Paper Title:
Influence of Amount of Nitrogen on Crystallisation of Y-SiAlON Glasses: In Situ XRD Analysis
  Abstract

Y-SiAlON glasses of composition 36.5 Y: 42.3 Si: 21.2 Al with different amounts of N (0, 5, 8, 15 and 22 in e/o) were produced by melting appropriate mixtures of powders under flowing nitrogen at 1715°C. This composition is known to give B-phase (Y2SiAlO5N) on crystallisation at temperatures below 1050°C. In this work, the effect of nitrogen in the starting glass composition on the crystalline phases formed is discussed. High temperature in-situ XRD analysis was performed on powdered glass samples up to 1150°C by using a Philips X’pert PRO MPD (Multi Purpose Diffractometer) with a HTK1200 Oven Camera (Anton Paar, Austria). As expected, the results show that different nitrogen contents affect the crystalline phases formed. In all glasses, yttrium apatite silicate forms first, followed by crystallisation of B-phase. The phase transformation from B-phase to Iw-phase (Y3Si2Al[O,N10] i.e. 10 e/o N) takes place at relatively low temperatures (1050°C) for the lower nitrogen containing samples (5 and 8 e/o), whereas, the transformation does not take place for the glasses with higher nitrogen contents even at the maximum temperature studied (1150°C). This work also confirms that there is a correlation between the temperature where the first crystals appear and the amount of nitrogen in the starting glass.

  Info
Periodical
Edited by
Hai-Doo Kim, Hua-Tay Lin and Michael J. Hoffmann
Pages
293-298
DOI
10.4028/www.scientific.net/KEM.287.293
Citation
E. Dolekcekic, M. J. Pomeroy, S. Hampshire, "Influence of Amount of Nitrogen on Crystallisation of Y-SiAlON Glasses: In Situ XRD Analysis ", Key Engineering Materials, Vol. 287, pp. 293-298, 2005
Online since
June 2005
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: K. Hurrell-Gillingham, Ian M. Reaney, I.M. Brook, P.V. Hatton
Abstract:Glass-ionomer cements (GIC) have been used in dentistry for over 30 years. In the past ten years they have also been developed for use as...
799
Authors: Akemi A. Nogiwa-Valdez, Dora A. Cortés-Hernández, J.M. Almanza-Robles, Alejandra Chávez-Valdez
Abstract:Zirconia-alumina composites with additions of a CaO-SiO2 glass are prepared by uniaxial pressing and sintering. In order to promote...
193
Authors: Shirley K. Fong, Lee A. Gerrard, Brian L. Metcalfe, Ian W. Donald
Abstract:To immobilize the halide and actinide ions present in four Intermediate Level Waste (ILW) waste-streams the following process has been...
2018
Authors: Gultekin Goller, Ipek Akin
Abstract:The aim of this study is to investigate the crystallization behavior and in-vitro bioactivity character of glass ceramics having 3:7 weight...
261
Authors: Mickael Palard, J. Combes, Eric Champion, Didier Bernache-Assollant
Abstract:This work aimed at preparing dense and monophasic silicated hydroxyapatite ceramics over the range 0 ≤ x ≤ 1.0 mol of silicon. The synthesis...
1059