非水解溶胶-凝胶法(Non-hydrolytic sol-gel,NHSG)作为一种新的合成方法,融合了溶胶-凝胶法和溶剂热两者的优势.本文分别采用回流和容弹两种NHSG工艺制备了纯ZrO_2和氧化钇稳定的氧化锆(YSZ)粉体.DTA和XRD分析结果表明:容弹工艺制备的纯ZrO_2和YSZ粉体在凝胶阶段就已具有较高的结晶度,且YSZ粉体经330℃热处理后具有较完整的四方晶相结构;回流工艺制备的产物在凝胶阶段其无定形程度较高,经500℃左右热处理析出晶体.两种NHSG工艺制备粉体中单个颗粒尺寸绝大部分都在100nm以下.
Non-hydrolytic sol-gel method(NHSG)is a novel synthetic process,which combines the advantages of both sol-gel and solvothermal synthesis methods.Two kinds of N HSG processes i.e.,autoclave and reflux processes,were used to prepare pure ZrO_2 and yttria-stabilized zirconia(YSZ)powders.The results of DTA and XRD analysis show that the pure ZrO_2 and YSZ powders prepared via autoclave process have better crystallinity during gel stage,and YSZ powders forms perfect crystalline t-ZrO_2 phase after heating at 330℃.Pure ZrO_2 and YSZ powders obtained by reflux process were amorphous,they begin to crystallize by heating at 500℃.YSZ powders with an average particle size of about 100nm was obtained by both autoclave and reflux processes.
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