Thermal, structure and morphological properties of lithium disilicate glasses doped with copper oxide and their glass–ceramic derivatives
Thermal, structure and morphological properties of lithium disilicate glasses doped with copper oxide and their glass–ceramic derivatives
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DOI：
10.1016/j.jnoncrysol.2012.05.026
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发表时间：
2012-08
影响因子：
3.5
通讯作者：
H. El-Batal;Z. Mandouh;H. Zayed;S. Marzouk;Gihan M. Elkomy;A. Hosny
中科院分区：
文献类型：
--
作者：
H. El-Batal;Z. Mandouh;H. Zayed;S. Marzouk;Gihan M. Elkomy;A. Hosny
本研究旨在研究和比较掺杂氧化铜的二硅酸锂玻璃及其玻璃陶瓷衍生物的结构和形态特性。所有样品的密度测量均在室温下通过阿基米德法进行测量。差示扫描量热分析用于测定所有玻璃的玻璃化转变温度（Tg）和结晶温度（Tc）。观察到玻璃化转变温度随着 CuO 浓度的增加而降低，这表明在玻璃网络中形成了非桥氧键。 X 射线分析图显示，结晶偏硅酸锂相作为玻璃陶瓷衍生物中的主要相，并且观察到它们的微晶尺寸随着 CuO 的增加而减小。实验红外吸收数据表明，由于结构构建 SiO4 单元而存在特征振动带，与传统结晶硅酸盐观察到的振动类似。扫描电子显微镜研究显示二硅酸锂玻璃的玻璃质性质以及相应玻璃陶瓷衍生物的独特晶体形态特征。
This research aims to investigate and compare the structural and the morphological properties of both lithium disilicate glasses doped with copper oxide and their glass–ceramic derivatives. Density measurements were measured for all samples by Archimedes method at room temperature. Differential scanning calorimetric analysis was used to determine the glass transition temperature (Tg) and crystallization temperature (Tc) for all glasses. The glass transition temperature was observed to decrease with increasing CuO concentration indicating the formation of non-bridging oxygen bonds in the glass network. X-ray analysis patterns reveal the appearance of crystalline lithium metasilicate phase as the main phase within the glass–ceramic derivatives, and their crystallite sizes were observed to decrease as the CuO increased. Experimental infrared absorption data indicate the existence of characteristic vibrational bands due to structural building SiO4units in resemblance to the same vibrations observed from traditional crystalline silicates. Scanning electron microscopic investigations show the vitreous nature for lithium disilicate glasses and the distinct crystalline morphological features for the corresponding glass–ceramic derivatives.