Fabrication and Growing Kinetics of Highly Dispersed Gadolinium Zirconate Nanoparticles

• 作者: Chunming Deng Jianpeng Zou Jie Mao Min Liu Renbo Zhu Wenlong Chen Xiaofeng Zhang
• 来源期刊: 材料科学与应用(英文)
• 学科: 化学
• 关键词: GADOLINIUM ZIRCONATE CO-PRECIPITATION method Phase structure KINETICS Dispersed NANOPARTICLES
• 年，卷（期）: 2019,（1）
• 页码范围: 28-34
• 页数: 7页
• 分类号: O64

摘要

Highly dispersed gadolinium zirconate(GZ)nanoparticles with fluorite structure were successfully synthesized by co-precipitation method,and their phase composition and microstructure,formation mechanism,and grain growth kinetics were investigated.The results suggest that the nanoparticles were obtained through hydroxide dehydration and solid phase reaction.High dispersion was accomplished by ethanol solvent to reduce the hydrogen bond and sodium dodecyl benzene sulfonate(SDBS)surfactant to increase the electrostatic repulsion between the nanoparticles.The grain growth activation energy of GZ powders calcined at lower temperature(<1200°C)is 86.5 kJ/mol(Ql),and the grain growth activation energy of GZ powders calcined at higher temperature(>1200°C)is 148.4 kJ/mol(Qh).The current study shows that the optimal process to synthesize dispersed GZ nanoparticles includes ethanol solvent,3 wt.%SDBS surfactant,and 1100°C as calcining temperature.