Planetary ball mill is a high energy ball mill, which is mainly used in the preparation of ultrafine tungsten powder. Planetary ball mill has two types: vertical and horizontal. 

Planetary ball mill is a kind of high energy ball mill, which is mainly used in the preparation of ultrafine tungsten powder.

Hot cathode is widely used in civil, medical and military fields.

Microwave absorbing material is an important stealth form in stealth technology.

Neutron diffraction usually refers to the Prague diffraction of neutrons (thermal neutrons) passing through crystalline material when the De Broglie wavelength is about 0.1 nm.

The preparation methods of ultrafine powder are mainly divided into two kinds: chemical method and physical method.

Tungstic acid can be roughly divided into yellow tungstic acid and white tungstic acid.

Electrochromic is the phenomenon that the optical properties of materials change stably and reversibly under the action of applied electric field.

Nano tungsten oxide is considered to be one of the most promising new oxides gas sensing materials that detects nitrogen oxides, hydrogen sulfide, and acetone and other harmful gases.