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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Structure and dissolution of CaO-ZrO2-TiO2-Al2O3-B2O3-SiO2 glass .2.
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Structure and dissolution of CaO-ZrO2-TiO2-Al2O3-B2O3-SiO2 glass .2.

机译：CaO-ZrO2-TiO2-Al2O3-B2O3-SiO2玻璃的结构与溶解.2。

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摘要

The purpose of this study is to determine the structure and dissolution resistance of the CaO-ZrO2-TiO2-Al2O3-B2O3-SiO2 glass fabricated in Part (I). Vibrational spectroscopy indicated the structure units of the glass are SiO4, TiO4, BO4 and their groupings for thermal exposure up to 750 degrees C. The surface of an etched sample contained amorphous-phase separated droplets which developed in multiple stages and clustered upon heating near the glass transition temperature, T-g (ca. 640 degrees C), Room temperature (30 +/- 1 degrees C) dissolution of glass powders in aqueous solutions (pH = 0, 1, 3, 5, 10 and 12) showed size-dependent leaching of cations Ca, Al, Ti and Zr, with Zr the most dissolution-resistant component. The leaching of the cations Ca and Al was linear with time in the initial dissolution stage and each had a logarithmic dissolution rate versus pH dependence: the slope being negative in acidic while positive in basic condition with a minimum dissolution rate in the pH range of 6.5 to 8.5. Dissolution of a partially devitrified glass slab under acidic (pH = 0) or basic (pH = 12) conditions indicated that glass/crystal (ZrO2 derived) interfaces were preferentially dissolved with the crystals being more resistant. An Al-depleted layer and ridge-free hillocks developed on the glass surface at pH = 12 and 0, respectively.
机译：这项研究的目的是确定部分（I）中制造的CaO-ZrO2-TiO2-Al2O3-B2O3-SiO2玻璃的结构和耐溶解性。振动光谱表明，玻璃的结构单元是SiO4，TiO4，BO4，并且它们的组合物在高达750℃的温度下热暴露。蚀刻后的样品表面含有无定形相分离的液滴，这些液滴分多个阶段发展，并在加热到附近时聚集。玻璃化转变温度，Tg（约640摄氏度），室温（30 +/- 1摄氏度），玻璃粉在水溶液（pH = 0、1、3、5、10和12）中的溶解情况与尺寸有关阳离子Ca，Al，Ti和Zr的浸出，其中Zr是最耐溶解的成分。在初始溶解阶段，阳离子Ca和Al的浸出量与时间呈线性关系，并且溶解度与pH值呈对数关系：酸性下的斜率为负，而在碱性条件下的斜率在pH值为6.5时最小。至8.5。在酸性（pH = 0）或碱性（pH = 12）条件下溶解部分失透的玻璃平板表明，玻璃/晶体（ZrO2衍生）界面优先溶解，且晶体更具抵抗力。在pH = 12和0的玻璃表面上分别形成了贫铝层和无脊岗丘。

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