碳源及反应温度对碳热还原法制备纳米ZrC形貌与物相的影响  

Effects of carbon source and synthesized temperature on the morphology and phase composition of nano-sized ZrC powders prepared by carbothermal reduction method

作　　者：曾广 杨鑫[1] 苏哲安[1] 陈蕾 方存谦 黄启忠[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2018年第1期17-24,共8页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金自助项目(51304249);湖南省自然科学基金资助项目(14JJ3023)

摘　　要：分别用葡萄糖与石墨烯作为碳源,用乙酸锆为锆源,采用碳热还原法制备纳米ZrC和二维片层结构的ZrC,研究碳源与处理温度对ZrC形貌及物相组成的影响。结果表明:以葡萄糖作为碳源时,在1 400℃开始生成ZrC,在1 600℃时完全转变为ZrC纳米晶,粒径为120~220 nm,而以石墨烯作为碳源时,在1 600℃下得到二维片层结构的ZrC,片层厚度约为240 nm。石墨烯不仅作为碳源参与反应,同时为ZrO_2的析出与ZrC的长大提供模板。ZrC nano-crystals and 2D-nanosheet ZrC were synthesized by carbothermal reduction method using glucose and graphene as carbon source and zirconium acetate as zirconium source. The effects of carbon source and the synthesized temperature on morphology and phase composition of ZrC were investigated. The results show that using glucose as carbon source, ZrC is formed initially at 1 400 ℃ and completely transformed to ZrC nano-crystals at 1 600 ℃ with the sizes in the range of 140？200 nm. Using graphene as carbon source, ZrC 2D-nanosheet is synthesized at 1 600 ℃ with the thickness of 240 nm. Graphene not only offers carbon source, but also serves as a template for the precipitation of ZrO2 and growing of ZrC 2D-nanosheet in the carbothermal reduction.

关 键 词：ZRC 碳热还原 石墨烯 片层结构 葡萄糖 ZRO2 

分 类 号：TB383.3[一般工业技术—材料科学与工程]