Thermomechanical properties of calcium series perovskite-type oxides

Structural and thermoelastic properties of CaTiO3 perovskite between 7K and 400K

“…3 which can be seen to fit the whole temperature range well (V 0 = 222.4475(6)Å 3 , D1 = 323(7) K, ( 1 /K 0 ) = 1.79 × 10 −11 Pa −1 , D2 = 1022(40) K, ( 2 /K 0 ) = 7.1 × 10 −12 Pa −1 , r 2 = 0.99999). The weighted average of the two Debye temperatures, 789 K, is in excellent agreement with that determined from the longitudinal and shear sound velocities, 760(3) K [15]. Using a value of 170.9 GPa for the isothermal bulk modulus of CaTiO 3 [23], the Grüneisen parameters are found to be 3.1 and 1.2 for 1 and 2 respectively.…”

“…Using a value of 170.9 GPa for the isothermal bulk modulus of CaTiO 3 [23], the Grüneisen parameters are found to be 3.1 and 1.2 for 1 and 2 respectively. At high temperatures, the volume thermal expansion coefficient is estimated to be 4.0 × 10 −5 K −1 , close to three times the average linear thermal expansion coefficient measured by dilatometry in the temperature interval 298-1273 K [15].…”

“…The understanding and measurement of phase equilibria, phase stability and thermoelastic properties of transuranic element containing CaTiO 3 is therefore of great importance in the nuclear industry [11][12][13][14][15]. In this paper we investigate the low temperature structural evolution of the parent phase CaTiO 3 and determine a set of thermoelastic properties in the framework of a modified Debye model.…”

High‐temperature mechanical and thermal properties of Ca1−xSrxZrO3solid solutions

“…The coefficient of thermal expansion (CTE) is also an important parameter for thermal barrier coatings since the CTE mismatch between coatings and substrates is the origin of the thermal stress which greatly influences the service life of coatings. The measured CTEs of Ca 1− x Sr x ZrO 3 together with the values of CaZrO 3 and SrZrO 3 in literature are illustrated in Figure . The CTEs of Ca 1− x Sr x ZrO 3 raise with temperature increment (from 8.15 × 10 −6 ‐8.63 × 10 −6 /K at 373 K to 10.75 × 10 −6 ‐11.23 × 10 −6 /K at 1473 K), which also indicates no phase transition occurred in this temperature range.…”

An efficient CaTiO₃ nano sonocatalyst toward the dye degradation under ultrasonic irradiation

“…19)25) In particular, CaTiO 3 has been shown to exhibit a pronounced photocatalytic activity toward the degradation of organic pollutions. 19), 20) Moreover, the CB and VB edges of CaTiO 3 straddle the redox potentials of H + /H 2 and O 2 /H 2 O, 21) thus making it have the ability to photocatalytically split water into H 2 and O 2 . In this work, we demonstrate that CaTiO 3 can be used as an excellent sonocatalyst for the dye degradation.…”