Rubidium (Rb) is a dilute chemical substance, very soft silver white wax metal. It is soft and light, and its chemical properties are more active than potassium. It can be used for the production of special glass, micro high energy battery and crystal scintillation counter. The minerals containing rubidium are mica and potash feldspar, mainly in wolframite and scheelite.

The tungsten carbide mining button is composed of mining button handle, button head and alloy cutter head. The mining button handle and its cutter head are collectively referred to knife body. Its hardness is 40-45HRC. The pounding tenacity is not less than 49J/cm2.

The tungsten powder commonly used in the industry is mainly obtained by reducing tungsten oxide with hydrogen. Such tungsten powder has irregular particle shape, poor fluidity, low bulk density, and it is difficult to obtain a tungsten body with continuous micropores by sintering. In recent years, the demand for near-spherical or spherical tungsten powder has increased day by day, and is widely used in powder metallurgy processes such as porous material preparation, thermal spraying and injection molding.

The current tungsten filaments in bulbs are tungsten alloy wires made of ammonium paratungstate (APT) as main material with potassium, aluminum and silicon. This tungsten alloy wire thus has the disadvantages of low cold resistance, low thermal resistance, and poor photoelectric performance. In the process of tungsten wire manufacture, the rotary forging and drawing process will harden the tungsten alloy, and increases internal stress, thus it is easy to break when pulling; this increases the difficulty of production. The hardening of the alloy and the presence of internal stresses result in a shorter service life of the tungsten wire and poorer impact resistance, and the filament is prone to sagging after use.