The synthesis and microwave dielectric properties of Mg3B2O6 and Mg2B2O5 ceramics

被引：82
作者：
Dosler, Urban [1 ]
Krzmanc, Marjeta Macek [1 ]
Suvorov, Danilo [1 ]
机构：
[1] Jozef Stefan Inst, Ljubljana 1000, Slovenia
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 02期
关键词：
Calcination; Dielectric properties; Grain growth; Grain size; Substrate; CAO-B2O3-SIO2; GLASS-CERAMICS; SYSTEM; CRYSTALLIZATION; DENSIFICATION; TEMPERATURE; NANOWIRES; MECHANISM;
D O I：
10.1016/j.jeurceramsoc.2009.05.049
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：
Single-phase Mg3B2O6 and Mg2B2O5 ceramics were synthesized and then structurally and dielectrically characterized. The highest Qxf value of 230,900 GHz was obtained for a Mg3B2O6 ceramic with a density of 97% and 1000-mu m grains. Considerably lower Qxf values (10,000-32,000 GHz) were determined for the Mg2B2O5 ceramic. Mg3B2O6 and Mg2B2O5 exhibited permittivities (epsilon) of 7.2 and 6.2-7.0, respectively. Both ceramics showed negative temperature coefficients of resonant frequency (tau(f)) of -18 to -45 ppm/degrees C. (C) 2009 Elsevier Ltd. All rights reserved.
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页码：413 / 418
页数：6
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