Resonance character of polymorphic transformations for the phase transition α′ L → β-Ca2SiO4

Dashkevich, R. Ya.; Aleksandrov, A.

doi:10.3103/s1067821207060053

Cited by 4 publications

(1 citation statement)

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“…However, only in the case of a 0 -Sr 2 SiO 4 and a 0 -Ba 2 SiO 4 , the crystal structure remains the same; furthermore, in this case, a solid solution series exists [15]. The respective isostructural Ca-phase is stable above 700°C [12,21]. The compound Ca 2 SiO 4 has a different crystal structure.…”

Section: Phasementioning

confidence: 99%

Thermal expansion behavior of SrSiO3 and Sr2SiO4 determined by high-temperature X-ray diffraction and dilatometry

Thieme

Rüssel

2015

J Mater Sci

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Strontium silicates are widely known as high thermal expansion materials, especially from glass ceramic sealing applications. However, the thermal expansion behavior of the pure crystalline phases is still unknown. Hence, SrSiO 3 and Sr 2 SiO 4 were characterized with dilatometry and high-temperature X-ray diffraction. The measured coefficients of thermal expansion (CTE) of Sr 2 SiO 4 are strongly anisotropic and depending on the crystallographic direction vary between 3.9 and 16.6 9 10 -6 K -1 . SrSiO 3 has a somewhat higher isotropy of thermal expansion than Sr 2 SiO 4 . The CTE in the respective crystallographic directions differs by only 1.9 9 10 -6 K -1 . The mean CTE is between 10.9 and 12.8 9 10 -6 K -1 for SrSiO 3 and Sr 2 SiO 4 , respectively. A comparison of the Srphases with Ba-and Ca-phases with the same stoichiometry is given with respect to the crystal structures and the CTE.

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Section: Phasementioning

confidence: 99%