The Dielectric Constant of Mica
The Dielectric Constant of Mica
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云母的介电常数
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通讯作者：
J. R. Weeks
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作者：
J. R. Weeks
云母的介电常数。-测定了18个云母样品的常数，这些样品的厚度从0.005英寸到0.073英寸不等，包括12个不同的等级。将每片置于两个汞电极之间，用屏蔽电容和电导电桥以每秒1，000次循环的交流电测定由此形成的电容器的电容。结果发现，虽然有明显可见的空气膜的厚片具有低介电常数，但没有这种膜的厚片给出了相当一致的结果，从6.4到9.3，平均为8.1。当一个厚的片被分裂，较薄的片有较高的常数，除了在加拿大琥珀的样品的情况下。功率损耗在云母冷凝器是太小，以确定准确地与所使用的设备，但染色比明确的云母。
Dielectric Constant of Mica.---The constant was determined for 18 samples of mica, varying in thickness from 0.005 to 0.073 inch and including 12 different grades. Each sheet was placed between two mercury electrodes and the capacity of the condenser thus formed was determined with a shielded capacity and conductance bridge using alternating current at 1,000 cycles per second. It was found that while thick sheets with plainly visible air films had low dielectric constants, those without such films gave fairly consistent results, running from 6.4 to 9.3 with an average of 8.1. When a thick sheet was split, the thinner sheets had higher constants except in the case of a sample of Canadian amber.Power Loss in Mica Condensers was too small to determine accurately with the apparatus used, but was higher for stained than for clear micas.