Improvement in the Low-Temperature Sintering Performance and Characteristics of Alumina with CuO-TiO2-Nb2O5 Additive by Controlling the Firing Atmosphere
Improvement in the Low-Temperature Sintering Performance and Characteristics of Alumina with CuO-TiO2-Nb2O5 Additive by Controlling the Firing Atmosphere
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DOI：
10.2497/jjspm.63.701
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Koichi Shigeno;Eisaku Kojima;H. Fujimori
中科院分区：
文献类型：
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作者：
Koichi Shigeno;Eisaku Kojima;H. Fujimori
为了降低具有CuO-TiO 2-Nb 2 O 5添加剂的氧化铝的烧结温度，研究了由烧成气氛的变化，特别是氧分压（pO 2）引起的影响。确认了在pO 2低于空气气氛中的pO 2（0.21atm）的区域中促进烧结。通过TG-DTA和XRD对添加剂的分析表明，随着烧成气氛的改变，生成的化合物的熔点和组成都发生了变化。推测这些变化影响烧结性能。通过将pO 2降低至0.05 atm，在925 °C的烧制温度下获得了具有良好介电性能的致密烧结样品。
For the purpose of lowering the sintering temperature of alumina with a CuO-TiO2-Nb2O5 additive, effects induced by changes in the firing atmosphere, in particular, oxygen partial pressure (pO2), were studied. It was confirmed that sintering was promoted in regions where the pO2 was lower than that in the air atmosphere, 0.21 atm. Our analysis of the additive using TG-DTA and XRD methods indicated that both the melting temperature and compositions of the produced compound vary with the change in firing atmosphere. These changes were presumed to affect the sintering performance. By lowering the pO2 to 0.05 atm, a dense sintered sample with good dielectric properties was obtained at a firing temperature of 925 °C.