Online First:10 November 2006,
Published:2006
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Crystallization of AlO-SiO-CaFGlass Powder Prepared by Liquidphase Precipitation Synthesis Method[J]. 2006, 23(4).
DOI:
Crystallization of AlO-SiO-CaFGlass Powder Prepared by Liquidphase Precipitation Synthesis Method[J]. 2006, 23(4). DOI:
采用液相沉淀法制备了超细A l2O3-S iO2-CaF2系玻璃粉体
并对粉体进行了不同温度下的热处理
借助XRD、TEM、DSC等手段研究了初始粉体特征及晶化特性.结果表明
液相沉淀初始粉体呈典型的非晶态特征
粉体颗粒呈近球形形貌
颗粒尺寸在30~70nm范围内;温度在500~800℃范围内
粉体发生一系列析晶转变
在温度约为545℃时优先析出CaF2晶相
随温度升高
依次析出A l2S iO5、Ca2S iO4等晶相.
Ultra-fine glass powders of Al2O3-SiO2-CaF2 are prepared by the precipitation process
and the prepared powders are treated with heat treatment in different temperatures.The characteristics of the powders are studied by using XRD
TEM and DSC.The results indicate that the prepared powder belongs to amorphous compounds
and the size of the nearly spherical particle is in the range of 3070 nm.As the temperature is in the range of 500800 ℃
the crystal phase of CaF2 is crystallized firstly from the prepared amorphous powder at about 545℃;with the temperature rising
Al2SiO5、Ca2SiO4 crystal phases are also separated out sequentially.
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