无机材料学报2012，Vol.27Issue(3)：277-280,4.DOI:10.3724/SP.J.1077.2012.00277
不同烧结工艺对K0.5Na0.5NbO3陶瓷微结构的影响
Effect of Different Sintering Processing on the Microstructure of K0.5Na0.5NbO3 Ceramics
摘要
Abstract
Lead-free K0.5Na0.5NbO3(KNN) piezoelectric ceramics were prepared by conventional solid-state reaction technique and sintered through conventional and hot-pressing sintering process respectively. The effects of sintering method and annealing temperature on the microstructure, morphology and density of KNN ceramics were investigated. The crystallographic structure of KNN ceramic was investigated by X-ray diffraction (XRD) and the fractured micro-structures of sintered ceramics were characterized by scanning electronic microscope (SEM). The results show that all specimens exhibit pure perovskite structures. However, compared with the sample prepared with conventional sintering, higher relative density (greater than 98%), smaller grain size (0.6 urn) and lower tanδ (≤2. 8%, 1 kHz) are obtained in the KNN ceramics sintered through hot-pressure sintering process, meantime various particle sizes and densities of KNN ceramics can be obtained by selecting suitable annealing temperature.关键词
热压烧结/微观结构/晶粒形貌/无铅压电陶瓷Key words
hot-pressure sintering/ microstructure/ crystal morphology/ lead-free/ piezoelectric ceramic分类
信息技术与安全科学引用本文复制引用
郭福强,张保花,王伟,陈惠敏..不同烧结工艺对K0.5Na0.5NbO3陶瓷微结构的影响[J].无机材料学报,2012,27(3):277-280,4.基金项目
新疆维吾尔自治区高校科研计划青年教师科研培育基金(XJEDU2010S46) （XJEDU2010S46）
