The tungsten sponge is the major carrier of the impregnated ruthenium tungsten cathode. The pores in the sponge are used to store the emissive material and at the same time serve as a transport channel for the emissive material. So far, the major difficulty in preparing the uniform distribution of tungsten sponges is that the particle size of tungsten powder is not uniform.

According to China Geological Survey, scientists from the Chengdu Geological Survey under China Geological Survey identified a large gneiss dome structure in the south of the Zhaxikang mining area in the eastern Himalayas. The high-differential pale-colored granite has multi-period intrusion characteristics, and a thick silicon skarn-type bismuth-tin-tungsten rare metal ore body is found in the edge of the dome.

The tungsten alloy bullets produced in China are called tungsten core shelling armor-piercing projectiles. In the 1960s, the United States and other Western countries introduced rotary-stabilized tungsten-shelled armor-piercing projectiles on small-caliber guns at the same time. Their excellent armor-piercing performance caused great concern in the socialist countries. In order to improve the ability of infantry weapons to deal with thin steel armor and effectively prevent air defense at close range, China has applied the rotary stable shelling technology used on the shells to the bullets, and developed the first generation of tungsten core shelling armor-piercing projectiles.

Tungsten is the most promising plasma material to be used in fusion reactors due to its high melting point, low coefficient of thermal expansion, low sputter corrosion rate, high thermal conductivity, low hydrogen retention, and high strength at high temperatures. These excellent properties make tungsten has the ability to stand high doses of particle irradiation (such as neutron irradiation) and high heat flow in a fusion reactor.

The main raw materials for the metallurgy of tungsten are wolframite and scheelite. However, with the exploitation of tungsten resources, the grades of the tungsten resources are reduced, the composition of the components is complicated, and associated with other metals, which makes the cost of tungsten ore metallurgy increase. 

The scheelite is often associated with sulfide ores such as copper-lead-zinc ore and calcium-containing gangue minerals such as calcite and fluorite. At present, it is common to separate the sulphide ores and then scheelite.

In the field of microwave electric vacuum device, the preparation of tungsten sponge with uniform pore size is the key to achieve uniform emission of tantalum tungsten cathode current. The tungsten sponge is the main carrier of the impregnated ruthenium tungsten cathode and is made by powder metallurgy. The pores in the sponge are used to store the emitting material and at the same time serve as a transport channel for the emitting material.

Currently, there are three industrial methods for purifying the Ammonium paratungstate (APT) solution from the sodium tungstate solution: chemical method, ion exchange method, and solvent extraction method. Wherein the classical chemical method consumes large energy and has low production, it has been less frequently used. Both ion exchange and solvent extraction have their own advantages and disadvantages.

Molybdenum is a strictly controlled impurity element in tungsten products. China's national standard GB10116-88 stipulates that molybdenum is not more than 20ppm in the 0 grade ammonium paratungstate. At the same time, tungsten is also a strictly controlled impurity element in molybdenum products. The national standard GB/T3480-2007 stipulates that MSA-0 grade molybdenum acid is not more than 150ppm in the product.

Tungsten carbide (WC) is a black six party crystal with metallic luster and hardness similar to diamond. It is an important cemented carbide material. In the new field of science and technology, tungsten carbide has the catalytic effect of platinum like (Pt).