Dielectric and microwave properties of ZrO2 doped CaO–SiO2–B2O3 ceramic matrix composites
Dielectric and microwave properties of ZrO2 doped CaO–SiO2–B2O3 ceramic matrix composites
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DOI：
10.1016/j.jallcom.2010.11.048
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发表时间：
2011-03
影响因子：
6.2
通讯作者：
M. He;Shuren Zhang;Xiaohua Zhou;Bo Li;Jing Wan
中科院分区：
文献类型：
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作者：
M. He;Shuren Zhang;Xiaohua Zhou;Bo Li;Jing Wan
研究了添加ZrO 2的CaO-SiO2-B2 O3陶瓷基复合材料的介电性能和微波性能随烧结温度的变化规律。结果表明，ZrO 2的加入有利于提高陶瓷的介电性能和微波性能。X射线衍射（XRD）结果表明，在950°C ~ 1050°C温度范围内，产物主要为β-CaSiO 3晶相和少量SiO2相。当ZrO 2含量为0.5wt%时，在1000°C烧结的CaO-SiO2-B2 O3陶瓷基复合材料具有良好的介电性能：介电常数r=5.85，介电损耗因子tanδ=1.59×10−4（1 MHz），微波性能：介电常数r=5.52，介电损耗因子Q·f=28, 487 GHz（11.11GHz）。Zr掺杂的CaO-SiO2-B2 O3陶瓷基复合材料的介电常数表现出非常小的温度依赖性，在−50至150°C的温度范围内小于±2%。此外，ZrO_2掺杂的CaO-SiO_2-B_2O_3陶瓷基复合材料在20 ~ 1 MHz的宽频率范围内具有低于5.5的低介电常数。
The behavior of dielectric and microwave properties against sintering temperature has been carried out on CaO–SiO2–B2O3ceramic matrix composites with ZrO2addition. The results indicated that ZrO2addition was advantageous to improve the dielectric and microwave properties. X-ray diffraction (XRD) patterns show that the major crystalline β-CaSiO3and a little SiO2phase existed at the temperature ranging from 950°C to 1050°C. At 0.5wt% ZrO2, CaO–SiO2–B2O3ceramic matrix composites sintered at 1000°C possess good dielectric properties: ɛr=5.85, tanδ=1.59×10−4(1MHz) and excellent microwave properties: ɛr=5.52, Q·f=28,487GHz (11.11GHz). The permittivity of Zr-doped CaO–SiO2–B2O3ceramic matrix composites exhibited very little temperature dependence, which was less than ±2% over the temperature range of −50 to 150°C. Moreover, the ZrO2-doped CaO–SiO2–B2O3ceramic matrix composites have low permittivity below 5.5 over a wide frequency range from 20Hz to 1MHz.