A Negative Thermal Expansion Material of ZrMgMo₃O₁₂

【摘要】 A material with the formula ZrMgMo₃O₁₂having negative thermal expansion is presented and characterized.It is shown that ZrMgMo₃O₁₂crystallizes in an orthorhombic symmetry with space group Pnma（62）or Pna2₁（33）and exhibits negative thermal expansion in a large temperature range(α₁=-3.8×10^-6K^-1from 300K to1000K by x-ray diffraction andα₁=-3.73×10^-6K^-1from 295K to 775K by dilatometer).ZrMgMo₃O₁₂remains 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.更多还原

【Abstract】 A material with the formula ZrMgMo₂ O₁₂ having negative thermal expansion is presented and characterized.It is shown that ZrMgMo₃O₁₂ crystallizes in an orthorhombic symmetry with space group Pnma（62） or Pna2₁（33）and exhibits negative thermal expansion in a large temperature range(α_l =-3.8× 10^-6K^-1 from 300K to1000K by x-ray diffraction and α_l =-3.73 × 10^-6K_-1 from 295K to 775K by dilatometer).ZrMgMo₃O₁₂remains 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.更多还原