Kinetic study of the crystallization processes of some decorative ceramic glazes |
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| Authors: | Păcurariu C Lazău R I Lazău I Stoleriu Ş |
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| Institution: | (1) Faculty of Industrial Chemistry and Environmental Engineering, University Politechnica of Timişoara, P-ţa Victoriei No. 2, 300006 Timişoara, Romania;(2) Faculty of Applied Chemistry and Materials Science, S.I.M.O. Dept., University Politechnica of Bucharest, PO BOX 12-134, Bucharest, 011061, Romania |
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| Abstract: | A kinetic study of the crystallization processes was performed for some decorative ceramic glazes in the PbO-SiO2-Na2O-K2O-CaO(BaO)-Al2O3-B2O3 system with addition of 10% TiO2 and ZnO. The crystallization kinetics has been studied in non-isothermal conditions using DTA technique. The apparent activation
energies of the crystallization processes were calculated using the Kissinger method. The main crystalline phase, which provides
the decorative effect, is rutile. This has been identified by X-ray diffraction and it is clearly visible in the optical microscopy
images taken in transmitted light, as needle-like or even prismatic crystals arranged in radial-fibrous aggregates. |
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| Keywords: | crystallized glazes crystallization kinetics rutile crystallization |
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