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以偏钛酸、偏钨酸铵、木糖、硼酸为原料,采用“前驱体+碳热还原”法合成了(Ti,W)(B,C,N)纳米晶粉末。利用SEM、XRD等表征产物相组成和显微形貌,重点探讨了合成温度、保温时间对合成产物的影响。结果表明,合成温度、保温时间均对(Ti,W)(B,C,N)粉末合成有显著影响,随着合成温度的提高以及保温时间的延长,合成粉末晶粒尺寸呈明显长大趋势。在合成温度1 200℃,保温时间2h条件下成功合成了晶粒度约为21.3nm的(Ti,W)(B,C,N)纳米晶粉末。与传统的“普通球磨+碳热还原”法比较,“前驱体+碳热还原”法显著降低了合成温度,并具有原料成本低廉的优势。
(Ti, W) (B, C, N) nanocrystalline powders were synthesized by the method of “precursor + carbothermal reduction” using metatitanic acid, ammonium metatungstate, xylose and boric acid as raw materials. The phase composition and microstructure of the product were characterized by SEM and XRD. The effects of synthesis temperature and holding time on the synthesis product were discussed. The results show that the synthesis temperature and holding time all have significant influence on the synthesis of (Ti, W) (B, C, N) powders. With the increase of synthesis temperature and holding time, the grain size of the synthesized powders obviously increases . The (Ti, W) (B, C, N) nanocrystalline powders with a grain size of about 21.3 nm were successfully synthesized at a synthesis temperature of 1 200 ℃ and a holding time of 2 h. Compared with the traditional “ordinary ball milling + carbothermal reduction” method, the “precursor + carbothermal reduction” method significantly reduces the synthesis temperature and has advantages of low raw material cost.