Low-Temperature Sintering and Microwave Dielectric Properties of Li2MgSiO4 Ceramics
Low-Temperature Sintering and Microwave Dielectric Properties of Li2MgSiO4 Ceramics
复制标题
DOI：
10.1111/j.1551-2916.2009.02998.x
复制
发表时间：
2009-06-01
影响因子：
3.9
通讯作者：
Sebastian, Mailadil Thomas
中科院分区：
文献类型：
--
作者：
George, Sumesh;Anjana, Prabhakaran Sreekumari;Sebastian, Mailadil Thomas
本文讨论了一种低温共烧Li 2 MgSiO 4（LMS）介电材料的研制。采用固相陶瓷法制备了LMS陶瓷。LMS的煅烧和烧结温度分别优化为850 ℃/4 h和1250 ℃/2 h，以获得最佳的密度和介电性能。用X射线衍射和扫描电镜分析了陶瓷的晶体结构和显微结构。用谐振腔微扰法测量了陶瓷的微波介电性能。在1250 ° C/2 h下烧结的LMS在8 GHz下具有ε（r）= 5.1和tan δ = 5.2 X 10（-4）。通过添加硼硅酸锂（LBS）和硼硅酸锂镁锌（LMZBS）玻璃，LMS的烧结温度从1250 ℃/2小时降低到850 ℃/2小时。在925摄氏度/2小时下烧结的与1重量% LBS混合的LMS在8 GHz下具有λ（r）= 5.5和tan δ = 7 × 10（-5）。在875 ° C/2小时下烧结的与LMS混合的2重量%LMZBS在8 GHz下具有ε（r）= 5.9和tan δ = 6.7 X 10（-5）。
Development of a low-temperature sintered dielectric material derived from Li2MgSiO4 (LMS) for low-temperature cofired ceramic (LTCC) application is discussed in this paper. The LMS ceramics were prepared by the solid-state ceramic route. The calcination and sintering temperatures of LMS were optimized at 850 degrees C/4 h and 1250 degrees C/2 h, respectively, for the best density and dielectric properties. The crystal structure and microstructure of the ceramic were studied by the X-ray diffraction and scanning electron microscopic methods. The microwave dielectric properties of the ceramic were measured by the cavity perturbation method. The LMS sintered at 1250 degrees C/2 h had epsilon(r) = 5.1 and tan delta = 5.2 x 10(-4) at 8 GHz. The sintering temperature of LMS is lowered from 1250 degrees C/2 h to 850 degrees C/2 h by the addition of both lithium borosilicate (LBS) and lithium magnesium zinc borosilicate (LMZBS) glasses. LMS mixed with 1 wt% LBS sintered at 925 degrees C/2 h had epsilon(r) = 5.5 and tan delta = 7 x 10(-5) at 8 GHz. Two weight percent LMZBS mixed with LMS sintered at 875 degrees C/2 h had epsilon(r) = 5.9 and tan delta = 6.7 x 10(-5) at 8 GHz.