Phase Constitution in Mixed Gd2O3 and B4C by Sintering at High Temperature
来源期刊：JOURNAL OF RARE EARTHS2005年第3期
论文作者：Sun Shuchen HU Guangyong Xu Jingyu Bian Xue Wu Wenyuan Tu Ganfeng
Key words：high temperature sintering; phase constitution; gadolinium boride; boron carbide; gadolinium oxide; rare earths;
Abstract: The phase constitution in mixed Gd2O3 and B4C by sintering in graphite tube furnace at the temperature of 100～1489 ℃ in argon atmosphere was studied by means of XRD and TG-DTA. The results show that the impurity C reacts with O in the B4C at the temperature of 367～458 ℃. When the temperature is 800 ℃, Gd2O3 reacts with B4C, and the reaction products include GdB6, GdB4, GdBO3, GdBC and B. GdBC changes into GdB4 at 1200 ℃. When the temperature is 1470 ℃, GdB6 is obtained by the reaction of GdB4 with elemental B. The content of GdB6 is increasing with the prolonging time.
Sun Shuchen1，HU Guangyong1，Xu Jingyu1，Bian Xue1，Wu Wenyuan1，Tu Ganfeng1
(1.School of Material and Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The phase constitution in mixed Gd2O3 and B4C by sintering in graphite tube furnace at the temperature of 100～1489 ℃ in argon atmosphere was studied by means of XRD and TG-DTA. The results show that the impurity C reacts with O in the B4C at the temperature of 367～458 ℃. When the temperature is 800 ℃, Gd2O3 reacts with B4C, and the reaction products include GdB6, GdB4, GdBO3, GdBC and B. GdBC changes into GdB4 at 1200 ℃. When the temperature is 1470 ℃, GdB6 is obtained by the reaction of GdB4 with elemental B. The content of GdB6 is increasing with the prolonging time.
Key words:high temperature sintering; phase constitution; gadolinium boride; boron carbide; gadolinium oxide; rare earths;
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