Zero Thermal Expansion in (Al2x(HfMg)1−x)(WO4)3

Low-thermal-expansion materials in a wide temperature range are expected to be used in electronic devices, optical devices, and nanoscale devices. The authors have tried to fabricate a single-phase zero-thermal-expansion material. A new single-phase ceramic material, (Al2x(HfMg)1−x)(WO4)3, could be produced from a mixture of a negative-thermal-expansion material, (HfMg)(WO4)3, and a positive-thermal-expansion material, Al2(WO4)3. At x=0.15 this material shows nearly zero thermal expansion from room temperature to 800°C.

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