TY - JOUR

T1 - Thermal decomposition of K1 - XCsxBSi2O6 borosilicates

AU - Derkacheva, E.S.

AU - Krzhizhanovskaya, M.G.

AU - Bubnova, R.S.

AU - Filatov, S.K.

AU - Ugolkov, V.L.

PY - 2013

Y1 - 2013

N2 - Thermal decomposition of mixed K1 - xCsxBSi2O6 borosilicates by the methods of thermal analysis, annealing, and quenching, with the following refining of the structure by the Rietveld method on the example of solid solutions with x = 0.3 and 0.7 crystallizing in the space groups and respectively, is studied. It is shown that the solid-phase decomposition of borosilicates proceeds with the release of the gaseous phase and formation of cristobalite and/or tridymite of SiO2 at the final stage. In this case the solid solutions enriched by potassium decompose in one stage with the formation of SiO2, while the solutions enriched by cesium decompose with the formation of the intermediate zeolite-like CsBSi5O12 borosilicate, which also decomposes during further thermal treatment. According to the data of the structure, the refining of K1 - xCsxBSi2O 6 solid solutions obtained by thermal treatment at 1000°C for 20, 65, 80, and 100 h, it is detected that for the samples with x = 0.3 and 0.7 the parameter of the cubic c

AB - Thermal decomposition of mixed K1 - xCsxBSi2O6 borosilicates by the methods of thermal analysis, annealing, and quenching, with the following refining of the structure by the Rietveld method on the example of solid solutions with x = 0.3 and 0.7 crystallizing in the space groups and respectively, is studied. It is shown that the solid-phase decomposition of borosilicates proceeds with the release of the gaseous phase and formation of cristobalite and/or tridymite of SiO2 at the final stage. In this case the solid solutions enriched by potassium decompose in one stage with the formation of SiO2, while the solutions enriched by cesium decompose with the formation of the intermediate zeolite-like CsBSi5O12 borosilicate, which also decomposes during further thermal treatment. According to the data of the structure, the refining of K1 - xCsxBSi2O 6 solid solutions obtained by thermal treatment at 1000°C for 20, 65, 80, and 100 h, it is detected that for the samples with x = 0.3 and 0.7 the parameter of the cubic c

U2 - 10.1134/S1087659613060035

DO - 10.1134/S1087659613060035

M3 - Article

SP - 659

EP - 663

JO - Glass Physics and Chemistry

JF - Glass Physics and Chemistry

SN - 1087-6596

IS - 6

ER -