Crystallization of zirconia doped basalt fibers

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• 作者：Ya.V. Lipatov ; I.V. Arkhangelsky ; A.V. Dunaev ; S.I. Gutnikov ; M.S. Manylov ; B.I. Lazoryak
• 关键词：Basalt fiber ; Zirconia doping ; Crystallization mechanism ; Non-isothermal kinetics ; High temperature stability
• 刊名：Thermochimica Acta
• 出版年：10 January, 2014
• 年：2014
• 卷：575
• 期：Complete
• 页码：238-243
• 全文大小：1086 K

文摘

Crystallization of basalt fibers containing 0-7 wt% ZrO₂ was studied. Fibers were drawn from basalt glasses and annealed in air at different temperatures. Phase composition of obtained samples was determined by XRD. Kinetics of crystallization processes was investigated by DSC. Kinetic models and parameters were estimated for crystallization of spinel-like phase, pyroxene and plagioclase using model-free analysis. It was found that doping of fibers with 1-3 wt% ZrO₂ increased Arrhenius parameters of aluminosilicate crystallization. When the zirconia content was 5-7 wt% the crystallization mechanism significantly changed. This phenomenon resulted in increasing of fiber thermal stability.