Na2O-MgO-Al2O3-SiO2建筑装饰微晶玻璃的研究
Glass(2013)
Abstract
利用浇铸法制备了MgO-Al2O3-SiO2微晶玻璃.采用示差扫描量热法(DSC)、X射线衍射(XRD)、扫描电子显微镜(SEM)等分析方法,研究NMAS微晶玻璃玻璃组成中Al2O3/SiO2对微晶玻璃的析晶和性能的影响.结果表明:玻璃中析出的主晶相为镁橄榄石.随Al2O3/SiO2的减小,镁橄榄石的衍射峰强度逐渐减弱,次晶相为α-堇青石.C3、C4中还有很少量的顽辉石相.微晶玻璃热膨胀系数逐渐升高,抗折强度和硬度逐渐减小.C1在600℃时的热膨胀系数为7.01×10-6K-1,抗折强度为115 MPa,硬度达为8.0 GPa.
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o-mgo
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