%0 Journal Article
%T Corrosion Mechanism of a Dental Glass-Ceramic in Artificial Saliva and Sol-Gel Derived Corrosion-Resistant Coatings<br>齿科微晶玻璃的腐蚀机理及溶胶-凝胶防腐蚀涂层研究
%A Anusavice KJ
%A Clark AE
%A <br>陈晓峰
%A 王迎军
%A 赵娜如
%A AnusaviceK.J
%A ClarkA.E
%J 无机材料学报
%D 2003
%I Science Press
%X The corrosion mechanism of a dental glass-ceramic: fluorcanasite by oral fluid and the corrosion-resistant ability of different sol-gel derived coatings on the glass-ceramic were investigated in vitro using SEM/EDAX, ICP and FTIR techniques. The results obtained show that the corrosion of the glass-ceramic by the oral fluid comes of a rapid ion exchange between HsO+ in the solution and Na+ (K+) in the surface layer of the glass-ceramic, which results in a loose Si02-rich layer on the glass-ceramic. Part of SiO2 component dissolves into the solution in the form of Si(OH)4 because Si-O-Si network of SiO2-rich layer is broken by attack of H2O. A lot of surface defects are formed on the surface due to the corrosion of water, which decrease the strength and service life of the glass-ceramic in an oral environment. The final reaction product on surface of the glass-ceramic is hydroxyl-carbonate apatite (HCA). Sol-gel derived Al2O3 coating has a significant ability to enhance the chemical durability of the dental glass-ceramic.
%K sol-gel technique
%K glass-ceramics
%K artificial saliva
%K corrosion<br>溶胶－凝胶法
%K 微晶玻璃
%K 人工唾液
%K 腐蚀
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=ABC0063016AF57E1C73EF43C8D2212BD&aid=1F9D5EEF0D589A8B&yid=D43C4A19B2EE3C0A&vid=13553B2D12F347E8&iid=38B194292C032A66&sid=4AB4178709047BE3&eid=A3F93694B058F76C&journal_id=1000-324X&journal_name=无机材料学报&referenced_num=4&reference_num=20