非水解溶胶-凝胶法合成Ba_(1-x)Sr_(x)TiO_(3)粉体的研究  

Synthesis of Ba_(1-x)Sr_(x)TiO_(3)Powders by Nonhydrolytic Sol-gel Method

作　　者：江峰 张俊雄 张戎驰 李文 尹丽 韦土月 罗统斌 冯果 刘健敏 JIANG Feng;ZHANG Jun-xiong;ZHANG Rong-chi;LI Wen;YIN Li;WEI Tu-yue;LUO Tong-bin;FENG Guo;LIU Jian-min(School of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,China;Technical center of Guangxi Sanhuan Enterprise Group Co.,Ltd.,Beiliu 537400,China;National Engineering Research Center for Domestic&Builing Ceramics,Jingdezhen Ceramic University,Jingdezhen 333001,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院,景德镇333403 [2]广西三环企业集团股份有限公司技术中心,北流537400 [3]景德镇陶瓷大学国家日用及建筑陶瓷工程技术研究中心,景德镇333001

出　　处：《中国陶瓷》2024年第5期13-20,共8页China Ceramics

基　　金：国家自然科学基金(5226200352072162,51962014);江西省科技计划项目(20202ACBL241006,20202ACBL241008);江西省教育厅项目(GJJ211308);景德镇科技计划项目(20202GYZD013-014、20224GY008-07);景德镇陶瓷大学大学生创新创业训练计划项目(202210408009)。

摘　　要：以乙酸钡为钡源、乙酸锶为锶源、钛酸丁酯为钛源、丙三醇为溶剂,通过非水解溶胶-凝胶法合成Ba_(1-x)Sr_(x)TiO_(3)粉体。借用XRD、SEM等测试手段,系统探讨了Ba∶Sr∶Ti比对Ba_(1-x)Sr_(x)TiO_(3)粉体合成的影响,并研究了Ba_(0.6)Sr_(0.4)TiO_(3)粉体的烧结性能。结果表明:当Ba∶Sr∶Ti比分别为0.5∶0.5∶1.2、0.6∶0.4∶1.2、0.7∶0.3∶1.3和0.8∶0.2∶1.4时,可制得Ba_(0.5)Sr_(0.5)TiO_(3)、Ba_(0.6)Sr_(0.4)TiO_(3)、Ba_(0.7)Sr_(0.3)TiO_(3)、Ba_(0.8)Sr_(0.2)TiO_(3)的纯相粉体。随着锶含量的逐渐减少,Ba_(1-x)Sr_(x)TiO_(3)的衍射峰强度是逐渐减弱的,表明锶的取代降低了Ba_(1-x)Sr_(x)TiO_(3)的结晶度。根据XRD精修结果,发现Ba_(1-x)Sr_(x)TiO_(3)粉体中随着锶含量的增多,晶格常数和晶胞体积均减少,Ba-O键和Ti-O键键长也均减少。优选添加分散剂吐温60改善了粉体的分散性,获得了一次粒径约为50 nm,D_(50)为0.366μm的钛酸锶钡超细粉体。In this paper,Ba_(1-x)Sr_(x)TiO_(3)powder was synthesized by a nonhydrolytic sol-gel method using barium acetate as barium source,strontium acetate as strontium source,butyl titanate as titanium source and glycerol as solvent.Employing testing methods such as XRD and SEM,the influence of the Ba∶Sr∶Ti ratio on the synthesis of Ba_(1-x)Sr_(x)TiO_(3)powder was systematically investigated,and the sintering performance of Ba_(0.6)Sr_(0.4)TiO_(3)powder was also studied.The results showed that pure phase powders of Ba_(0.5)Sr_(0.5)TiO_(3),Ba_(0.6)Sr_(0.4)TiO_(3),Ba_(0.7)Sr_(0.3)TiO_(3),and Ba_(0.8)Sr_(0.2)TiO_(3)could be prepared when the Ba∶Sr∶Ti ratios were 0.5∶0.5∶1.2,0.6∶0.4∶1.2,0.7∶0.3∶1.3,and 0.8∶0.2∶1.4,respectively.As the strontium content gradually decreases,the diffraction peak intensity of Ba_(1-x)Sr_(x)TiO_(3)gradually weakens,indicating that the substitution of strontium reduces the crystallinity of Ba_(1-x)Sr_(x)TiO_(3).According to the XRD refinement results,it was found that with the increase of strontium content in Ba_(1-x)Sr_(x)TiO_(3)powder,both the lattice constant and cell volume decreased,and Ba-O and Ti-O bonds length also decreased.The optimal addition of dispersant Tween 60 improves the dispersion of the powders,resulting in ultrafine barium strontium titanate powders with the original particle size of about 50 nm and D_(50)of 0.366μm are finally obtained.

关 键 词：钛酸锶钡 粉体 分散 非水解溶胶-凝胶法 

分 类 号：TQ132.35[化学工程—无机化工]