High Temperature Chemical Reaction of La2O3 in H3BO3-C System
来源期刊：JOURNAL OF RARE EARTHS2007年第3期
论文作者：Xu Jingyu Wu Wenyuan Tu Ganfeng Peng Kewu
Key words：high temperature chemical reaction; lanthanum boride; boric acid-carbon; lanthanum oxide; rare earths;
Abstract: The high temperature chemical reaction process of La2O3 in H3BO3-C system was studied by means of XRD and TG-DTA. The results showed that dehydration reaction of H3BO3 occurred in the temperature range of 82～390 ℃;La2O3 and B2O3 reacted to form LaB3O6, LaBO3, and B4C in the temperature range of 836～1400℃;at 1450 ℃, B4C and LaBO3 further reacted to form LaB4, and partial LaB4 and B reacted to form LaB6;at 1500 ℃, LaB4 and B reacting into LaB6 was the main reaction, and the content of LaB6 increased with prolonging time.
Xu Jingyu1，Wu Wenyuan1，Tu Ganfeng1，Peng Kewu1
(1.School of Material and Metallurgy, Northeastern University, Shenyang 110004, China)
Abstract:The high temperature chemical reaction process of La2O3 in H3BO3-C system was studied by means of XRD and TG-DTA. The results showed that dehydration reaction of H3BO3 occurred in the temperature range of 82～390 ℃;La2O3 and B2O3 reacted to form LaB3O6, LaBO3, and B4C in the temperature range of 836～1400℃;at 1450 ℃, B4C and LaBO3 further reacted to form LaB4, and partial LaB4 and B reacted to form LaB6;at 1500 ℃, LaB4 and B reacting into LaB6 was the main reaction, and the content of LaB6 increased with prolonging time.
Key words:high temperature chemical reaction; lanthanum boride; boric acid-carbon; lanthanum oxide; rare earths;
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