such as disinfection by-products. Therefore, photocatalysis technology is considered to be an ideal new technology for environmental management and a most promising means of controlling environmental pollution.

Hydrogen reacts with oxygen to form water, which does not pollute the environment. It is a clean energy and can also be used in chemical production processes such as ammonia synthesis. Electrochemical catalytic is a major method of hydrogen production. However, precious metal materials represented by platinum-based metals are expensive and have a small amount of resource storage, which limits the development of electrocatalytic hydrogen production.

In the field of inorganic semiconductor materials, cadmium sulfide is a typical semiconductor. The CdS photocatalyst has a band gap of 2.4 eV at room temperature, and the conduction band potential (-0.87 eV) and valence band potential (1.5 eV) can meet the conditions of complete photolysis of water. . Therefore, cadmium sulfide can improve the utilization of sunlight and become one of the most attractive semiconductor catalysts in sulfide systems.

Tungsten oxide is an n-type semiconductor and is a typical transition metal oxide. As a functional material, it is applied to industrial catalysts, electrochromic, battery electrodes, solar energy absorbing materials, invisible materials, gas sensing materials, and the like. Especially in the field of oxide semiconductor gas sensor applications, tungsten oxide-based materials have been considered as one of the most promising new oxide gas sensing materials for detecting NOx, SOx, NH3 and H2S.

Infrared light, especially near-infrared, has a significant thermal effect, which tends to cause temperature rise, which causes an increase in temperature, such as indoors or in a car. The currently disclosed infrared barrier materials generally refer to a class of functional materials that have a strong absorption or reflection of infrared light without affecting the transmission of visible light.

Nanomaterials refer to materials whose dimensions reach the nanometer scale in a certain dimension, two-dimensional or three-dimensional direction. It can be divided into zero-dimensional materials, one-dimensional materials, two-dimensional materials, three-dimensional materials. When a conventional material reaches the nanometer scale, its properties will be very different from usual.

Magnetron is currently the most efficient microwave device, and it has a huge application market in the fields of civil heating and radiology. In recent years, with the rapid growth of microwave application markets such as radiology and container inspection, magnetrons continue to develop in the direction of high power, high frequency, miniaturization and low cost.

Electrochromism refers to a stable and reversible change in the color or transmittance of a material under the action of an applied voltage or electric field. At present, electrochromic materials are considered to be one of the most promising smart materials, and have great potential application value in the direction of smart window, automobile anti-glare rearview mirror and electrochromic display.

Depleted uranium composites are the most excellent penetrating core materials due to their excellent self-sharpness. In the early 1990s, based on the international public opinion and environmental pressure caused by the toxicity of depleted uranium materials, the United States began to develop an alternative uranium armor piercing core. material. On the basis of the tungsten-nickel-iron heavy alloy, the researchers designed a tungsten-based heavy alloy armor-piercing projectile through the change of the microstructure of the alloy, but there is still a big gap between the self-sharpening effect of the depleted uranium alloy.