以蔗糖为碳源制备亚微米级TiB_(2)粉体的研究  

Preparation of submicron TiB_(2) powder using sucrose as carbon source

作　　者：王兴国 陈滨 李欣 长世伦 徐晨 杨建红 Wang Xingguo;Chen Bin;Li Xin;Chang Shilun;Xu Chen;Yang Jianhong(School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China;不详)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《耐火材料》2024年第5期405-409,共5页Refractories

基　　金：江苏省自然科学青年基金资助项目(BK20200898)。

摘　　要：为探讨有机碳源对TiB_(2)粉体细化的影响,以TiO_(2)、B_(4)C和蔗糖为原料,分别在1150、1250、1350、1450℃保温30 min,通过硼热/碳热还原法制备了TiB_(2)粉体,并初步探讨了TiO_(2)-B_(4)C-蔗糖体系的反应机制以及TiB_(2)晶粒的细化机制。结果表明:在硼热/碳热还原过程中,Ti_(2)O_(3)和TiC是两种重要的中间产物,且均由TiO_(2)和C直接反应生成,随后TiB_(2)则可能以Ti_(2)O_(3)或TiC为钛源分别与B_(2)O_(3)和C反应生成。此外,由于蔗糖裂解出的高活性纳米碳具有孔隙结构,可提高反应效率,使得该体系在1450℃保温30 min的条件下成功制备出平均粒径为0.35μm的亚微米级TiB_(2)粉体。To explore the influence of the organic carbon source on the refining of TiB_(2) powder,TiB_(2) powder was prepared by borothermal/carbothermal reduction using TiO_(2),B_(4)C and sucrose as raw materials,insulating at 1150,1250,1350 and 1450℃for 30 min,respectively.The reaction mechanism of the TiO_(2)-B_(4)C-sucrose system,as well as the refining mechanism of TiB_(2) grains was initially explored.The results show that Ti_(2)O_(3) and TiC are two important intermediate products during the borothermal/carbothermal reduction process,which are both generated by the direct reaction of TiO_(2) and C.Subsequently,TiB_(2) may be generated with Ti_(2)O_(3) or TiC as the titanium source reacting with B_(2)O_(3) and C.In addition,the highly activated nanocarbon from sucrose pyrolysis has a pore structure,which can improve the reaction efficiency and successfully enable the preparation of submicron TiB_(2) powder with an average particle size of 0.35μm under the condition of insulating at 1450℃for 30 min.

关 键 词：TiB_(2) 蔗糖 硼热/碳热还原法 孔隙结构 

分 类 号：TQ175[化学工程—硅酸盐工业]