物理学报2012，Vol.61Issue(22)：351-357,7.
ZrV2-xPxO7固溶体的相变与热膨胀性质的研究
Phase transition and thermal expansion properties of ZrV2-xPxO7
摘要
Abstract
ZrV2-xPxO7 (x = 0, 0.4, 0.8, 1.0) solid solutions are prepared using a solid state reaction method. Powder X-ray diffraction (XRD) analysis reveals that the as-prepared solid solutions are of single-phase cubic type in crystal structure. Temperature dependent Raman spectroscopic studies demonstrate that the phase transition temperature of ZrV2-xPxO7 decreases with the increase of the content of P. ZrV2O7, ZrV1.6P0.4O7, ZrV1.2P0.8O7 and ZrVPO7 transform from a 3 × 3 ×3 superstructure to a 1 ×1 × 1 normal structure at about 373 K, 363 K 273 K and 213 K, respectively. The results of thermal expansion testing indicate that the temperature of positive thermal expansion changes to negative thermal expansion with the increase of P content. The temperatures of positive-to- negative thermal expansion of ZrV2-xPxO7 are 429 K, 403 K, 372 K, 390 K, 398 K and 435 K for x = 0, 0.2, 0.4, 0.6, 0.8 and 1, respectively. Two phase change transformations are demonstrated in ZrV2-xPxO7 materials in our work, which is beneficial for preparing the negative thermal expansion materials at room temperature using ZrV2 07.关键词
负热膨胀/相变/拉曼光谱Key words
negative thermal expansion/phase transitions/Raman spectroscopy分类
化学化工引用本文复制引用
袁焕丽,袁保合,李芳,梁二军..ZrV2-xPxO7固溶体的相变与热膨胀性质的研究[J].物理学报,2012,61(22):351-357,7.基金项目
国家自然科学基金 （）
教育部博士点基金（批准号：20114101110003）和郑州市创新团队基金（批准号：2011-03）资助的课题. （）
