Thermal Conductivity of Yttria-Gadolinia Solid Solution Optical Ceramics in the Temperature Range 50–300 K
2022; Multidisciplinary Digital Publishing Institute; Volume: 10; Issue: 6 Linguagem: Inglês
10.3390/inorganics10060078
ISSN2304-6740
AutoresStanislav Balabanov, Timofey Evstropov, Dmitry Permin, Olga Postnikova, Alexander Praded, П. А. Попов,
Tópico(s)Solid State Laser Technologies
ResumoThis study looked at the thermal conductivity of translucent (Y1−xGdx)2O3 (where 0 ≤ x ≤ 1) solid solution ceramics in the temperature range from 50 K to 300 K. The samples were obtained by hot pressing from high-purity nanopowders at 1600 °C, no sintering additives were used. Compositions with cubic syngony (x ≤ 0.7) and a monoclinic one (x ≥ 0.9) were investigated. Furthermore, a dense sample of cubic Gd2O3 with a LiF sintering additive was obtained and its thermal conductivity was determined (k = 11.7 W/(m K) at 300 K). It was shown that in the range of solid solution ceramic compositions 0.2 ≤ x ≤ 0.7, the thermal conductivity was practically unchanged and close to the value k ≈ 5 W/(m K) at 300 K.
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