纳米钛酸钡浆料及流延成型制备与性能研究  

Study on the preparation and properties of nano-sizedbarium titanate slurry and tape casting

作　　者：黄涛 徐华蕊[1] 赵昀云[1] 许凤 徐堃 冯中军 邓最亮 朱归胜[1] HUANG Tao;XU Huarui;ZHAO Yunyun;XU Feng;XU Kun;FENG Zhongjun;DENG Zuiliang;ZHU Guisheng(Engineering Research Center of Ministry of Education of Electronic Information Materials and Devices,Guangxi Key Laboratory of Information Materials,School of Materials and Engineering,Guilin University of Electronic Science and Technology,Guilin 541004,China;Shanghai Sunrise Polymer Material Co.,Ltd.,Shanghai 200231,China)

机构地区：[1]桂林电子科技大学材料科学与工程学院,电子信息材料与器件教育部工程研究中心,广西信息材料重点实验室,广西桂林541004 [2]上海三瑞高分子材料股份有限公司,上海200231

出　　处：《功能材料》2024年第11期11084-11089,共6页Journal of Functional Materials

基　　金：广西科技计划项目(桂科AD23023013,桂科AB23075218);桂林市科学研究与技术开发计划项目(20220120-1);电子信息材料与器件教育部工程研究中心重点基金项目(EIMD-AA202001);广西电子信息材料构效关系重点实验室重点基金(201002-Z);上海三瑞高分子材料股份有限公司委托项目(CD23028X)。

摘　　要：MLCC超薄介质的发展,对钛酸钡纳米粉体的分散性提出了新的挑战,纳米钛酸钡的尺寸效应、表面效应等因素又制约了粉体的分散。以平均粒径为100 nm钛酸钡为原料,通过研究不同球磨条件对粉体分散性的影响,获得了分散性优良的浆料,并经过流延、叠层、烧结、披银后测量介电性能。结果表明,通过提高粉体在溶剂中的分散性进而获得了分散性良好的钛酸钡浆料,由此流延所得生坯具有良好的均匀性和流延适应性,经烧结后的钛酸钡陶瓷介电常数达到了6311,比商用亚微米级钛酸钡粉体所得陶瓷的介电常数提高了35%,为后续100 nm钛酸钡粉体工业化制备MLCC提供了参考。The development of ultra-thin dielectrics for MLCCs has presented novel challenges in terms of the dispersion of barium titanate nano-powders.However,the dispersion of the powder is constrained by the size effect of barium titanate nanoparticles,surface effect and other related limiting factors.The present study utilized barium titanate with an average particle size of 100 nm as the raw material.By investigating the impact of various ball milling conditions on powder dispersion,a slurry with exceptional dispersion was obtained.Subsequently,this slurry was processed into ceramics through tape casting,laminating,and sintering techniques,followed by measurement of its dielectric properties.The results demonstrate that the 100 nm barium titanate slurry,achieved through improved powder dispersibility in the solvent,exhibits excellent dispersion.The green tape made from tape casting this slurry demonstrated excellent uniformity and adaptability to tape cast.Furthermore,sintered barium titanate ceramics exhibited a significantly higher dielectric constant of 6311,representing a 35%increase compared to ceramics produced from commercially available submicron-grade barium titanate powders.The findings of this study serve as a valuable reference for the subsequent utilization of 100 nm barium titanate nano-powder in the industrial production of MLCCs.

关 键 词：纳米钛酸钡 流延成型 钛酸钡浆料 粉体分散 

分 类 号：TB34[一般工业技术—材料科学与工程]