Thermal Expansion of SrF₂ at Elevated Temperatures

Abstract

The X-ray method was used to determine the linear thermal expansion coefficient of SrF, in the temperature range from 301 to 1173 K. A comparison of the thermal expansion coefficients of CaF,, SrF, and BaF, a t T > 300 K shows that the degree of lattice anharmonicity in the alkaline earth fluorides decreases with increasing mass of the alkaline earth atom. The results for the thermal expansion of SrF, are used to discuss the temperature dependence of the lattice mismatch in the SrFJInP film-substrate system.

Temperature‐Dependent Bulk Modulus Model for Solid Single Crystals

“…Reference temperature is all set as room temperature. The material parameters used in the model calculations for these solid single crystals are given in Table . In Figure a, our model predictions are very close to the experimentally‐measured adiabatic bulk modulus of α‐Al 2 O 3 .…”

Magnetic anisotropy in antiferromagnetic hexagonal MnTe

“…Above room temperature, the thermal expansion coefficient of SrF 2 is 2.0 × 10 −5 K −1 (Ref. 34), which is only 20% larger than the value of 1.62×10 −5 K −1 (Ref. 35) of MnTe, for which reason the cooling of the sample from the growth temperature to room temperature does not induce a significant thermal strain in the films due to nearly the same thermal contraction.…”

Single-step fabrication of transparent SrF2 ceramics for optical applications

“…9,11 Processing from the melt comes with its own difficulties though, as internal porosity becomes a significant issue due to the large volume change SrF2 upon solidification from the liquid phase. SrF2 has both a high coefficient of thermal expansion (CTE) 8 (1.88×10 -5 K -1 at 300K) 12 and a high-temperature solid state phase change 13 in addition to the typical shrinkage upon crystallization. Since the optical absorption and refractive index changes resulting from the presence of secondary phases or residual porosity result in heat generation and beam distortion, respectively, both defect types must be minimized to prevent damage to the gain medium when operating at high energies.…”