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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 >Application of the IR transmission method and the Mossbauer effect to the crystallization of calcium gallate glass
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Application of the IR transmission method and the Mossbauer effect to the crystallization of calcium gallate glass

机译：红外透射法和莫斯鲍尔效应在没食子酸钙玻璃结晶中的应用

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摘要

Crystallization of infrared-light transmitting (CaO)-Ca-40 . 60Ga(2)O(3) glass caused by heat treatment, Co-60 gamma-ray irradiation and YAG laser irradiation was investigated. The X-ray diffraction (XRD) data revealed that a CaGa4O7 phase was precipitated by heat treatment. The Avrami index (n) of 1.7 +/- 0.2 obtained from 'the Fourier transform infrared (FT-IR) transmission method' combined with the Johnson-Mehl-Avrami (JMA) equation indicated that the crystallization proceeded three dimensionally. The activation energy (E(a)) of 7.2 +/- 0.3 eV obtained from the JMA plot was equal to that obtained from the Kissinger plot in the differential thermal analysis: E(a) = 7.1 +/- 0.2 eV. Mossbauer spectra of 40CaO . 59Ga(2)O(3) .(Fe2O3)-Fe-57 samples showed the oxidation of iron from Fe2+ to Fe3+. Mossbauer spectra of the 40CaO . 59Ga(2)O(3) .(Fe2O3)-Fe-57 samples irradiated with the YAG laser also showed an oxidation of Fe2+ to Fe3+. In case of Co-60 gamma-ray irradiated samples, however, a reduction of the iron from Fe3+ to Fe2+ was observed. This result indicates that Fe3+ occupies substitutional sites of Ga3+ in the gallate glass.
机译：红外光透射（CaO）-Ca-40的结晶。研究了由热处理，Co-60γ射线辐照和YAG激光辐照引起的60Ga（2）O（3）玻璃。 X射线衍射（XRD）数据表明，CaGa4O7相通过热处理沉淀。从“傅里叶变换红外（FT-IR）透射法”结合Johnson-Mehl-Avrami（JMA）方程获得的Avrami指数（n）为1.7 +/- 0.2，表明结晶过程是三维进行的。从JMA曲线获得的7.2 +/- 0.3 eV的活化能（E（a））等于在差热分析中从Kissinger曲线获得的活化能：E（a）= 7.1 +/- 0.2 eV。 40CaO的Mossbauer谱。 59Ga（2）O（3）。（Fe2O3）-Fe-57样品显示铁从Fe2 +氧化为Fe3 +。 40CaO的Mossbauer光谱。用YAG激光辐照的59Ga（2）O（3）。（Fe2O3）-Fe-57样品也显示Fe2 +氧化为Fe3 +。但是，在用Co-60γ射线辐照的样品中，观察到铁从Fe3 +还原为Fe2 +。该结果表明Fe3 +在没食子酸盐玻璃中占据了Ga3 +的取代位点。

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