| 低温烧结NaBi(WO4)2陶瓷的介电性能 |
| Dielectric properties of low-temperature sintered NaBi(WO4)2 ceramics |
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| 摘要: 采用固相合成法制备了NaBi (WO4)2(NBW)陶瓷，研究了NBW陶瓷的相结构、形貌、烧结特性和微波介电性能。NBW陶瓷在625~800℃烧结1~4 h能够致密化。X射线衍射表明在625~800℃烧结2 h的NBW陶瓷均为四方晶系白钨矿结构的单相陶瓷。随着烧结温度的提高，NBW陶瓷的介电常数、品质因数(Qf值)先增加后降低，谐振频率温度系数逐渐降低。经650℃烧结2 h获得的NBW陶瓷的介电常数为14.36，Qf值为16 503 GHz，谐振频率温度系数为-1.055×10-5℃-1。NBW陶瓷与银共烧反应生成Ag2W2O7相，而与Au、Al共烧具备化学兼容性。 |
| 关键词: 低温共烧陶瓷 NaBi(WO4)2陶瓷 介电性能 微波介质陶瓷 |
| 基金项目: |
| Abstract: A novel NaBi(WO4)2 (NBW) ceramic prepared by solid-phase synthesis, the phase structure, morphology, sintering properties, and microwave dielectric properties of NBW ceramic were investigated. NBW is a chemical properties stable compound and was used without special packaging. The NBW ceramic can be sintered densification at temperatures from 625 to 800 ℃ for 1-4 h. The X-ray diffraction showed that the NBW ceramic sintered at temperatures from 625 to 800 ℃ for 2 h is a tetragonal crystal scheelite structure single-phase ceramic. With the increase of sintered temperature, the permittivity and quality factor (Qf value) first increased then decreased, while the temperature coefficient of resonant frequency gradually decreased. The dielectric properties of NBW ceramic sintered at 650 ℃ for 2 h were permittivity of 14.36, Qf of 16 503 GHz, and temperature coefficient of resonant frequency of -1.055 ×10-5 ℃-1. When NBW was co-fired with Ag, it reacted with Ag to form Ag2W2O7, but NBW had chemical compatibility with Au and Al. |
| Keywords: low-temperature co-fired ceramic NaBi(WO4)2 ceramic dielectric property microwave dielectric ceramic |
| 投稿时间：2023-03-03 修订日期：2023-08-22 |
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| 张甦,杨秋红,李启笛.低温烧结NaBi(WO4)2陶瓷的介电性能[J].无机化学学报,2023,39(10):1923-1930. |
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