水和ジルコニア粒子のラマン散乱の粒径依存性

概要

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The Raman spectra of hydrous zirconia particles prepared by hydrolysis of ZrOCl_2 were measured. The number of Raman bands and the Raman shift observed for as-prepared hydrous zirconia particles are similar to those observed for the monoclinic crystalline ZrO_2 except the width of measured Raman bands are broad. Using high resolution TEM, it was observed that hydrous zirconia particles consist of highly crystallized primary particles of 30Å in diameter. These experimental facts indicated that the broadness of Raman bands were resulted from breakdown in K-momentum conservation in small size particles. The Raman bands of hydrous zirconia particles heated up to 900℃ became narrower with increasing temperature. TEM observations also showed that the size of heat-treated particles increased with increasing temperature Therefore the narrowing in Raman bands is considered as a result of increase in particle size as observed in small particle size crystalline silicon. The relationship between the width of Raman band and the particle size in hydrous zirconia particles was experimentally established.
社団法人日本セラミックス協会の論文
1990-12-01