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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Effect of sintering temperature on the properties of modified mechanical alloyed CaCu3Ti4O12
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Effect of sintering temperature on the properties of modified mechanical alloyed CaCu3Ti4O12

机译：烧结温度对改性机械合金化CaCu3Ti4O12性能的影响

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摘要

This paper presents the effects of calcination time and sintering temperature on the properties of CaCu3Ti4O12. Electroceramic material of CaCu3Ti4O12 was prepared using a modified mechanical alloying technique that covers several processes, which are preparation of raw material, mixing and ball milling for 5 hours, calcination, pellet forming and, sintering. The objective of this modified technique is to enable the calcination and sintering processes to be carried out at a shorter time and lower temperature. The x-ray diffraction (XRD) analysis result shows that a single-phase of CaCu3Ti4O12 was completely formed by calcination at 750degC for 12 hours. Meanwhile, the grain size of a sample sintered at 1050degC for 24 hours is extremely large, in the range of 20-50 mum obtained from field emission scanning electron microscopy (FESEM) images. The dielectric constant value of 14,635 was obtained at 10 kHz by impedance (LCR) meter in the sintered sample at 1050degC. However, the dielectric constant value of samples sintered at 900 and 950degC is quite low, in the range of 52-119.
机译：本文介绍了煅烧时间和烧结温度对CaCu3Ti4O12性能的影响。 CaCu3Ti4O12的电陶瓷材料是使用改良的机械合金化技术制备的，该技术涵盖了多个过程，这些过程包括原材料的制备，混合和5个小时的球磨，煅烧，造粒和烧结。该改进技术的目的是使煅烧和烧结过程能够在较短的时间和较低的温度下进行。 X射线衍射（XRD）分析结果表明，通过在750℃下煅烧12小时，CaCu3Ti4O12的单相完全形成。同时，在1050℃下烧结24小时的样品的晶粒尺寸非常大，在从场发射扫描电子显微镜（FESEM）图像获得的20-50μm的范围内。通过阻抗（LCR）仪在1050℃下在烧结样品中在10kHz下获得14,635的介电常数值。然而，在900和950℃下烧结的样品的介电常数值非常低，在52-119的范围内。

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