Structure Evolution and Enhanced Microwave Dielectric Characteristics of (Sr1 - xCax)La2Al2O7 Ceramics

被引：24

作者：

Yi, Lei ^{[1
]}

Li, Lei ^{[1
]}

Liu, Xiao Qiang ^{[1
]}

Chen, Xiang Ming ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Lab Dielect Mat, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2014年 / 97卷 / 11期

基金：

中国国家自然科学基金;

关键词：

CA-SUBSTITUTION; SM; ND; TEMPERATURE; IMPROVEMENT; OXIDES;

D O I：

10.1111/jace.13145

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(Sr1-xCax)La2Al2O7 (0.1x0.5) ceramics were prepared by a standard solid-state reaction method. Their densification behavior and microwave dielectric properties were investigated together with the structural evolution. X-ray diffraction analysis indicated that the major phase of Ruddlesden-Popper structure with n=2 was obtained for all the compositions investigated here. Partial Ca substitution improved the sintering behavior of SrLa2Al2O7 ceramics. More importantly, microwave dielectric characteristics were enhanced in (Sr1-xCax)La2Al2O7 ceramics with compositions of x=0.1-0.3. The stacking fault was confirmed by TEM observation in the present ceramics, and the microwave dielectric loss was influenced by it. The best combination of microwave dielectric characteristics was achieved for the composition of x=0.1: epsilon(r) = 19.9, Qf=135400GHz and (f)=-18.5ppm/degrees C.

引用

页码：3531 / 3536

页数：6

共 28 条

[1] POSSIBLE HIGH-TC SUPERCONDUCTIVITY IN THE BA-LA-CU-O SYSTEM [J].

BEDNORZ, JG ;

MULLER, KA .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 64 (02) :189-193

[2] Microwave dielectric properties and applications of rare-earth aluminates [J].

Cho, SY ;

Kim, IT ;

Hong, KS .

JOURNAL OF MATERIALS RESEARCH, 1999, 14 (01) :114-119

[3] Complex-permittivity measurement on high-Q materials via combined numerical approaches [J].

Fan, XC ;

Chen, XM ;

Liu, XQ .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2005, 53 (10) :3130-3134

[4] Structural dependence of microwave dlielectric properties of SrRAIO4 (R = Sm, Nd, La) ceramics:: Crystal structure refinement and infrared reflectivity study [J].

Fan, Xie Cheng ;

Chen, Xiang Ming ;

Liu, Xiao Qiang .

CHEMISTRY OF MATERIALS, 2008, 20 (12) :4092-4098

[5] Microstructural engineering of microwave dielectric ceramics [J].

Freer, R. ;

Azough, F. .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2008, 28 (07) :1433-1441

[6]

Hakki BW., 1960, IEEE. Trans. MTT, DOI DOI 10.1109/TMTT.1960.1124749

[7] Recent progress on the dielectric properties of dielectric resonator materials with their applications from microwave to optical frequencies [J].

Higuchi, Y ;

Tamura, H .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2003, 23 (14) :2683-2688

[8]

Kaijfez D., 1998, DIELECTRIC RESONATOR

[9]

Kim DW, 2001, J AM CERAM SOC, V84, P1286

[10] Exploiting dimensionality and defect mitigation to create tunable microwave dielectrics [J].

Lee, Che-Hui ;

Orloff, Nathan D. ;

Birol, Turan ;

Zhu, Ye ;

Goian, Veronica ;

Rocas, Eduard ;

Haislmaier, Ryan ;

Vlahos, Eftihia ;

Mundy, Julia A. ;

Kourkoutis, Lena F. ;

Nie, Yuefeng ;

Biegalski, Michael D. ;

Zhang, Jingshu ;

Bernhagen, Margitta ;

Benedek, Nicole A. ;

Kim, Yongsam ;

Brock, Joel D. ;

Uecker, Reinhard ;

Xi, X. X. ;

Gopalan, Venkatraman ;

Nuzhnyy, Dmitry ;

Kamba, Stanislav ;

Muller, David A. ;

Takeuchi, Ichiro ;

Booth, James C. ;

Fennie, Craig J. ;

Schlom, Darrell G. .

NATURE, 2013, 502 (7472) :532-+

← 1 2 3 →