Sintering behavior and microwave dielectric properties of B2O3-La2O3-MgO-TiO2 based glass-ceramic for LTCC applications
Sintering behavior and microwave dielectric properties of B2O3-La2O3-MgO-TiO2 based glass-ceramic for LTCC applications
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DOI：
10.1016/j.matlet.2017.09.004
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发表时间：
2018-01-01
影响因子：
3
通讯作者：
Luo, Lan
中科院分区：
文献类型：
--
作者：
Ren, Haishen;Dang, Mingzhao;Luo, Lan
以B_2O_3-La_2O_3-MgO-TiO_2(BLMT)玻璃为基材，添加氧化锌、氧化锆和二氧化钛三元填料，制备了一种新型低温共烧陶瓷，并对其烧结行为、晶相、显微结构和微波介电性能进行了研究。结果表明，BLMT玻璃在640℃左右开始烧成，在710℃以上大部分烧成；在此过程中，BLMT玻璃析晶生成LaBO_3，其中的氧化锌与残渣玻璃相反应进入玻璃相，而二氧化钛和氧化锆稳定存在。随着烧结温度的升高，微晶玻璃的介电常数和谐振频率温度系数减小，品质因数先增大后减小。通常，在860摄氏度下烧结20分钟的微晶玻璃的最大密度可达4.25克/厘米(3)，并具有优异的微波介电性能，介电常数为14.08，品质因数为41,600 GHz(8 GHz)，谐振频率温度系数为-2.78 ppm/℃。(C)2017 Elsevier B.V.保留所有权利。
A new low temperature co-fired ceramic is fabricated from B2O3-La2O3-MgO-TiO2 (BLMT) glass with ZnO, ZrO2 and TiO2 ternary fillers, and the sintering behavior, crystalline phases, microstructures and microwave dielectric properties of the glass-ceramics is investigated. The results show that its sintering process starts at about 640 degrees C and ends up mostly at higher than 710 degrees C. During the process, BLMT glass crystallizes forming LaBO3 and the filler ZnO reacts with and gets into the residue glass phase, while TiO2 and ZrO2 are stable. With increasing sintering temperature, dielectric constant and temperature coefficient of resonant frequency of the glass-ceramic decrease, while the quality factor firstly increases and then decreases. Typically, the glass-ceramic sintered at 860 degrees C for 20 min reaches a maximum density of 4.25 g/cm(3) and has an excellent microwave dielectric properties with the dielectric constant of 14.08, quality factor of 41,600 GHz (at 8 GHz), and temperature coefficient of resonant frequency of -2.78 ppm/degrees C. (c) 2017 Elsevier B.V. All rights reserved.