Ba(Fe0.5Nb0.5)O3基复相陶瓷的制备与介电性能
Preparation and Dielectric Property of Ba(Fe0.5Nb0.5)O3 Based Composite Ceramic
摘 要
采用粉末烧结法制备了添加不同质量分数(10%～40%)玻璃的Ba(Fe0.5Nb0.5)O3基复相陶瓷, 利用X射线衍射仪、扫描电镜、阻抗测试仪等研究了其微观结构和介电性能。结果表明:该复相陶瓷的主晶相为立方钙钛矿结构的Ba(Fe0.5Nb0.5)O3相, 随着玻璃添加量的增加, 复相陶瓷的晶粒尺寸逐渐减小,孔隙率降低; 不同玻璃含量复相陶瓷均具有良好的介电性能,其相对介电常数和介电损耗角正切均随玻璃添加量的增加而降低;添加40%玻璃的复相陶瓷击穿场强最大, 为296 kV·cm-1, 添加10%玻璃的储能密度最大, 为1.324 J·cm-3, 晶界相对改善Ba(Fe0.5Nb0.5)O3基复相陶瓷的击穿场强起主要作用。
Ba(Fe0.5Nb0.5)O3
BaO-B2O3-SiO2-TiO2玻璃
介电性能
composite ceramic
Ba(Fe0.5Nb0.5)O3
BaO-B2O3-SiO2-TiO2 glass
dielectric property
Abstract
The Ba(Fe0.5Nb0.5)O3 based composite ceramics with various glass content (10wt%-40wt%) were prepared by the powder sintering method. The microstructures and dielectric properties of the composite ceramics were investigated by the X-ray diffractometer, scanning electron microscope and impedance analyzer. The results show that the major phase of the composite ceramics was Ba(Fe0.5Nb0.5)O3 phase with cubic crystal structure. With the increase of the glass content, the grain sizes and porosities of the composite ceramics decreased gradually. The dielectric properties of the composite ceramics with different glass content were all excellent. The relative dielectric constant and tangent of dielectric loss angle both decreased with the increase of glass content. The breakdown strength of the composite ceramic with 40wt% glass reached the highest value of 296 kV·cm-1, while the energy storage density with 10wt% glass was the highest of 1.324 J·cm-3. The grain boundary phase plays an important role in improving the breakdown strength of Ba(Fe0.5Nb0.5)O3 based composite ceramics.
中图分类号 TB33 DOI 10.11973/jxgccl201606013
所属栏目 新材料 新工艺
基金项目 国家自然科学基金资助项目(51372144, 51572160); 中国博士后科学基金资助项目(2015M572515); 陕西省教育厅专项基金资助项目(14JK1080); 陕西科技大学研究生创新基金资助项目
收稿日期 2015/11/26
修改稿日期 2016/4/22
网络出版日期
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备注房明瑞(1990-), 女, 河南洛阳人, 硕士研究生。
引用该论文: FANG Ming-rui,WANG Zhuo,LI Hai-juan,WANG Chun. Preparation and Dielectric Property of Ba(Fe0.5Nb0.5)O3 Based Composite Ceramic[J]. Materials for mechancial engineering, 2016, 40(6): 59～64
房明瑞,王卓,李海娟,王春. Ba(Fe0.5Nb0.5)O3基复相陶瓷的制备与介电性能[J]. 机械工程材料, 2016, 40(6): 59～64
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参考文献
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【4】LIU Y Y,CHEN X M,LIU X Q,et al.Giant dielectric response and relaxor behaviors induced by charge and defect ordering in Sr(Fe1/2Nb1/2)O3 ceramics［J］.Applied Physics Letters,2007,90(19):192905.
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【6】PRAKASH B S,VARMA K B R.Effect of the addition of B2O3 and BaO-B2O3-SiO2 glasses on the microstructure and dielectric properties of giant dielectric constant material CaCu3Ti4O12［J］.Journal of Solid State Chemistry,2007,180:1918-1927.
【7】YOUNG A,HILMAS W G,ZHANG S C,et al.Effect of liquid-phase sintering on the breakdown strength of barium titanate［J］.Journal of the American Ceramic Society,2007,90(5):1504-1510.
【8】MARCHIN L,GUILLEMET-FRITSCH S,DURAND B.Grain growth-controlled giant permittivity in soft chemistry CaCu3Ti4O12 ceramics［J］.Journal of the American Ceramic Society,2008,91(2):485-489.
【9】ZHANG Y,HUANG J,MA T,et al.Sintering temperature dependence of energy-storage properties in (Ba,Sr)TiO3 glass-ceramics［J］.Journal of the American Ceramic Society,2011,94(6):1805-1810.
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