物理化学学报2018，Vol.34Issue(4)：339-343,5.DOI:10.3866/PKU.WHXB201709081
(Fe1-xNix)ZrF6固溶体晶体结构与可调控的热膨胀性质
Controllable Thermal Expansion and Crystal Structure of (Fe1-xNix)ZrF6 Solid Solutions
摘要
Abstract
Most materials expand on heating and contract on cooling.In the recent years,however,some compounds have been found to exhibit abnormal negative thermal expansion (NTE) behavior;this presents an opportunity to adjust the ooefficient of thermal expansion (CTE) of such materials.It is especially important to obtain controllable thermal expansion in isotropic compounds.Herein,we report the preparation,crystal structure,and controllable thermal expansion in double ReO3-type (Fe1-xNix)ZrF6 solid solutions.(Fe1-xNix)ZrF6 exhibits full range solubility.A controllable thermal expansion of (Fe1-xNix)ZrF6 could be achieved by the chemical substitution of Ni2+ for Fe2+ over a wide range of CTE from -3.24 x 10-6 to +18.23 x 10-6 K-1 (300-675 K).In particular,zero thermal expansion was obtained for the composition (Fe0.5Ni0.5)ZrF6.As a kind of typical framework structure,the transverse thermal vibrations of fluorine atoms are expected to play a critical role in the thermal expansion behavior of double-ReO3 compounds.This study presents a potential method to tune the thermal expansion of NTE (negative thermal expansion) families which have an open framework structure.关键词
固溶体/氟化物/氧化铼/热膨胀调控/零膨胀Key words
Solid solution/Fluorides/ReO3/Controllable thermal expansion/Zero thermal expansion分类
化学化工引用本文复制引用
许家乐,胡磊,王璐,邓金侠,陈骏,邢献然..(Fe1-xNix)ZrF6固溶体晶体结构与可调控的热膨胀性质[J].物理化学学报,2018,34(4):339-343,5.基金项目
The project was supported by the National Natural Science Foundation of China (91422301,21231001) and the Fundamental Research Funds for the Central Universities,China (FRF-TP-14-012C1)国家自然科学基金(91422301,21231001)和中央高校基础科研业务费专项基金(FRF-TP-14-012C1)资助项目 （91422301,21231001）
