Influence of calcite in a ceramic body on its thermophysical properties
Influence of calcite in a ceramic body on its thermophysical properties
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DOI：
10.1007/s10973-013-3084-5
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发表时间：
2013-03
影响因子：
4.4
通讯作者：
J. Kováč;A. Trník;I. Medved’;L. Vozár
中科院分区：
文献类型：
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作者：
J. Kováč;A. Trník;I. Medved’;L. Vozár
我们研究了热膨胀，质量变化，热容，和热扩散率和导热性的陶瓷体（10和20质量%），没有废方解石含量，使用TDA，TG，DTA，DSC，和闪光法。根据测量方法，（a）对绿色样品进行等温或线性加热至600、1，050或1，100 °C;（B）在室温下对在100、200、.、1，100 °C下预热的样品进行测量。在情况（a）中，我们表明，在950 °C下钙长石生成期间，高方解石含量可能使能量消耗加倍。另一方面，方解石对最终收缩有轻微的积极影响，对150-550 °C范围内的热导率有相当大的影响，甚至降低50%。在情况（B）中，方解石对最终收缩的积极影响比情况（a）高约10倍。方解石对热扩散率的明显影响发生在仅高于600 °C的情况（B）中，导致10和20质量%方解石含量的相当不同的行为。
We study thermal expansion, mass changes, heat capacity, and thermal diffusivity and conductivity for a ceramic body with (10 and 20 mass%) and without waste calcite content, using the TDA, TG, DTA, DSC, and flash method. The measurements were performed (a) for green samples either isothermally or by a linear heating up to a temperature 600, 1,050, or 1,100 °C, depending on the measurement method; (b) at the room temperature for samples preheated at 100, 200,…, 1,100 °C. In case (a) we show that a high calcite content may double the energy consumption during the anorthite creation at 950 °C. On the other hand, calcite has a slight positive effect on the final contraction and quite substantial effect on the thermal conductivity in the range 150–550 °C, decreasing it even by 50 %. In case (b) a positive impact of calcite on the final contraction is about 10 times higher than in case (a). A clear effect of calcite on the thermal diffusivity occurs in case (b) only above 600 °C, resulting in a rather different behavior for the 10 and 20 mass% calcite content.