Journal of Non-Crystalline Solids, ( ISI ), Volume (361), No (1), Year (2013-2) , Pages (70-77)

Title : ( The role of TiO2, ZrO2, BaO and SiO2on the mechanical properties and crystallization behavior offluorapatite–mullite glass–ceramics )

Authors: Sahar Mollazadeh Beidokhti , Bijan Eftekhari Yekta , Jafar Javad Pour , Abbas Youssefi , Tahere jafarzade kashi ,

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Abstract

The effect of TiO2,ZrO2, BaO and extra addition of silica on the crystallization behavior, microstructure and mechanical properties of an apatite–mullite based glass–ceramic system were investigated by means of X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The precipitated crystalline phases were fluorapatite [Ca10(PO4)6F2] and mullite [Al6Si2O13], which apart from the extra bearing SiO2specimen were rod-like in the other specimens. The rod-like crystalline phases\' lengths were small, i.e.b20μm, in the TiO2 and BaO containing glass–ceramics, but small addition of ZrO2enhanced the length of crystalline phases to approximately 50μm. Theflexural strength and fracture toughness of the prepared glasses and glass–ceramics were also studied. The results showed that the additive oxides affected both parameters differently. The highest fracture strength and fracture toughness values belonged to the TiO2and BaO containing glass–ceramics which contained smaller crystal size. The mechanical properties of the prepared glass–ceramic samples did not differ strongly and/or were even decreased by addition of ZrO2and extra amount of SiO2

Keywords

Additives; Mechanical properties; Fluorapatite–mullite glass–ceramic
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@article{paperid:1038330,
author = {Mollazadeh Beidokhti, Sahar and Bijan Eftekhari Yekta and Jafar Javad Pour and Abbas Youssefi and Tahere Jafarzade Kashi},
title = {The role of TiO2, ZrO2, BaO and SiO2on the mechanical properties and crystallization behavior offluorapatite–mullite glass–ceramics},
journal = {Journal of Non-Crystalline Solids},
year = {2013},
volume = {361},
number = {1},
month = {February},
issn = {0022-3093},
pages = {70--77},
numpages = {7},
keywords = {Additives; Mechanical properties; Fluorapatite–mullite glass–ceramic},
}

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%0 Journal Article
%T The role of TiO2, ZrO2, BaO and SiO2on the mechanical properties and crystallization behavior offluorapatite–mullite glass–ceramics
%A Mollazadeh Beidokhti, Sahar
%A Bijan Eftekhari Yekta
%A Jafar Javad Pour
%A Abbas Youssefi
%A Tahere Jafarzade Kashi
%J Journal of Non-Crystalline Solids
%@ 0022-3093
%D 2013

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