一元醇种类对溶胶-凝胶法制备铌酸钾钠粉体及陶瓷的影响  

Effects of monoalcohols on preparation of K0.5Na0.5NbO3 powders and ceramics with sol-gel method

作　　者：胡晨曦 程花蕾 阮晓煜 赵立芳 HU Chen-xi;CHENG Hua-lei;RUAN Xiao-yu;ZHAO Li-fang(College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China)

机构地区：[1]宝鸡文理学院化学化工学院,陕西宝鸡721013

出　　处：《宝鸡文理学院学报（自然科学版）》2020年第1期29-34,41,共7页Journal of Baoji University of Arts and Sciences(Natural Science Edition)

基　　金：国家自然科学基金项目(21501007)。

摘　　要：目的研究酯化剂一元醇种类对K0.5Na0.5NbO3(KNN)粉体以及对应陶瓷性能的影响。方法采用溶胶-凝胶法以一元醇∶乙二醇=1∶1为酯化剂制备KNN粉体。结果XRD结果表明不同一元醇下KNN粉体及陶瓷均具有正交相钙钛矿结构;SEM结果表明当酯化剂为乙二醇时,所获得的KNN粉体形貌清晰且具有约220 nm粒径;当酯化剂为乙二醇时,KNN陶瓷的结晶性、晶粒尺寸和致密性最佳,且在室温下具有较优的介电性能,εr=220,tanδ=0.07。结论当酯化剂为乙二醇时,有助于获得性能较优的KNN陶瓷。Purposes—To study the effects of monoalcohols,an esterifying agent,on the properties of K0.5Na0.5NbO3(KNN)powder and its ceramics.Methods—KNN powder was prepared with sol-gel method by using monohydric alcohol and ethylene glycol,the ratio of which is 1 to 1,as esterifying agent.Result—The KNN powders and ceramics are orthorhombic perovskite structure under different monoalcohols.When the esterifying agent was ethylene glycol,the obtained KNN powders have clear morphology and 220 nm particle size.When the esterifying agent was ethylene glycol,the obtained KNN ceramics have not only optimum crystallinity,grain size and compactness but also better dielectric properties at room temperature:εr=220,tanδ=0.07.Conclusion—When the esterifying agent is ethylene glycol,the obtained KNN ceramics have optimum dielectric properties.

关 键 词：铌酸钾钠 酯化剂 相结构 微观形貌 介电性能 

分 类 号：TB34[一般工业技术—材料科学与工程]