Abstract： To prepare excellent dielectric ceramic materials, the particle size distribution under different milling conditions were researched, using presintering powders of giant dielectric NaCu₃Ti₃NbO₁₂ ceramics as raw materials. The results show that the optimal milling conditions are that the milling time is 8 to 10 h and the mass ratio of ball and powder is (3-6):1. The particle size decreases as the milling time increases. The sintered ceramics prepared by the optimal presintering powders reveal relative dielectric permittivity of 6 000 in the frequency range of 1 to 100 kHz.

Keywords: particle size; giant dielectric ceramic; presintering powder; ball-milling condition

中图分类号：TD921         文献标志码：A

文章编号：1008-5548(2015)02-0080-03

DOI:10.13732/j.issn.1008-5548.2015.02.020

收稿日期：2014-04-08， 修回日期：2014-05-09，在线出版时间：2015-04-17。

基金项目：韶关学院应用化学重点学科项目，编号：317-317027；韶关学院科研项目，编号：SY2014KJ06。

第一作者简介：刘洋（1987—），男，硕士，助教，研究方向为压电、介电陶瓷材料及器件。 电话：18318333052，E-mail: jackboton@gmail.com。

通信作者简介：赵旭光（1960—），男，博士，教授，研究方向为工业废弃物的综合处理。 电话：13509860757，E-mail: 1053589237@qq.com。