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热力发电  2015 

不同制焦条件下煤焦的介电特性研究

, PP. 11-16

Keywords: 煤种,煤焦,介电特性,测试频率,制焦温度

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Abstract:

选用3种不同煤阶的煤分别制成800~1200℃温度下的煤焦试样,通过同轴探头法测试煤焦的介电特性参数,考察测量频率、制焦温度、煤种对介电特性的影响。结果表明:煤焦的复介电常数实部、虚部、介质损耗角正切均随频率的增加而减小,随制焦温度的升高而增大;低频时测试频率和制焦温度对煤焦介电特性影响较大,频率升高影响作用减弱;不同煤种生成的煤焦介电特性差异明显,无烟煤煤焦的介电性能参数最大,烟煤煤焦的介电性能参数最小。

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