Na_2CO_3摩尔量对燃烧合成超细WC粉体相组成和粒度的影响  

Effect of Molar Amount of Na_2CO_3 on Composition and Particle Size of Ultrafine WC Powder Prepared by Combustion Synthesis

作　　者：朱丹丹[1] 欧玉静[1] 喇培清[1] 韩少博[1] 卢学峰[1] 魏玉鹏[1] 郭鑫[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050

出　　处：《当代化工》2014年第11期2215-2218,2230,共5页Contemporary Chemical Industry

基　　金：国家自然科学资助项目(51104622)

摘　　要：以WO3、Mg、C、NaCl以及Na2CO3为反应原料,采用燃烧合成法在Na2CO3不同摩尔量下大批量制备亚微米WC粉体,并对最终产物进行了SEM、XRD和粒度分析。结果表明:当Na2CO3摩尔量增加时,产物中WC含量增加,但没有得到完全单相的WC;WC的平均颗粒尺寸随Na2CO3摩尔量增大而显著下降,当Na2CO3含量为0.125mol时,WC的平均颗粒尺寸可下降至190nm。Using WO3, Mg, C, NaCl and Na2CO3 as raw materials, under different molar amount of Na2CO3, submicron WC powders were prepared by combustion synthesis, and the final products were characterized by SEM, XRD and particle size analysis. The results show that, when the molar amount of Na2CO3 increases, WC content in the product increases, but a complete single phase of WC cannot be got; the average WC grain size decreases significantly with increasing of Na2CO3molar amount, when Na2CO3 is 0.125 mol, the average WC grain size can be reduced to 190 nm.

关 键 词：NA2CO3 燃烧合成法 WC 

分 类 号：TQ031[化学工程]