Microwave dielectric properties of Li1+x–yM1–x–3yTix+4yO3 (M=Nb5+, Ta5+) solid solutions
Microwave dielectric properties of Li1+x–yM1–x–3yTix+4yO3 (M=Nb5+, Ta5+) solid solutions
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DOI：
10.1016/s0955-2219(01)00101-7
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发表时间：
2001
影响因子：
5.7
通讯作者：
A. Borisevich;P. Davies
中科院分区：
文献类型：
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作者：
A. Borisevich;P. Davies
在Li 1 + x-yNb 1-x-3 yTix +4 yO 3固溶体体系中，研究了一系列低温烧结微波谐振器陶瓷。在1100°C烧结可获得相对介电常数（78-55）、Q×f值高达9000（6 GHz）、微波区温度系数为零的陶瓷。在Li_2 O-Ta_2 O_5-TiO_2体系中发现了相似的相，并确定了它们在1100°C的稳定区域。钽酸盐的微波介电性能与铌酸盐的微波介电性能相似。在Nb固溶体中加入10.2mol%V2O5可有效降低烧结温度，并在900°C下制备致密陶瓷。V的添加没有引起任何显着的微波性能的退化，它们与Ag粉的表观相容性可能表明作为共烧电路元件的潜在应用。
A series of new low sintering temperature microwave resonator ceramics were investigated in the Li1+x–yNb1–x–3yTix+4yO3solid solution system. Ceramics with high relative permittivities (78–55), Q×f values up to 9000 (6 GHz), and zero temperature coefficients in the microwave region could be obtained via sintering at 1100°C. Similar phases were identified in the Li2O–Ta2O5–TiO2system and their stability region at 1100°C was determined. The microwave dielectric properties of the tantalates were similar to those of their Nb counterparts. The addition of ⩾ 2 mol% V2O5to the Nb solid solutions was effective in producing a large reduction in the sintering T and dense ceramics could be prepared at T ⩽ 900°C. The addition of V did not induce any significant degradation of the microwave properties and their apparent compatibility with Ag powder may indicate potential applications as co-fired circuit components.