Substitution and crystallisation of fluortremolite glasses with needle-like crystal morphology
Source abstract
Abstract
The effect of Ca2+ and Fe2+/3+ substitutions for Mg2+ on the crystallisation of fluortremolite (Ca2Mg5Si8O22F2) glass ceramic was investigated by the melting of selected glass compositions at 1550 °C and thermal treatment at 950 °C. Ca2+ is essential to generate the favoured crystal phase fluortremolite. The needle-like crystal morphology can be achieved by adding iron oxide and results in a fluoractinolite crystal phase. The DTA, XRD, SEM and TEM methods were used to identify the mechanism of phase separation of these high fluorine-containing compositions and understand the generation of the selected crystal phase. The substitution with chromium, indium, manganese and nickel offers a variety of properties for this fluoramphibole glass ceramic and as high-strength material for technical application.
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Research context
OpenAlex topics: Glass properties and applications · Pigment Synthesis and Properties · Bone Tissue Engineering Materials
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