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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 >Glass transition and fragility of iron phosphate glasses. II. Effect of mixed-alkali
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Glass transition and fragility of iron phosphate glasses. II. Effect of mixed-alkali

机译：磷酸铁玻璃的玻璃化转变和易碎性。二。混合碱的影响

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Changes in the heat capacity from the glass state (C-pg) to the supercooled liquid state (C-pl), DeltaC(p) = C-pl - C-pg, the ratio of heat capacities, C-pl/C-pg, width of the glass transition temperature, DeltaT(g), and activation enthalpy for structural relaxation, DeltaH*, in the glass transition region for the xNa(2)O-(20 - x)R2O-32Fe(2)O(3)-48P(2)O(5) (R. = K and Cs) mol% glasses, where x = 0, 5, 10, 15, 20, have been investigated using differential scanning calorimetry. DeltaC(p) and C-pl/C-pg are in the range of 57-68 J/mol/K and 1.41-1.51, respectively, for the xNa(2)O-(20 - x)R2O-32Fe(2)O(3)-48P(2)O(5) (R. = K and Cs) mol% glasses, which suggests that the alkali-containing iron phosphate glasses, similar to the alkali-free binary iron phosphate glass, also belong in the category of fragile liquids. Adding 20 mol% of alkali oxides to the 40Fe(2)O(3)-60P(2)O(5) (mol%) composition does not change the glass transition behavior or melt fragility very much, but does increase the glass transition temperature, T-g. No mixed-alkali effect is observed on any glass transition properties for the iron phosphate glass. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 18]
机译：从玻璃态（C-pg）到过冷液态（C-pl）的热容变化，DeltaC（p）= C-pl-C-pg，热容比C-pl / C- pg，玻璃化转变温度的宽度DeltaT（g）和xNa（2）O-（20-x）R2O-32Fe（2）O（的玻璃化转变区域中用于结构弛豫的活化焓DeltaH *使用差示扫描量热法研究了3）-48P（2）O（5）（R. = K和Cs）mol％的玻璃，其中x = 0、5、10、15、20。对于xNa（2）O-（20-x）R2O-32Fe（2），DeltaC（p）和C-pl / C-pg分别在57-68 J / mol / K和1.41-1.51的范围内。 ）O（3）-48P（2）O（5）（R. = K和Cs）mol％玻璃，这表明与无碱二元磷酸铁玻璃相似，含碱磷酸铁玻璃也属于在易碎液体类别中。向40Fe（2）O（3）-60P（2）O（5）（mol％）组成物中添加20 mol％的碱性氧化物不会很大程度地改变玻璃化转变行为或熔体脆性，但会增加玻璃化转变温度，Tg。在磷酸铁玻璃的任何玻璃化转变性能上均未观察到混合碱效应。 （C）2003 Elsevier Science B.V.保留所有权利。 [参考：18]

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