好词典

permittivity

UK //ˌpɜːmɪˈtɪvɪti//US //ˌpɜːrmɪˈtɪvɪti//

词源

源自19世纪拉丁语 'permittere'(允许)+ '-ivity'(性质后缀),字面意为'允许通过的性质',反映其作为电通量传导能力的度量。

noun

❶ 介电常数,衡量电介质在电场中储存电能能力的物理量。数值越大表示材料在电场中极化程度越高。

“The permittivity of water is much higher than that of air.”

(水的介电常数远高于空气。)

“Engineers measure the permittivity of materials to design better capacitors.”

(工程师通过测量材料的介电常数来设计更优质的电容器。)

同义词:dielectric constant, electric permittivity, capacitivity

常见短语

relative permittivity — 相对介电常数,表示某材料介电能力与真空介电能力的比值,是材料电学特性的重要参数。

“The relative permittivity of glass is typically between 3 and 10.”

(玻璃的相对介电常数通常在3到10之间。)