Title: Negative Thermal Expansion in (HfMg)(WO<sub>4</sub>)<sub>3</sub>
Abstract: A single‐phase material (HfMg)(WO 4 ) 3 with an orthorhombic structure, A 2 (WO 4 ) 3 ‐type tungstate, has been successfully prepared for the first time by the calcination of HfO 2 , MgO, and WO 3 , substituting Hf 4+ and Mg 2+ for A 3+ cations in A 2 (WO 4 ) 3 . The new material shows a negative thermal expansion coefficient of approximately −2 ppm/°C from room temperature to 800°C. The mechanism of negative thermal expansion is assumed to be the same as that of Sc 2 (WO 4 ) 3 .
Publication Year: 2004
Publication Date: 2004-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 60
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