熔融法短流程制备二硼化钛高端超细粉体的研究  

Study on preparation of high-quality ultrafine TiB_(2) powder by short process melting method

作　　者：李文靓 李德福 辛亚男 唐敏 Li Wenjing;Li Defu;Xin Yanan;Tang Min(Pangang Group Research Institute Co.,Ltd.,State Key Laboratory of Vanadium and Titanium Resources Compre-hensive Utilization,Panzhihua 617000,Sichuan,China;Chengdu Advanced Metal Materials Industry Technology Re-search Institute Co.,Ltd.,Chengdu 610300,Sichuan,China)

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]成都先进金属材料产业技术研究院股份有限公司,四川成都610300

出　　处：《钢铁钒钛》2022年第5期23-29,共7页Iron Steel Vanadium Titanium

摘　　要：基于企业生产研究背景与市场竞争优势,提出一种固液结合的短流程二硼化钛高端超细粉体的制备方法,利用廉价的钛源(二氧化钛)、硼源,无危险还原剂,采用短流程、低成本的方案制备出高产量、较短生产周期且无环境污染,具有一定工业推广性的固液结合的高端超细粉体--二硼化钛。研究了钛源、硼源的选择问题、熔融盐的比例问题、高端粉体的合成温度、Ti/B摩尔比、保温时间对TiB_(2)粉体合成的影响。通过XRD和SEM对粉体的物相组成、显微形貌进行了表征。研究结果表明:当选择摩尔比为1∶1 NaCl-KCl混合盐的情况下,反应物以TiO_(2)/B为3∶10(摩尔比)配比,700℃保温2 h时开始有TiB_(2)生成,随温度升高,产物中目标产物的纯度逐步提高,保温温度需达到950℃才可得到纯净的目标产物,无其余副产物生成,形貌为立方状,棱角分明,粒径为150 nm左右。若改变保温时长,当保温时长为5 h,900℃即可得到纯净的目标产物。Based on research background and market competitive advantage of the enterprise production, a method of preparing high-quality ultrafine TiB_(2) powder with short process by melting method was proposed in this paper. This method is high yield, short production cycle and no environmental pollution, by which advanced ultrafine TiB_(2) powder with certain industrial extensibility was prepared using cheap titanium source, boron(B) source and nonhazardous reducing agent with short process and low cost. The effects of the selection of titanium and B sources, the proportion of molten salt, the synthesis temperature of high-quality powder, Ti/B molar ratio and holding time on the synthesis of TiBpowder were studied. The phase composition and microstructure of the powder were characterized by XRD and SEM. The results show that when the molar ratio of NaCl/KCl mixed salt is 1∶1 and the molar ratio of TiO_(2)/B is 3∶10, TiB_(2) begins to form when the reactant is kept at 700 ℃ for 2 h. With the increase of temperature, the purity of the target product in the product gradually improves. The pure target product can be obtained only when the holding temperature reaches 950 ℃ without other byproducts. The morphology of powder is cubic, sharp edges and corners. The particle size is about 150 nm.If the holding time is changed, the pure target product can be obtained at 900 ℃ with 5 h of holding time.

关 键 词：二硼化钛超细粉体 熔盐法 二氧化钛 硼粉 

分 类 号：TF123.1[冶金工程—粉末冶金] TF823[冶金工程—冶金物理化学]