TY - JOUR

T1 - New solid solutions Ca3B2 + xSi1–xO8–x/2

AU - Yukhno, V. A.

AU - Krzhizhanovskaya, M. G.

AU - Bubnova, R. S.

PY - 2017/9/1

Y1 - 2017/9/1

N2 - 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).

AB - 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).

KW - borosilicates

KW - solid solutions

KW - thermal expansion

UR - http://www.scopus.com/inward/record.url?scp=85031494808&partnerID=8YFLogxK

U2 - 10.1134/S1087659617050194

DO - 10.1134/S1087659617050194

M3 - Article

AN - SCOPUS:85031494808

VL - 43

SP - 484

EP - 487

JO - Glass Physics and Chemistry

JF - Glass Physics and Chemistry

SN - 1087-6596

IS - 5

ER -