复合聚合物中陶瓷粉末的介电常数

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI:10.1109/CEIDP.2011.6232756

C. V. Bouanga, S. Savoie, H. Couderc, M. Frechette, É. David

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引用次数: 5

摘要

本研究的目的是在广泛的频率范围内测量陶瓷粉末作为聚合物复合材料添加剂的复介电常数。介绍了氧化铝和氮化硼粉末的介电响应。在研究频率范围内(10-1 Hz ~ 10 kHz)介电常数的变化表明，粉末表面存在对水的吸收。因此，采用了不同的处理方法:在100°C下加热48小时和在室温下真空。经处理后，观察到低频时介电常数值有显著变化。通过对比处理前后的结果，真空下测得的粉末在室温下的介电响应在所研究的频率范围内是稳定的。利用粉末介电常数的测量值，利用混合定律来估计块状材料的介电常数。讨论了这种情况。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The dielectric permittivity of ceramic powders used in composite polymers

The aim of this study is to measure the complex dielectric constant over a wide range of frequencies for ceramic powders often used as additives in polymer composites. The dielectric responses of alumina and boron nitride powders are presented. The variation of the dielectric constant in the studied frequency range (10-1 Hz to 10 kHz) showed that there is absorption of the water on the surface of the powder. Therefore, different treatments were applied: heating at 100°C for 48 hours and under vacuum at room temperature. A significant change on the value of the permittivity at low frequency has been observed after treatment. By comparing the results obtained before and after treatment, the dielectric response of the powder measured under vacuum showed stability over the studied frequency range at room temperature. The measured values of the permittivity of the powder were used to estimate those of the bulk material using a mixing law. This situation is discussed.

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2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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