Method for preparing pressed scandia-doped dispenser cathodes using microwave sintering
The present disclosure discloses a preparation method of pressed Scandia-doped dispenser cathode using microwave sintering. Embodiments of the present disclosure include dissolving some nitrates and ammonium metatungstate with deionized water to prepare a homogeneous solution. Precursor powder with uniform size is obtained by spray drying, the precursor powder is decomposed, and two-step reduction may be proceeded to form doped tungsten powder with uniform element distribution. The cathode is prepared by one-time microwave sintering. One-time forming of cathode sintering is realized, and sintering shrinkage and sintering time are reduced significantly. The method has excellent repeatability, and the cathode has a homogeneous structure and excellent emission performance at 950° C.
Beijing University of Technology
B H B B H H C B H B H B
B22F H01J B22F B22F H01J H01J C22B B22F H01J B22F H01J B22F
inventional additional inventional inventional inventional inventional inventional additional additional additional inventional inventional
Mingchaung Wei Yunfei Jinshu Yiman Quan Liran Fan
Tian Liu Yang Wang Wang Zhang Dong Zhou