Solid acid catalysts (SACs) have a widely and valuable industrial applications such as petroleum, biodiesel, and chemical industries. SACS are considered as the most important categories of catalysts that serve the petroleum industry. Thus, SACs promote environmentally benign heterogeneous catalysts that assist wide industrial applications.

There are four preparation methods of tungsten alloy balls, namely compression molding, disc pelletizing, squeeze-cut rotation and injection molding.

The low-temperature ductility of the tungsten wire is the main factor affecting the winding performance. The main influencing factors are the purity of raw materials, additives and the surface condition of the wire.

Molybdenum (Mo) and molybdenum alloy materials have wide applications in the manufacturing industry, aerospace industry, steel smelting, petrochemical industry, medical devices, national defense construction and other industrial fields. In the field of medicine, the most widely known and closely relevant to our lives is molybdenum target.

With the development of science and technology, molybdenum shows its advantages in many fields, which has changed human life in various aspects, one of the familiar applications is to manufacture liquid crystal display. Large-size high purity molybdenum sputtering target is the key raw material in the producing of LCD panel, and Mo is one of the preferred materials for sputtering target of LCD panel. This kind of target is used in the daily color TV, intelligent phone, tablet computer and some large household appliances, as well as the control screens of some military communication equipment and other electronic products.

Molybdenum powder prepared by traditional technology is often used to be raw material of molybdenum sintered products, the common preparation methods include reduction method, fluidized bed reduction method, hydroxyl thermal decomposition method etc.

Large-size tungsten-based heavy alloy has a series of advantages including high density, low coefficient of thermal expansion, good oxidation resistance and corrosion resistance, etc. In fields of aerospace, electronic information and so on, large-size and high performance tungsten-based heavy alloy is in urgent need. Find the rule of internal structure of large-size tungsten based high specific gravity alloy during liquid phase sintering process to obtain high homogeneity, high performance and parts of large-size tungsten based high specific gravity alloy.

The cost of traditional high density tungsten alloy is high, as 3C industry begins to use small-size high density W-alloy part as counterweight material, higher requirement is put forward for the forming technology of high density W-alloy. Therefore metal powder injection molding (MIM) technology appears, it is a new near net forming technology for part, which combines plastic injection molding technology with powder metallurgy technology, it can effectively promote the wide use of high density W-alloy materials in 3C and other high-tech industries.

High density tungsten alloy has excellent mechanical property, anti burning property and absorption ability to radiation. Therefore, it is used in explosive parts such as armor piercing bomb. Normally, the part should keep well after impacted by the front end explosion, but in the test, the component breaks without external force.

Tungsten carbide (chemical formula WC) is the compound made up of tungsten and carbon, following will show the preparation procedure. The molecular formula is WC and the molecular weight is 195.85, which is black hexagonal crystal with metallic luster and has similar hardness to diamond. It is a good conductor of electricity and heat.