共沉淀法原位合成TiB_2/B_4C陶瓷复合粉体

In-Situ Synthesis of TiB_2/B_4C Composite Ceramic Powder Through Co-Precipitation

采用共沉淀技术,以TiCl4溶液和B4C粉末为主要原料原位合成了TiB2/B4C陶瓷复合粉体.利用TEM研究了溶液的pH值和氨水滴定速度对Ti(OH)4包覆B4C效果的影响,利用X射线衍射仪研究了合成温度对陶瓷复合粉体物相的影响,并分析了TiB2/B4C陶瓷复合粉体的合成热力学.实验结果表明:当溶液的pH值为5,氨水的滴定速度为2 mL/min时,Ti(OH)4包覆B4C效果最佳,当合成温度高于1 350℃时,可以合成出TiB2/B4C陶瓷复合粉体.

TiB_2/B_4C composite ceramic powder was synthesized in situ through co-precipitation mainly with TiCl_4 solution and B_4C powder as raw materials.TEM was used to investigate the effects of the pH value of the solution and titration rate of NH4(OH) on Ti(OH)_4-clad B_4C,while XRD was used to the effect of synthesizing temperature on the phases of the powder.And the thermodynamics of synthesis of TiB_2/B_4C composite powder was analyzed.The results indicated that when the pH value of the solution is 5 with a ...