CAJ | 학술논문

作为一种主要的无铅压电陶瓷材料,Bi_(0.5)Na_(0.5)TiO_3(BNT)是一种优良的候选材料.以钛酸四丁酯、五水硝酸铋和无水乙酸钠为原料,用溶胶-凝胶法制备出清澈透明的BNT凝胶;BNT干凝胶经煅烧可得到BNT细粉.XRD谱线表明,其中主要含有杂相Bi_(12)TiO_(20).随着温度的升高,杂相的强度逐渐降低;同时,由于温度的升高,BNT粉体的晶粒增大.XRD指标化后的结果表明,BNT粉体的(101)晶面的原子排列的有序度较好.
작위일충주요적무연압전도자재료,Bi_(0.5)Na_(0.5)TiO_3(BNT)시일충우량적후선재료.이태산사정지、오수초산필화무수을산납위원료,용용효-응효법제비출청철투명적BNT응효;BNT간응효경단소가득도BNT세분.XRD보선표명,기중주요함유잡상Bi_(12)TiO_(20).수착온도적승고,잡상적강도축점강저;동시,유우온도적승고,BNT분체적정립증대.XRD지표화후적결과표명,BNT분체적(101)정면적원자배렬적유서도교호.
Bismuth sodium titanate [Bi_(0.5)Na_(0.5)TiO_3, BNT] is considered to be an excellent candidate for a key material of lead-free piezoelectric ceramics. The clear and transparent gels of BNT can be prepared using tetrabutyl titanate, bismuth nitrate pentahydrate and sodium acetate anhydrous as starting materials by Sol-gel method, the BNT fine powders are produced after the dry gels are calcined. XRD patterns show that the second phase in BNT powders is Bi_(12)TiO_(20). With the temperature increasing, the intensity of the Bi_(12)TiO_(20) reduces and the grain size of BNT powders increases. Well-ordered atoms on (101) crystal plane of the powders are formed by characterization of XRD results.