水热法合成(K,Na)NbO_3陶瓷粉体及其压电性能研究  

HYDROTHERMAL SYNTHESIS OF(K,Na)NbO_3 POWDERS AND STUDY ON PIEZOELECTRIC PROPERTIES

作　　者：涂娜[1] 李小红[1] 江向平[1] 林玫[1] 陈超[1] 

机构地区：[1]景德镇陶瓷学院材料科学与工程学院江西省先进陶瓷材料重点实验室,景德镇333001

出　　处：《中国陶瓷》2011年第12期15-17,34,共4页China Ceramics

基　　金：国家自然科学基金(50862005;51062005;91022027);江西省教育厅项目(GJJ11197);江西省高等学校"先进陶瓷材料"科技创新团队;江西省主要学科学术和技术带头人培养对象计划项目([2010]224)

摘　　要：利用水热法在碱性溶液中合成了具有钙钛矿结构的(K,Na)NbO_3无铅压电陶瓷粉体,研究了初始溶液中K+的含量对产物晶相、形貌以及化学组成的影响。采用X射线衍射仪以及扫描电镜对产物的结构和形貌进行了表征,利用X荧光分析仪对粉体的化学组成进行了精确分析。实验结果表明:随着初始溶液中K^+含量的变化,有两相钙钛矿(K,Na)NbO_3粉体生成,在溶液中K^+的反应活性低于Na^+。然后,将水热合成的K_(0.58)Na_(0.42)NbO_3粉体采用传统固相烧结制备陶瓷材料,其结构较致密,压电常数d_(33)达到94 pC/N。（K,Na）NbO_3 powers with perovskite structure were successfully prepared by hydrothermal method in alkaine solution.The influence of the molar ratio of K~＋on the structure,morphology and chemical composition of the products were investigated.The phase of the powers was investigated by X-ray diffraction （XRD）,the microstructure and morphology were investigated by SEM,the chemical composition of the products was investigated by XRF.The results show that with the change of the K~＋in the starting solutio,two-phase perovskite（K,Na）NbO_ appeared,the reactivity of K~＋was less than that of Na~＋in the solution.Then,the obtained K_（0.58）Na_（0.42）NbO_3 powders were used to fabricate lead-free piezoelectric ceramics using the traditional sintering process,and its piezoelectric constant up to d_（33）=94pC/N

关 键 词：水热法 (K Na)NbO_3 压电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]