溶胶—凝胶法制备钇掺杂纳米氧化锆

Preparation of Y-doped Nano-ZrO_2 by Using Sol-gel Method

以氯氧化锆为原料,氨水为沉淀剂,经溶胶-凝胶法制备了钇掺杂的纳米氧化锆.分别以水和乙醇作溶剂,对比研究了不同溶剂体系获得的前驱体溶胶、凝胶的性能,并采用傅里叶变换红外光谱仪(FT-IR)、热重—差示扫描量热仪(TG-DSC)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)等对前驱体干凝胶粉末和产物进行了表征.结果表明:水溶剂体系制备出的溶胶、凝胶性质较好,干凝胶经650℃,2h煅烧,可得到分散性好的、钇完全固溶的四方相纳米氧化锆粉体.

In this paper,yttrium doped nano-ZrO2is prepared by sol-gel method with ZrOCl28H2O as starting material and NH3H2O as precipitant.The properties of the precursor sol and gelatum obtained using water and ethanol as solvent respectively were studied.The precursor dried gel powders and products were characterized by TG-DSC,XRD and SEM.It was shown that the qualities of the colloidal sol,gelatum prepared in water solvent system are better.Tetragonal nano-zirconia powders which the yttrium has completely melted into the crystal are synthesized by heating the dried gel at 650℃for 2h.