Nb2O5含量对Na2O-PbO-Nb2O5-SiO2玻璃陶瓷体系晶化过程和介电性能的影响

稀有金属, 2008, 32(4): 468-472. doi: 10.3969/j.issn.0258-7076.2008.04.015

Nb2O5含量对Na2O-PbO-Nb2O5-SiO2玻璃陶瓷体系晶化过程和介电性能的影响

高健 ^1, , 毛昌辉 ^2, , 唐群 ^3, , 杜军 ^4, , 李宏涛 ^5, , 章林文 ^6,

1.北京有色金属研究总院先进电子材料研究所,北京,100088

2.北京有色金属研究总院先进电子材料研究所,北京,100088

3.北京有色金属研究总院先进电子材料研究所,北京,100088

4.北京有色金属研究总院先进电子材料研究所,北京,100088

5.中国工程物理研究院流体物理研究所,四川,绵阳,621900

6.中国工程物理研究院流体物理研究所,四川,绵阳,621900

关键词：玻璃陶瓷 , 可控结晶 , 介电性能

Effects of Nb2O5 Content on Crystallization and Dielectric Properties of Na2O-PbO-Nb2O5-SiO2 Glass-Ceramic

采用熔炼-快速冷却工艺及可控结晶技术制备Na2O-PbO-Nb2O5-SiO2系玻璃陶瓷.采用DTA、 XRD、介电性能测试等手段, 分析了Nb2O5含量对Na2O-PbO-Nb2O5-SiO2玻璃陶瓷体系晶化过程和介电性能的影响.结果表明, 结晶温度为750～900 ℃时, 该体系主要形成的晶相为Pb2Nb2O7, NaNbO3和PbNb2O6相.在800 ℃以下结晶处理, Nb2O5含量的增加会抑制体系中NaNbO3相的出现, 使得介电常数随Nb2O5含量的增加而降低;在800 ℃以上结晶处理, Nb2O5含量的增加会促进体系中PbNb2O6相的生成, 同时可能使得体系中玻璃相含量降低, 导致介电常数随Nb2O5含量的增加而升高.

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