Phase composition of SiC-ZrO2 composite materials synthesized from zircon doped La2O3

作     者：MA Beiyue YU Jingkun 

作者机构：School of Materials and Metallurgy Northeastern University Shenyang 110004 China School of Materials and Metallurgy Northeastern University Shenyang 110004 China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2009年第27卷第5期

页      面：806-810页

核心收录：

学科分类：080603[工学-有色金属冶金] 0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0806[工学-冶金工程] 0708[理学-地球物理学] 0703[理学-化学] 

基　　金：Project supported by the National Natural Science Foundation of China (50274021) and Baoshan Iron and Steel Co.  Ltd 

主　　题：composite materials carbothermal reduction zircon lanthanum oxide rare earths 

摘      要：A study was carried out to determine the optimum parameters for synthesis of SiC-ZrO2 composite materials by carbothermal re-duction of zircon. Test samples were prepared by mixing average mesh size of less than 30 μm of carbon black and 40 μm of zircon with C/ZrSiO4 mass ratio of 0.2 and the extra addition amount of La2O3 was 0, 1 wt.% and 2 wt.%. Prepared samples were subjected to the car-bothermal reduction process at temperatures of 1723, 1753, 1773 and 1803 K for 4 h, respectively. The carbothermal reduction process was conducted in an atmosphere controlled tube furnace at an argon flow of 1.5 L/min. All products were examined by X-ray diffraction (XRD) to determine the transformation. The results showed that the best transformation of SiC-ZrO2 composite materials occurred at 1803 K for 4 h with the amount of 2 wt.%La2O3.