首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
化学包覆法制备Ho3+掺杂钛酸钡基X8R细晶陶瓷
作者:黄咏安   唐振华 李丹丹 姚英邦     鲁圣国 
单位:广东省智能材料和能量转化器件工程技术研究中心 广东省软物质重点实验室 广东工业大学材料与能源学院 广州 510006 
关键词:化学包覆法 氧化钬 钛酸钡 细晶陶瓷 “核–壳”结构 
分类号:TQ174.1
出版年,卷(期):页码:2017,45(9):0-0
DOI:
摘要:

采用化学包覆法将Ho2O3包覆在纳米级钛酸钡粉体表面,通过烧结将Ho3+扩散到钛酸钡晶粒中,调节其介电性能,研究了不同Ho3+掺杂量对BaTiO3基陶瓷相组成、微观结构和介电性能的影响。X射线衍射和扫描电子显微镜分析结果表明:Ho3+改性陶瓷样品均为赝立方相,Ho3+的加入能抑制晶粒生长,改善陶瓷微观结构,有利于制备均匀的细晶陶瓷。透射电子显微镜观察显示,包覆层的厚度约为2 nm,包覆Ho2O3有助于陶瓷烧结过程中形成“核–壳”结构晶粒,能显著改善钛酸钡基陶瓷的介电温度稳定性,提高绝缘电阻。当Ho3+掺杂量为2.0%时,陶瓷的相对介电常数为1 612,ΔC/C(–55~150 ℃)<±15%,满足EIA X8R电容器的温度特性。

 
基金项目:
国家自然科学基金委–广东省联合基金(U1501246);国家自然科学基金(51372042);广东省自然科学基金重大基础研究培育项目(2015A030308004)。
作者简介:
黄咏安(1991—),男,硕士研究生。
参考文献:
[1] 李玲霞, 郭锐, 王洪茹. 多种添加剂对高压X8R介质材料的改性研究[J]. 无机材料学报, 2007, 22(4): 711–714. 
LI Lingxia, GUO Rui, WANG Hongru. J Inorg Mater(in Chinese), 2007, 22(4): 711–714.
[2] SONG Y H, HWANG J H, HAN Y H. Effects of Y2O3 on temperature stability of acceptor-doped BaTiO3[J]. Jpn J Appl Phys, 2005, 44(3): 1310–1313.
[3] HWANG J H, CHOI S K, HAN Y H. Dielectric properties of BaTiO3 codoped with Er2O3 and MgO[J]. Jpn J Appl Phys, 2001, 40(8): 4952–4955. 
[4] CHANG C Y, WANG W N, HUANG C Y. Effect of MgO and Y2O3 doping on the formation of core–shell structure in BaTiO3 ceramics[J]. J Am Ceram Soc, 2013, 96(8): 2570–2576.
[5] PARK J S, HAN Y H. Effects of MgO coating on microstructure and dielectric properties of BaTiO3[J]. J Eur Ceram Soc, 2007, 27(2): 1077–1082. 
[6] KISHI H, OKINO Y, HONDA M, et al. The effect of MgO and rare-earth oxide on formation behavior of core–shell structure in BaTiO3[J]. Jpn J Appl Phys, 1997, 36(9): 5954–5957.
[7] TIAN Zhibin, WANG Xiaohui, ZHANG Yichi, et al. Formation of core–shell structure in ultrafine-grained BaTiO3-based ceramics through nanodopant method[J]. J Am Ceram Soc, 2010, 93(1): 171–175.
[8] WANG Yan, CUI Bin, LIU Yu, et al. Fabrication of submicron La2O3-coated BaTiO3 particles and fine-grained ceramics with temperature-stable dielectric properties[J]. Scripta Mater, 2014, s 90–91(16): 49–52.
[9] BASSANO A, BUSCAGLIA V, SENNOUR M, et al. Nanocrystalline oxide (Y2O3, Dy2O3, ZrO2, NiO) coatings on BaTiO3 submicron particles by precipitation[J]. J Nanopart Res, 2010, 12(2): 623–633. 
[10] BUSCAGLIA M T, VIVIANI M, ZHAO Z, et al. Synthesis of BaTiO3 core−shell particles and fabrication of dielectric ceramics with local graded structure[J]. Chem Mater, 2006, 18(17): 4002–4010.
[11] ZHANG Yichi, WANG Xiaohui, Kim J Y, et al. High performance BaTiO3-based BME–MLCC nanopowder prepared by aqueous chemical coating method[J]. J Am Ceram Soc, 2012, 95(5): 1628–1633.
[12] LI Tao, LI Longtu, ZHAO Jianqiang, et al. Modulation effect of Mn2+ on dielectric properties of BaTiO3-based X7R materials[J]. Mater Lett, 2000, 44(1): 1–5.
[13] YAO Guofeng, WANG Xiaohui, LI Longtu. Study on occupation behavior of Y2O3 in X8R nonreducible BaTiO3-based dielectric ceramics[J]. Jpn J Appl Phys, 2011, 50(12R): 121501.
[14] KIM C H, PARK K J, YOON Y J, et al. Role of yttrium and magnesium in the formation of core–shell structure of BaTiO3 grains in MLCC[J]. J Eur Ceram Soc, 2008, 28(6): 1213–1219.
[15] ATKIN R B, FULRATH R M. Point defects and sintering of lead zirconate–titanate[J]. J Am Ceram Soc, 2006, 54(5): 265–270.
[16] ZHANG Baolin, WU Shunhua. Effect of calcinating temperature and Mn doping on dielectric properties of temperature–stable BaTiO3-based X8R ceramics[J]. Int J Appl Ceram Technol, 2013, 10(s1): E57–E63.
[17] YAO Guofeng, WANG Xiaohui, ZHANG Yichi, et al. Nb-modified 0.9BaTiO3–0.1(Bi0.5Na0.5)TiO3 ceramics for X9R high–temperature dielectrics application prepared by coating method[J]. J Am Ceram Soc, 2012, 95(11): 3525–3531.
[18] PARK Y, KIM Y H, KIM H G. The effect of grain size on dielectric behavior of BaTiO3 based X7R materials[J]. Mater Lett, 1996, 28(1/3): 101–106.
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com