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硅酸盐通报 ›› 2017, Vol. 36 ›› Issue (11): 3659-3663.

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B2O3掺杂对α-CaSiO3/Al2O3陶瓷低温烧结及微波介电性能的影响

崔向红;耿振华   

  1. 山东工商学院国际教育学院,烟台,264005;山东工业陶瓷研究设计院有限公司,淄博,255000
  • 出版日期:2017-11-15 发布日期:2021-01-18

Effect of B2O3 Doping on Low Temperature Sintering and Microwave Dielectric Properties of α-CaSiO3/Al2O3 Ceramics

CUI Xiang-hong;GENG Zhen-hua   

  • Online:2017-11-15 Published:2021-01-18

摘要: 通过传统固相法制备了α-CaSiO3/Al2O3-B2O3微波介质陶瓷,研究了不同B2 O3添加量对α-CaSiO3/Al2O3陶瓷烧结特性、相组成及微波介电性能的影响,通过XRD、SEM和网络分析仪对其相结构、微观形貌和微波介电性能进行了表征.结果表明:B2 O3的添加使陶瓷的烧结温度从1375℃降低到了1100℃,并使主晶相由α-CaSiO3相变为β-CaSiO3相;当B2 O3的添加量为3wt%时,在1100℃烧结2 h可获得最佳微波介电性能:εr=6.21,Q×f=30471 GHz,τf=-34.58 ppm/℃.

关键词: CaSiO3;微波介质陶瓷;相变;低温烧结

Abstract: α-CaSiO3/Al2O3-B2O3 microwave dielectric ceramics were prepared by conventional solid-state reaction method. The effect of B2O3 additives on the sintering behavior, phase composition, microstructure,and microwave dielectric properties was investigated by X-ray diffraction,scanning electron microscopy and network analysis,respectively. The results reveal that B2O3 additives can not only lower the sintering temperature from 1375 ℃ to 1100 ℃,but also transfer major phase composition from α-CaSiO3 to β-CaSiO3 . The optimal microwave dielectric properties of ceramics sintered at 1100 ℃for 2 h (εr =6. 21,Q × f=30471 GHz,τf = -34. 58 ppm/℃)are obtained when the proportion of B2O3 additives was 3wt%.

Key words: CaSiO3;microwave dielectric ceramic;phase transition;low temperature sintering

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