Glass-ceramics obtained by the crystallization of basalt

The possibility to obtain glass-ceramics from basalt from the locality on Vrelo (Kopaonik mt.) is shown in this paper. The parent rock was ground to fraction -0.4 +0.1 mm, and then melted at 1250 - 1300?C. The crystallization melted bazaltic glass at 950?C during the time interval of 3 hours caused synthesis of a glass-ceramic material with a microstructure that has excellent mechanical properties according to the determined dynamic modulus of elasticity and uniaxial compresive strength. The phase composition of the obtained glass ceramic material was determined by XRPD using Rietveld refinement and SEM. Two phases were found: pyroxene which corresponds to omphacite of the composition (Na0.199 K0.180 Ca0.471 Mg0.249)1.1(Mg0.271Fe0.299Al0.430)1.0(Si1.704Ti0.046Al0.250)2.0O6 and glass with an approximate relationship 69:31.

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Formation of a porous structure in a granulated glass ceramic material from zeolite-bearing rock with alkali additives

Glass and Ceramics ◽

10.1007/s10717-006-0085-x ◽

2006 ◽

Vol 63 (7-8) ◽

pp. 227-229 ◽

Cited By ~ 1

Author(s):

V. I. Vereshchagin ◽

S. N. Sokolova

Keyword(s):

Porous Structure ◽

Ceramic Material ◽

Glass Ceramic ◽

Glass Ceramic Material

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Thermolysis of fibreglass polyester composite and reutilisation of the glass fibre residue to obtain a glass–ceramic material

Journal of Analytical and Applied Pyrolysis ◽

10.1016/j.jaap.2011.10.003 ◽

2012 ◽

Vol 93 ◽

pp. 104-112 ◽

Cited By ~ 49

Author(s):

F.A. López ◽

M.I. Martín ◽

F.J. Alguacil ◽

J. Ma. Rincón ◽

T.A. Centeno ◽

...

Keyword(s):

Ceramic Material ◽

Glass Fibre ◽

Glass Ceramic ◽

Glass Ceramic Material ◽

Polyester Composite

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Investigation of Thermal Expansion of a Glass–Ceramic Material with an Extra-Low Thermal Linear Expansion Coefficient

International Journal of Thermophysics ◽

10.1007/s10765-008-0477-y ◽

2008 ◽

Vol 29 (5) ◽

pp. 1896-1905 ◽

Cited By ~ 3

Author(s):

T. A. Kompan ◽

A. S. Korenev ◽

A. Ya. Lukin

Keyword(s):

Thermal Expansion ◽

Ceramic Material ◽

Expansion Coefficient ◽

Glass Ceramic ◽

Linear Expansion ◽

Glass Ceramic Material ◽

Linear Expansion Coefficient ◽

Thermal Linear Expansion ◽

Thermal Linear Expansion Coefficient

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Impact of Morphology and Microstructure on the Mechanical Properties of Ge-As-Pb-Se Glass Ceramics

Applied Sciences ◽

10.3390/app10082836 ◽

2020 ◽

Vol 10 (8) ◽

pp. 2836 ◽

Cited By ~ 1

Author(s):

Rashi Sharma ◽

Rebecca Welch ◽

Myungkoo Kang ◽

Claudia Goncalves ◽

Cesar Blanco ◽

...

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Vickers Hardness ◽

Glass Ceramic ◽

Volume Fraction ◽

Glass Ceramics ◽

Post Heat Treatment ◽

Base Glass ◽

Parent Glass ◽

Crystal Phases

The impact of base glass morphology and post heat-treatment protocol on the mechanical properties (Vickers hardness and Young’s modulus) of a multi-component glass-ceramic was examined. Two parent chalcogenide glasses with identical composition but varying morphology (homogeneous and phase separated) were evaluated for their mechanical properties following identical thermal processing to induce crystallization. The nucleation and growth rates of the starting materials were compared for the two glasses, and the resulting crystal phases and phase fractions formed through heat treatment were quantified and related to measured mechanical properties of the glass ceramics. The presence of a Pb-rich amorphous phase with a higher crystal formation tendency in the phase-separated parent glass significantly impacted the volume fraction of the crystal phases formed after heat-treatment. Pb-rich cubic crystal phases were found to be dominant in the resulting glass ceramic, yielding a minor enhancement of the material’s mechanical properties. This was found to be less than a more moderate enhancement of mechanical properties due to the formation of the dominant needle-like As2Se3 crystallites resulting from heat treatment of the homogeneous, commercially melted parent glass. The greater enhancement of both Vickers hardness and modulus in this glass ceramic attributable to the high-volume fraction of anisotropic As2Se3 crystallites in the post heat-treated commercial melt highlights the important role base glass morphology can play on post heat-treatment microstructure.

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