Crystallinity determination of partially crystallized glasses of the systems SiO2Li2OZnO and SiO2Li2OTiO2Al2O3: A comparison of different methods

  • Benedetti A
  • Bottarelli M
  • Fagherazzi G
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Abstract

The modified Ruland method [1] has been applied to two glassy systems having the following chemical compositions (mol%):SiO266.75, Li2O23.45, ZnO 8.00, K2O 1.00, P2O50.80; and SiO270, Li2O 17, TiO210, Al2O33, in order to determine the crystallinity of partially crystallized materials obtained from the initial glasses. For the first system it has been shown that the two main approximations present in the relations of the method are well justified and this result has a general validity. For the second system a comparison has been carried out with the crystallinity data obtained by simply measuring the XRD peak heights "in situ", at high temperature. The results are ingood agreement. We have shown that, when a tolerably low overlapping among the XRD peaks of different crystalline phases is present, multi-phase transformation can be studied. © 1985.

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Authors

  • A. Benedetti

  • M. Bottarelli

  • G. Fagherazzi

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