Crystallization of Cristobalite in Sodium Borosilicate Glass in the Presence of Cr2O3

被引:3
|
作者
Konon, Marina [1 ]
Polyakova, Irina G. [1 ]
Mazur, Anton S. [2 ]
Saratovskii, Artem S. [1 ,3 ]
Danilovich, Dmitry P. [3 ]
Alikin, Mikhail [3 ]
机构
[1] Russian Acad Sci, Grebenshchikov Inst Silicate Chem, St Petersburg 199034, Russia
[2] St Petersburg State Univ, Magnet Resonance Res Ctr, St Petersburg 199034, Russia
[3] Tech Univ, St Petersburg State Technol Inst, St Petersburg 190013, Russia
基金
俄罗斯科学基金会;
关键词
borosilicate glass; phase separation; crystallization; Cr2O3; eskolaite; cristobalite; polytypism; RAY PHOTOELECTRON-SPECTROSCOPY; TRANSITION-METAL; NA2O-B2O3-SIO2-FE2O3; SYSTEM; PHYSICOCHEMICAL PROPERTIES; LUMINESCENT PROPERTIES; SPECTRAL PROPERTIES; OPTICAL-PROPERTIES; PHASE-SEPARATION; BORATE GLASSES; CHROMIUM IONS;
D O I
10.3390/ma16145016
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Glass containing chromium is a promising material for use in various modern fields of application (laser technology, optoelectronic devices, and luminescent resources). Chromium oxides are well-known nucleating agents that can cause crystallization. One of the most commonly observed crystalline phases in silicate glasses is cristobalite, which lowers their mechanical strength, leading to the destruction of the material. The objective of this investigation was to study in detail the crystallization of cristobalite in sodium borosilicate glass in the presence of 2 mol% Cr2O3, depending on the thermal history of the glass. The glass was studied using XRD, SEM, EPR, FTIR-spectroscopy, XPS, and solid-state NMR. Eskolaite, alpha-Cr2O3, which had crystallized in this glass, stimulated the bulk crystallization of cristobalite at 550 degrees C after isothermally treating it for 72 h, due to the phase-separated structure of the glass with its interpenetrating phase morphology. Polytypism, resulting in the incorporation of alkalis into the cristobalite structure, was observed. Cr(2)O(3)causes the catalytic crystallization of cristobalite at an extremely low temperature, which is at lower concentrations and temperatures than in glass containing Fe2O3 with a similar composition. The crystal growth rate and the incubation time for the crystallization of cristobalite were roughly estimated.
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页数:17
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