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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 >Structural properties of Cr2O3-Fe2O3-P2O5 glasses, Part I
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Structural properties of Cr2O3-Fe2O3-P2O5 glasses, Part I

机译：Cr2O3-Fe2O3-P2O5玻璃的结构特性，第一部分

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摘要

The structural properties of xCr(2)O(3)-(40-x)Fe2O3-60P(2)O(5), 0 <= x <= 10 (mol%) glasses have been investigated by Raman and Mossbauer spectroscopies, X-ray diffraction (XRD) and differential scanning calorimetry (DSC). The Raman spectra show that the addition of up to 5.3 mol% Cr2O3 does not produce any changes in the glass structure, which consists predominantly of pyrophosphate, Q(1), units. This is in accordance with O/P approximate to 3.5 for these glasses. The increase in glass density and T-g that occurs with increasing Cr2O3 suggests the strengthening of glass network. The Mossbauer spectra indicate that the Fe2+/Fe-tot ratio increases from 0.13 to 0.28 with increasing Cr2O3 content up to 5.3 mol%, which can be related to an increase in the melting temperature from 1423 to 1473 K. After annealing, the 20Cr(2)O(3)-30Fe(2)O(3)-60P(2)O(5) (mol%) sample was partially crystallized and contained crystalline beta-CrPO4 and Fe-3(P2O7)(2). The SEM and AFM micrographs of the partially crystallized sample revealed randomly distributed crystals embedded in a homogeneous glass matrix. EDS analysis indicated that the glass matrix was rich in Fe2O3 (39.6 mol%) and P2O5 (54.9 mol%), but contained only 5.5 mol% of Cr2O3. These results suggest that the maximum solubility of chromium in these iron phosphate melts is 5.5 mol% Cr2O3. (C) 2007 Elsevier B.V. All rights reserved.
机译：通过Raman和Mossbauer光谱学研究了xCr（2）O（3）-（40-x）Fe2O3-60P（2）O（5），0 <= x <= 10（mol％）玻璃的结构特性， X射线衍射（XRD）和差示扫描量热法（DSC）。拉曼光谱表明，最多添加5.3 mol％的Cr2O3不会在玻璃结构中产生任何变化，该结构主要由焦磷酸盐Q（1）单元组成。对于这些眼镜，这符合O / P大约为3.5。随着Cr2O3含量的增加，玻璃密度和T-g的增加表明玻璃网络的增强。 Mossbauer光谱表明，随着Cr2O3含量增加至5.3 mol％，Fe2 + / Fe-tot比从0.13增加到0.28，这可能与熔融温度从1423增加到1473 K有关。退火后，20Cr（ 2）O（3）-30Fe（2）O（3）-60P（2）O（5）（mol％）样品已部分结晶，并包含结晶β-CrPO4和Fe-3（P2O7）（2）。部分结晶的样品的SEM和AFM显微照片揭示了嵌入均匀玻璃基质中的随机分布的晶体。 EDS分析表明，玻璃基质富含Fe 2 O 3（39.6mol％）和P 2 O 5（54.9mol％），但是仅包含5.5mol％的Cr 2 O 3。这些结果表明铬在这些磷酸铁熔体中的最大溶解度为5.5 mol％Cr2O3。 （C）2007 Elsevier B.V.保留所有权利。

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