硅酸盐学报

锡钛酸钡BaSnxTi1–xO3 厚膜陶瓷的大电卡效应

作者：李江路标李丹丹姚英邦梁波陶涛鲁圣国

单位：广东省功能软凝聚态物质重点实验室广东工业大学材料与能源学院

关键词：电卡效应流延法厚膜陶瓷锡钛酸钡

分类号：TQ174

出版年,卷(期):页码：2018,46(9):0-0

DOI：10.14062/j.issn.0454-5648.2018.09.01

摘要：

对无铅铁电材料锡钛酸钡(Ba(SnxTi1–x)O3(BSnT))(x=5%，10%，15%，20%，摩尔比)陶瓷进行了研究，利用流延法

得到锡钛酸钡膜带，采用X 射线衍射技术对烧结后的厚膜陶瓷进行结构分析，利用扫描电子显微镜分析了样品形貌，测量

了样品介温关系和电滞回线，并利用Maxwell 关系对电卡效应进行了计算。结果表明：厚膜陶瓷BSnT 在不同的Sn4+掺杂量

下的电卡效应有明显的差异，在x=0.05 及外加电场10 MV/m 时，绝热温变(ΔT)可达到2.1 K，且x=0.05 的样品在5 MV/m 的

电卡效率最高达到0.24×106 K·m·V–1。无铅铁电陶瓷拥有大的电卡效应可望在制冷器件上作为制冷剂使用。

Lead-free ferroelectric materials of Sn4+ ions doped barium titanate (BaxSn1–xTiO3 (BSnT)) with Sn4+ ionic contents of 5%,

10%, 15%, and 20% (in mole fraction) were prepared, and the thick film ceramics were fabricated by a tape casting method. The

microstructure of the BSnT ceramics after sintering was characterized by X-ray diffraction. The morphologies of the ceramics were

analyzed by scanning electron microscopy. The dielectric constant and loss as a function of temperature, and the hysteresis loop as a

function of electric field and temperature were measured. The electrocaloric effect (ECE) was calculated based on the Maxwell

equations. The results indicate that the electrocaloric effect of the thick film ceramics is affected by Sn4+ ionic content. As x=0.05, ΔT

can reach 2.1 K when E=10 MV/m. The maximum elctrocaloric efficiency is up to 0.24×10–6 K·m·V–1 when E=5 MV/m for the

composition as x=0.05. The lead-free ceramics with the great ECE have a promising potential application as a refrigerant in the future

cooling devices.

基金项目：

国家自然科学基金(51372042)；国家自然科学基金–广东省联合基金(U1501246)；广东省自然科学基金重大基础研究培育项目(2015A030308004)；广东省教育厅重大基础研究培育项目(2014GKXM039)资助。

作者简介：

鲁圣国广东工业大学材料与能源学院教授，博士生导师，智能材料与能量转化器件工程技术研究中心主任。IEEE 高级会员，IEEE 北京分部创会高级会员，中国物理学会电介质专业委员会委员，中国复合材料学会介电高分子复合材料及应用专业委员会常务委员，国际刊物International Journal of Metallurgical & Materials Engineering，IET Nanodielectrics 的编委。曾在香港理工大学应用物理系和材料研究中心、香港城市大学物理和材料科学系、美国宾州州立大学材料研究所从事研究工作。目前主持国家自然科学基金委-广东省联合基金、国家自然科学基金面上项目、广东省自然科学基金重大基础研究培育项目、广东省教育厅重大基础研究培育项目。在Science、Advanced Materials, Advanced Functional Materials, Journal of Materials Chemistry C, ACS Applied Materials and Interface，Physics Review B 等国际刊物和国际会议发表论文146 篇，其中SCI 收录97 篇，获得授权中国专利3 项、美国专利公开1 项、世界专利（PCT）公开1 项、中国专利公开23 项。主要研究方向为智能材料和器件，能量储存、转换材料和器件。

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