用金尾矿合成Ca-α-SiAlON/SiC粉体

金属矿山 ›› 2008, Vol. 38 ›› Issue (10): 145-148.

用金尾矿合成Ca-α-SiAlON/SiC粉体

仉小猛¹，徐利华¹，郝洪顺¹，刘明¹，何芳²，郭玉娟¹

1.北京科技大学；2.中国石油天然气集团公司

收稿日期:2008-08-25 出版日期:2008-10-15 发布日期:2011-07-13
基金资助:
国家科技支撑计划重大项目（编号：2006BAB02A09）和重点项目（编号：2006BAB12B03）。

Synthesis of Ca-α-SiAlON/SiC Powder with Gold Tailings

Zhang Xiaomeng¹，Xu Lihua¹，Hao Hongshun¹，Liu Ming¹，He Fang²，Guo Yujuan¹

1.University of Science and Technology Beijing；2.China National Petroleum Corporation

Received:2008-08-25 Online:2008-10-15 Published:2011-07-13

摘要/Abstract

摘要： 以河南灵宝金矿尾矿为主要原料，配入适量硅砂和分析纯CaO调整组分，利用碳热还原氮化法合成Ca-α-SiAlON/SiC粉。结果表明：Ca-α-SiAlON的形成与体系温度及CaO掺量有关。随反应温度升高，反应产物依次为SiC、α-Si₃N₄、β-Si3N4和Ca-α-SiAlON，α-Si₃N₄、β-Si₃N₄和SiC是合成Ca-α-SiAlON的中间产物。在烧结温度为1 600 ℃，保温时间为5 h，CaO按化学计量（4.2%）配入的条件下，可获得良好的Ca-α-SiAlON和SiC复合产物，其中Ca-α-SiAlON相对比例约占72%，形貌为柱状晶。

关键词: 金矿尾矿, Ca-&alpha, -SiAlON/SiC, 碳热还原氮化法, 烧结温度, CaO掺量

Abstract: Ca-α-SiAlON/SiC powder was produced by carbothermal reduction-nitridation method and using the gold tailings from Henan Lingbao Gold Mine as the main raw material, and a proper amount of silica and calcium oxide of analytical grade as regulator. The results show that the formation of Ca-α-SiAlON is dependent on the system temperature and the amount of CaO. With the rise of reaction temperature, the reaction products are formed in sequence of SiC, α-Si₃N₄, β -Si₃N₄ and Ca-α-SiAlON. α-Si₃N₄、β-Si₃N₄ and SiC are intermittent products in synthesizing Ca-α-SiAlON. At a sintering temperature of 1 600 ℃, a temperature retaining time of 5 h and a stoichiometrical proportion of 4.2% CaO, good Ca-α-SiAlON and SiC compound product can be obtained, with the elongated grain Ca-α-SiAlON amounting to about 72%.

Key words: Gold tailings,Ca-α-SiAlON/SiC, Carbothermal reduction-nitridation, Sintering temperature, CaO addition

仉小猛, 徐利华, 郝洪顺, 刘明, 何芳, 郭玉娟. 用金尾矿合成Ca-α-SiAlON/SiC粉体[J]. 金属矿山, 2008, 38(10): 145-148.

ZHANG Xiao-Meng, XU Li-Hua, HAO Hong-Shun, LIU Ming, HE Fang, GUO Yu-Juan. Synthesis of Ca-α-SiAlON/SiC Powder with Gold Tailings[J]. Metal Mine, 2008, 38(10): 145-148.