Dielectric Characteristics of Coals and Preheated Coals
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Dielectric constants and loss factors of various coals and preheated coals were measured in the frequency range of 100kc/s-30mc/s, and following results were obtained.<BR>1. Dielectric constant of coal decreased, with increasing C% up to d.a.f. C % of 85 percent, beyond which dielectric constant rapidly increased.<BR>2. Dielectric constant of preheated coal slightly increased up to 600°C, beyond which increased rapidly with increase of preheating temperature.<BR>3. Dielectric loss factor of preheated coal changed sine-curve-like against the frequency.<BR>4. The relationship between dielectric constant and loss factor of coal heated at 650°C was in conformity with cole-cole circular arc rule.<BR>5. The relationship between dielectric characteristics and volatile matter of preheated coal depended upon the rank of coal or heating condition.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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