Low temperature sintering and characterization of La2O3-B2O3-CaO glass-ceramic/LaBO3 composites for LTCC application
Low temperature sintering and characterization of La2O3-B2O3-CaO glass-ceramic/LaBO3 composites for LTCC application
复制标题
用于 LTCC 应用的 La2O3-B2O3-CaO 玻璃陶瓷/LaBO3 复合材料的低温烧结和表征
DOI：
10.1016/j.jeurceramsoc.2020.02.001
复制
发表时间：
2020-06-01
影响因子：
5.7
通讯作者：
Bai, Shuxin
中科院分区：
文献类型：
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作者：
Wang, Fenglin;Zhang, Weijun;Bai, Shuxin
以La_2O_3-B_2O_3-CaO（LBC）系微晶玻璃和LaBO_3系微晶玻璃为主要晶相，进行了低温烧结微晶玻璃/陶瓷复合材料的研究。研究了LBC/LaBO_3复合材料的烧结行为、相演变、显微结构和介电性能。LBC/LaBO_3复合材料的致密化是通过部分反应烧结实现的。LaBO_3填料在高温下作为液相的补充提供者直接参与玻璃/陶瓷复合材料的烧结过程，并抑制其它晶相的形成，使LBC/LaBO_3复合材料呈现出异常简单的相结构，有利于调节复合材料的性能。在950 ℃下烧结2 h的LBC/LaBO 3复合材料具有介电常数ε（r）= 10.12，介电损耗tan δ = 1.82 × 10（-3），Q × f = 9312 GHz（16.95 GHz），并且在与Ag电极共烧时显示出良好的化学相容性。这表明LBC玻璃/LaBO 3陶瓷复合材料具有满足微波LTCC应用要求的潜力。
An interesting attempt to develop low temperature sintering glass-ceramic/ceramic composite based on La2O3-B2O3-CaO (LBC) glass-ceramic and LaBO3 ceramic, which was reported to be the main crystalline phase precipitated from La2O3-B2O3 -based glass-ceramics, has been taken. The sintering behavior, phase evolution, microstructures and dielectric properties of LBC/LaBO3 composites have been studied. The densification of LBC/LaBO3 composite is achieved by partially reactive sintering. The LaBO3 filler is directly involved in the sintering process of glass/ceramic composite as additional liquid phase provider at high sintering temperature, and it will suppress the formation of other crystalline phases so that the produced LBC/LaBO3 composites exhibit unusual simple phase structures, which is beneficial to regulate the performance of composites. LBC/LaBO3 composite with 50 wt% LaBO3 sintered at 950 QC for 2 h has a dielectric constant epsilon(r) = 10.12, a dielectric loss tan delta = 1.82 x 10(-3), a Q x f = 9312 GHz (at 16.95 GHz), and shows good chemical compatibility while co-firing with Ag electrode. This indicates that LBC glass/LaBO3 ceramic composites have a potential to meet the requirements of microwave LTCC applications.