Microwave dielectric properties of Ca0.6La0.8/3TiO3- Li0.5Sm0.5TiO3 system ceramics

被引：0
作者：
机构：
[1] Key Laboratory of Information Materials of Guangxi, Guilin University of Electronic Technology, Guilin 541004, Guangxi
[2] Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin 541004, Guangxi
来源：
Yang, Y. (cloud58@guet.edu.cn) | 1600年 / Chinese Ceramic Society卷 / 42期
关键词：
Complex perovskite; Dielectric properties; Microwave ceramics;
D O I：
10.7521/j.issn.0454-5648.2014.04.05
中图分类号：
学科分类号：
摘要：
Microwave dielectric ceramics of xCa0.6La0.8/3TiO3-(1-x) (Li0.5Sm0.5)TiO3 (CLT-LST) were prepared by a conventional solid-state reaction method. The phases, microstructures, surface topologies and dielectric properties of the microwave ceramics were analyzed. The increase of Ca0.6La0.8/3TiO3 content leads to a slight shift of diffraction peak toward low angles. The composition of microwave dielectric ceramic has an effect on the performance. The CLT-LST microwave dielectric properties change with the x value. The dielectric constant, εr, increases with increasing x from 0.2 to 0.6. The optimum dielectric constant εr is between 0.4 to 0.6. The quality factor (Q·f) firstly increases and then decreases rapidly, and the temperature coefficient of resonant frequency (τf) gradually changes from negative to positive. The 0.4Ca0.6La0.8/3TiO3-0.6 (Li0.5Sm0.5)TiO3 ceramic sintered at 1 250°C for 4 h exhibits the superior microwave dielectric properties (i.e., εr=125, Q·f=2680 GHz and τf=7.0×106/°C).
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页码：448 / 452
页数：4
相关论文
共 12 条
[1]  
Yang H., Zhang Q.L., Wang J.B., Et al., J Chin Ceram Soc, 31, 10, pp. 965-980, (2003)
[2]  
Song Y., Wang F.P., Zhou Y., Mater Sci Technol, 6, 2, pp. 51-64, (1998)
[3]  
Wang H., Chen W., Liu T., J Chin Ceram Soc, 32, 7, pp. 880-883, (2004)
[4]  
Kell R.C., Greenham A.C., Olds G.C.E., High-permittivity temperature-stable ceramics dielectrics with low microwave loss, J Am Ceram Soc, 56, 7, pp. 352-354, (1973)
[5]  
Hang C.L., Tsai J.T., Chen Y.B., Dielectric properties of (l-y) Ca<sub>1-x</sub>TiO<sub>3</sub>-y(Li, Nd)<sub>1/2</sub>TiO<sub>3</sub> ceramics system at microwave frequency, Mater Res Bull, 36, 3-4, pp. 547-556, (2001)
[6]  
Yoshida M., Hara M.N., Takada T., Et al., Structure and dielectric properties of Ca<sub>1-x</sub>Nd2<sub>x/3</sub>Ti0<sub>3</sub>, JPn J Appl Phys, 36, pp. 6818-6823, (1997)
[7]  
Kim W.S., Kim E.S., Yoon K.H., Effects of Sm<sup>3+</sup> substitution on dielectric properties or of Ca(1-x)Sm<sub>2x/3</sub>TiO<sub>3</sub> ceramics at microwave frquencies, J Am Ceram Soc, 82, 8, pp. 2111-2115, (1999)
[8]  
Huang C., Tsai J.T., Chen Y., Dielectric properties of (1-y) Ca<sub>1-x</sub>La<sub>2x/3</sub>TiO<sub>3</sub>-y(Li, Nd)<sub>1/2</sub>TiO<sub>3</sub> ceramic system at microwave frequency, Mater Res Bull, 36, pp. 547-556, (2001)
[9]  
Ubic R., Reaney I.M., Lee W.E., Microwave dielectric solid-solution phase in system BaO-Ln<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>(Ln=Lanthanide caution), Int Mater Rev, 43, 5, pp. 205-219, (1998)
[10]  
Kim E.S., Yoon K.H., Microwave dielectric properties of (1-x)CaTiO<sub>3</sub>-xLi<sub>1/2</sub> Sm<sub>1/2</sub>TiO<sub>3</sub> ceramics, J Eur Ceram Soc, 24, 14, pp. 2397-2410, (2003)
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