低温水热合成四方相纳米二氧化锆.pdfVIP

56 3 Vol56 No3 2005 3 Journal of Chemical Industry and Engineering ( China) March 2005 高龙柱, 陈洪龄, 徐南平 ( , 2 0009) : , 80 8h . XRDTEM . , pH , ZrO . 2 , pH , 80 ZrO , 2 0nm . . , . : ; ; ; : T Q 34 2 O 6 4 : A : 0438- 57 (2005) 03- 055 - 04 Synthesisof ZrO2 nanopowderswith pure tetragonal phase by low temperature hydrothermal method GAO Longzhu, CHE Hongling, XU anping ( College of Chemistry and Chemical Engineer ing, N anj ing University of Technology , N anj ing 2 0009, J iangsu, China) Abstract: T he ZrO2 nanopow ders w ere prepared from zirconium ( ) nitrate by the hydrothermal method at 80 for 8 h in reaction solution w ith different pH. T he Zr O2 pow ders w ere characterized by XRD and TEM . T he ZrO2 pow ders of a mixture of mZrO2 and tZrO2 can be directly synthesized from zirconium ( ) nitrate by the low hydrothermal process in reaction solution w ith different pH. When the reaction solution w as added w ith glycerin, it w as found that ZrO2 pow ders w ith pure tetragonal phase could be directly synthesized at 80 w ith certain pH. T he proportion of glycerin and the pH value of reaction solution w ere interrelated to the crystallographic forms of the zirconia pow ders. The ZrO2 pow ders w ith pure tetragonal phase are formed at 80 for 8 h w hen glycerin w as added to the reaction solution w ith 4+ the ratio [ glycerin] [ Zr ] greater than and the pH 9 , in other experiments mixtures of monoclinic