文献名： Oleic acid as grinding aid and surface antioxidant for ultrafine zirconium hydride particle preparation

作者 ： Yonghao Tan ， Lin Sha ， Jun Qu ， Jinqi Jiang ， Jie Ren ， Chenjie Wu ， Zhigao Xu

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, College of Resources and Environmental Science, South-Central University for Nationalities, Wuhan 430074, China

摘要： ZrH ₂  is brittle and easy to grind into ultrafine particles, which can be further thermally dehydrogenated to produce fine metal zirconium powder. However, surface oxidation of ZrH ₂  usually occurs during the grinding process. In this study, oleic acid was employed as a grinding aid and surface antioxidant for ultrafine ZrH ₂  preparation by wet ball milling in ethanol solution. With the addition of oleic acid, the particle size ( d ₅₀ ) of ZrH ₂  after milling was reduced from 9.10 to 3.21 μm, and the surface oxygen content decreased from 21.65% to 13.11%. The zeta potential of the ZrH ₂  surface was positive and the oleate anion was adsorbed on the ZrH ₂  surface by electrostatic adsorption. Oleic acid acted as a grinding aid, improving the grinding efficiency of ZrH ₂ , and also as a coating film protecting ZrH ₂  from surface oxidation. Ultrafine ZrH ₂  particles with high purity can be manufactured by the proposed wet ball milling process, which has great potential for practical industrial production. The approach based on surfactant addition to improve the grinding efficiency and surface protection could also be applied for the preparation of other ultrafine materials using wet ball milling.

关键词： ZrH ₂ ; Oleic acid ; Wet ball milling ; Surface antioxidant