Heat capacity, thermal conductivity, and thermal expansion of barium titanate-based ceramics
Heat capacity, thermal conductivity, and thermal expansion of barium titanate-based ceramics
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DOI：
10.1016/j.tca.2004.02.008
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发表时间：
2004-09-10
影响因子：
3.5
通讯作者：
He, Y
中科院分区：
文献类型：
--
作者：
He, Y
钛酸钡（BaTiO3）基陶瓷在电子工业中广泛用作多层陶瓷电容器（mlcc）的介质层。在这项研究中，用差示扫描量热法（DSC）测定了两种不同的batio3基陶瓷材料的热容作为温度的函数。利用阿基米德原理在室温下测量了这些材料的密度。利用这些实验值，利用热盘传感器在室温下测定每种材料的热扩散率和热导率，这是一种快速测量热导率的瞬态技术。最后，利用热力学分析（TMA）确定了这些材料在-50 ~ 250℃范围内的热膨胀线性系数。这些数据可用于模拟片状电容器在各种条件下的应力和可靠性性能。(C) 2004 Elsevier B.V.版权所有
Barium titanate (BaTiO3)-based ceramics have been used widely as dielectric layers in manufacturing multilayer ceramic capacitors (MLCCs) in the electronics industry. In this study, the heat capacities of two different BaTiO3-based ceramic materials were determined as a function of temperature using differential scanning calorimetry (DSC). The densities of these materials were measured at room temperature using Archimedes' principle. Using these experimental values, the thermal diffusivity and thermal conductivity of each material were determined at room temperature with a hot disk sensor, which is a transient technique for rapid thermal conductivity measurement. Finally, the linear coefficients of thermal expansion of these materials were determined using thermomechanical analysis (TMA) from -50 to 250 degreesC. All these data are useful in modeling the stress and the reliability performance of these chip capacitors under various conditions. (C) 2004 Elsevier B.V. All rights reserved.