科研之友
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摘要
A material with the formula ZrMgMo3O12 having negative thermal expansion is presented and characterized. It is shown that ZrMgMo3O12 crystallizes in an orthorhombic symmetry with space group Pnma(62) or Pna2(1) (33) and exhibits negative thermal expansion in a large temperature range (alpha iota = -3.8 x 10(-6) K-1 from 300 K to 1000 K by x-ray diffraction and alpha iota = - 3.73 x 10(-6) K-1 from 295 K to 775 K by dilatometer). ZrMgMo3O12 remains the orthorhombic structure without phase transition or decomposition at least from 123 K to 1200 K and is not hygroscopic. These properties make it an excellent material with negative thermal expansion for a variety of applications.
- 出版日期2013-12
- 单位郑州大学
