›› 2012, Vol. 24 ›› Issue (3): 0-516.

• 论文 •    

茶叶介电特性的研究

闫建伟1,牛素贞2,尹杰2,宋勤飞2,何林1,*   

  1. 1贵州大学 机械工程学院,贵州 贵阳 550025;2贵州大学 农学院,贵州 贵阳 550025
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-05-24 发布日期:2012-05-24

Dielectric properties of tea leaves

YAN Jian-wei;NIU Su-zhen;YIN Jie;SONG Qin-fei;HE Lin;*   

  1. 1College of Mechanical Engineering, Guizhou University, Guiyang 550025, China;2 College of Agriculture, Guizhou University, Guiyang 550025, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-05-24 Published:2012-05-24

摘要: 采用TH2816B型LCR数字测试仪对茶叶的介电特性进行了研究,结果表明:在10~200 kHz频率范围内,茶叶的相对介电常数随频率增加而减小,介电损耗因数随着频率的增大先减小而后略有增加;在200 kHz时,当茶叶的温度为20~60℃和含水率为5.3%,7.6%,10.2%,13.8%,16.0%,20.0%,25.0%且逐渐增加时,相对介电常数和介质损耗因数均呈增大的趋势。

关键词: 茶叶, 介电特性, 相对介电常数, 介电损耗因数, 含水率

Abstract: The dielectric properties of tea leaves were measured with precision TH2816B inductance capacitance resistance (LCR) meter over a temperature range of 20-60℃ and a frequency span of 10-200 kHz. The results showed that the relative dielectric constant decreased linearly with increasing frequency, but the dielectric loss factor decreased and then increased slightly. The relative dielectric constant and dielectric loss factor both increased with increasing temperature between 20℃ and 60℃ and moisture content (5.3%,7.6%, 10.2%, 13.8%, 16.0%, 20.0%, 25.0%) at given 200 kHz frequency.

Key words: tea leaves, dielectric properties, relative dielectric constant, dielectric loss factor, moisture content