Abstract
Although glass is known not to crystallise below the glass transition temperature (Tg), some block specimens of metaphosphate glasses such as Ca(PO3)2, Sr(PO3)2 and Ba(PO3)2 have been found to crystallise easily at temperatures considerably lower than Tg; however, thin films of the glasses do not exhibit this behaviour1–3. The intrinsic characteristics of Ca(PO3)2 considered here suggest that under stress the rate of crystal growth depends on thickness, and that long poly-crystalline fibres may be produced in which the crystals are orientated towards the direction of elongation.
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References
Abe, Y., Arahori, T., Naruse, A. J. Am. ceram. Soc. 59, 487–490 (1976).
Abe, Y. & Saito, H. J. ceram. Soc., Jap. 85, 45–52 (1977).
Abe, Y., Natuse, A. & Arahori, T. J. ceram. Soc. Jap. 82, 509–510 (1974).
Doremus, R. H. Glass Science, 92–93 (Wiley, New York, 1973).
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Abe, Y. Abnormal characteristics in crystallisation of Ca(PO3)2 glass. Nature 282, 55–56 (1979). https://doi.org/10.1038/282055a0
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DOI: https://doi.org/10.1038/282055a0
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