New solid solutions Ca3B2 + xSi1–xO8–x/2
- 作者: Krzhizhanovskaya M.G.1, Bubnova R.S.2,1, Yukhno V.A.2
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隶属关系:
- St. Petersburg State University
- Grebenshchikov Institute of Silicate Chemistry
- 期: 卷 43, 编号 5 (2017)
- 页面: 484-487
- 栏目: Short Communications
- URL: https://journals.rcsi.science/1087-6596/article/view/216222
- DOI: https://doi.org/10.1134/S1087659617050194
- ID: 216222
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详细
New solid solutions Ca3B2 + xSi1–xO8–x/2 based on monoclinic borosilicate β-Ca3B2SiO8 are prepared using crystallization from a melt. The homogeneity range of solid solutions (0 < х ≤ 0.86) is determined and the thermal behavior of solid solution Ca3B2.4Si0.6O7.8 is studied using high-temperature X-ray powder diffraction: a reversible β ↔ α polymorphic transition is discovered in the solid solution (х = 0.4) at 550°C, decomposition begins in the solid state above 940°C with the formation of CaSiO3. The thermal expansion of both modifications is anisotropic: 20–540°C (α11 = 17, α22 = 16, α33 = 0, αV = 32 × 10−6°C−1) and 560–900°C (α11 = 15, α22 = 24, α33 = 3, and αV = 42 × 10−6°C−1).
作者简介
M. Krzhizhanovskaya
St. Petersburg State University
Email: rimma_bubnova@mail.ru
俄罗斯联邦, St. Petersburg, 199034
R. Bubnova
Grebenshchikov Institute of Silicate Chemistry; St. Petersburg State University
编辑信件的主要联系方式.
Email: rimma_bubnova@mail.ru
俄罗斯联邦, St. Petersburg, 199034; St. Petersburg, 199034
V. Yukhno
Grebenshchikov Institute of Silicate Chemistry
Email: rimma_bubnova@mail.ru
俄罗斯联邦, St. Petersburg, 199034
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