碳还原法硼化锆粉体的制备研究
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摘要
真空条件下,利用碳还原法进行硼化锆粉体的制备,是以氧化锆、活性炭、碳化硼和氧化硼为主要原料,研制出纯度较高,颗粒较小且制作工艺简单、成本较低的硼化锆粉体。笔者主要研究在碳热还原反应中,碳含量、烧成温度和保温时间对反应产物的影响。通过对反应产物进行XRD、SEM等测试分析,找到一条制取高质量硼化锆粉体的反应路线:多加入12.5%碳可以保证反应产物有着较高的纯度。选1 650℃为反应温度,1.5 h为保温时间既可以保证产品有较高的纯度,又能使颗粒粒径在一个较小的范围内。
Under the condition of vacuum, reduction of zirconium diboride powder by carbon preparation, the method is based on zirconium oxide, activated carbon, boron carbide and boron oxide as the main raw material, developed a high purity zirconium boride powder particles is small and simple production process and low cost. The effect of carbon content, sintering temperature and holding time on the reaction products in carbothermal reduction reaction was studied in this paper. The reaction products were analyzed by XRD, SEM and so on. A reaction route for preparing high quality zirconium diboride powder was found. The addition of 12.5% carbon could guarantee the purity of the reaction products. Choosing 1 650 ℃ as reaction temperature and 1.5 h as holding time can not only ensure high purity of the product, but also make the particle size in a smaller range.
Under the condition of vacuum, reduction of zirconium diboride powder by carbon preparation, the method is based on zirconium oxide, activated carbon, boron carbide and boron oxide as the main raw material, developed a high purity zirconium boride powder particles is small and simple production process and low cost. The effect of carbon content, sintering temperature and holding time on the reaction products in carbothermal reduction reaction was studied in this paper. The reaction products were analyzed by XRD, SEM and so on. A reaction route for preparing high quality zirconium diboride powder was found. The addition of 12.5% carbon could guarantee the purity of the reaction products. Choosing 1 650 ℃ as reaction temperature and 1.5 h as holding time can not only ensure high purity of the product, but also make the particle size in a smaller range.
引文
1 屈强.超高温硼化物结构陶瓷的制备工艺及微结构分析.哈尔滨:哈尔滨工业大学,2006
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7 吕春燕,顾华志,等.ZrB2系陶瓷材料的研究进展.材料导报,2003,14(17):246～249
2 熊金森,王玺堂.ZrB2在无机非金属材料中的应用现状.武汉科技大学学报(自然科学版),2006,29(3):229～232
3 张海军,贾全利,贾晓林,等.微波碳热还原低温合成ZrB2粉体的研究.材料导报,2007,21(11A):61～63
4 田庭燕,张玉军,等.二硼化锆系陶瓷复合材料研究进展.现代技术陶瓷,2005(4):21～23
5 山口明良,等.ZrB2在含碳耐火材料中的行为及影响.武钢技术,1994,9(12):3～5
6 方舟,傅正义,王皓,等.ZrB2陶瓷的制备和烧结.中国有色金属学报,2005,11(15):1 699～1 701
7 吕春燕,顾华志,等.ZrB2系陶瓷材料的研究进展.材料导报,2003,14(17):246～249