1. The reaction condition is high temperature.
2. The reaction equation is: three moles of hydrogen plus one mole of tungsten trioxide will generate one mole of tungsten and three moles of water under high temperature reaction conditions.
3. The reaction phenomenon is that the dark blue tungsten oxide turns into gray black tungsten, and water vapor is generated at the same time.
4. The reaction principle is: tungsten trioxide hydrogen reduction is a method of preparing tungsten powder by reducing tungsten trioxide powder into metal tungsten powder with hydrogen reducing agent. It can produce high-purity tungsten powder and its particle size is easy to control. It was widely used in the world. It was a classic method for preparing tungsten powder in the early years, but now it is gradually replaced by blue tungsten hydrogen reduction.
5. Tungsten oxide is also used as a pigment in ceramics and paints due to its rich yellow element. Tungsten trioxide is used for many purposes in daily life. It is often used in industrial X-ray screen phosphor and fireproof fabric to produce tungstate.