摘要 : An origin of high surface-area ZrO_2 prepared byaging a precipitate of zirconium hydroxide in basic solution underreflux conditions reported by Chuah et al. was investigated. Thespecific surface area of ZrO_2 calcined at 500degC i... 展开 An origin of high surface-area ZrO_2 prepared byaging a precipitate of zirconium hydroxide in basic solution underreflux conditions reported by Chuah et al. was investigated. Thespecific surface area of ZrO_2 calcined at 500degC increased upto 250m~2g~-1 when the solution containing the precipitate hadbeen treated under hydrothermal conditions with several pieces ofquartz glass tube in a vessel made of Teflon. In contrast, no suchhigh surface area was observed in a ZrO_2 sample treated withoutglass tube. We observed that silicate specific surface area ofZrO_2 sample increased with increasing hydrothermal period. Thesilicate species deposited on the surface of ZrO_2 particle preventsthe agglomeration of ZrO_2 primary particles during calcination,resulting in the high surface-area ZrO_2. Therefore, it is concludedthat the contamination of SiO_2 from glass vessel plays importantrole in the preparation of high-surface area ZrO_2. 收起