Experimental;
Physics;
Center,;
Institute;
of;
High;
Energy;
Physics,;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100049,;
China;
College;
of;
Chemistry;
and;
Chemical;
Engineering,;
Graduate;
University;
of;
the;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100049,;
China;
China;
Institute;
of;
Atomic;
Energy,;
Beijing;
102413,;
China;
College;
of;
Chemistry,;
Beijing;
Normal;
University,;
Beijing;
100875,;
China;
热膨胀性能; 晶体结构; 固溶; 高温X射线衍射; Rietveld方法; 热膨胀系数; 正交结构; 负热膨胀;