Low-temperature sintered fine-grain microwave dielectric ceramic material and preparation method thereof: Fid-Bau Portal

Low-temperature sintered fine-grain microwave dielectric ceramic material and preparation method thereof

ZHANG CAIXIA / SHI SHAN / TONG JIANXI / YU ZUGAO / LUO WEI / GU JIACHAO

The invention discloses a low-temperature sintered fine-grain microwave dielectric ceramic material and a preparation method thereof. The low-temperature sintered fine-grain microwave dielectric ceramic material is prepared from a main-phase ceramic material and a sintering aid, the main phase ceramic material is xRO-yLi < 2 > O < 2 >-Nb < 2 > O < 5-z > TiO2; wherein R is at least one of Mg, Zn and Ca; the sintering aid is a composite calcined product of ZnO-B2O3-SiO2 glass and an oxide, and the oxide is selected from at least one of CuO, MnO2 and Bi2O3. The RO component is added into the main-phase ceramic material, and the composite calcined product of ZnO-B2O3-SiO2 glass and at least one of CuO, MnO2 and Bi2O3 is taken as the sintering aid, so that the low-temperature sintered fine-grain microwave dielectric ceramic material which is good in dielectric property and high in strength, meets the environmental protection requirement, can be subjected to tape casting and can be co-fired with Ag metal can be prepared.

本发明公开了一种低温烧结细晶微波介质陶瓷材料及其制备方法，原料包括主相陶瓷材料和烧结助剂；所述的主相陶瓷材料为xRO‑yLi2O‑Nb2O5‑zTiO2；其中R为Mg、Zn、Ca中的至少一种；所述的烧结助剂为ZnO‑B2O3‑SiO2玻璃和氧化物的复合煅烧物，所述的氧化物选自CuO、MnO2、Bi2O3中的至少一种。本发明在主相陶瓷材料中添加RO组分，并以ZnO‑B2O3‑SiO2玻璃和CuO、MnO2、Bi2O3中的至少一种的复合煅烧物作为烧结助剂，可制备出良好介电性能、高强度、符合环保要求、可流延成型且能与Ag金属共烧的低温烧结细晶微波介质陶瓷材料。

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