溶胶-凝胶法制备锆溶胶的研究

Study on Stable Zirconia Sol Formation by Sol Gel Process

在溶胶凝胶（ＳｏｌＧｅｌ） 法制备锆溶胶过程中， 用改变粘度法讨论了锆溶胶的ＳｏｌＧｅｌ 化学过程。当０－５≤ｃＺｒ（ＯＣ４Ｈ９）４／ｃＨＡｃ≤１ 时， 可得到完全稳定的高粘度溶胶。用ＦＴＩＲ 研究了锆溶胶水解与聚合机理， 在１５７８ ｃｍ －１ 和１４６０ ｃｍ －１ 观察到双峰， 随ｃＺｒ（ＯＣ４ Ｈ９）４／ｃＨＡｃ 摩尔比增加，１５７８ ｃｍ －１ 和１４６０ ｃｍ －１ 峰线加宽， 说明产生了ＣＨ３ＣＯＯ－ 的桥键。

Abstract: By means of the change of sol viscosity, the chemistry of sol gel formation of zirconia was studied. When 0 5≤ c Zr(OC 4H 9) 4 / c HAc ≤1, a fully stable, highly viscous sol was obtained. Hydrolysis and polycondensation processes of Zr sol were characterized by FT IR. The line at 1578 cm -1 and 1460 cm -1 was observed. At increasing molar ratios of c Zr(OC 4H 9) 4 / c HAc , a further increase in the intensity of the line at 1578 cm -1 and 1460 cm -1 was observed, which showed there exists the monodental ligand CH 3COO -.