High temperature phase transitions of SrZrO3

The thermal properties of SrZrO3 were evaluated from room temperature to 1400 K. SrZrO3 was prepared by the solid state reaction of SrCO3 and ZrO2 powders. X-ray diffraction measurements showed that the sample has a perovskite structure. The sample for the measurements of the thermal properties was prepared from a sintered body. The heat capacities of SrZrO3 were measured using a differential scanning calorimeter (DSC) in a high purity argon atmosphere. The phase transitions of SrZrO3 were confirmed at higher temperature. The linear thermal expansion of SrZrO3 was measured using a dilatometer. The thermal expansion data exhibited an excess volume increment that was related to one of the phase transitions confirmed by DSC. (C) 2002 Elsevier Science B.V. All rights reserved.