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High Resistance Materials Tables

May 5, 2008 in Electrical, Reference

Liquids

20 C	OHM	-M
	min	max
Benzene	10¹¹	10¹²
Transformer oil	10¹⁰	10¹³
Gasoline	10¹⁰	10¹³
Castor oil	10⁸	10¹⁰
Acetone	10⁴	10⁵
Ethanol	10⁴	10⁵
Distilled water	10³	10⁴

Glass At High Temperature

200 C	OHM -M
Sodium Pyrex	2 * 10⁶
Potassium Pyrex	8 * 10⁹
Lead glass	2 * 10¹¹

Effect Of Contamination On Surface Resistivity

70% RH	CONTAMINATED	CLEAN
Window glass	2 * 10⁸	10¹²
Fused quartz	2 * 10⁸	10¹³

Relation Of Resistivity With RH % And Temp

MATERIAL	70% RH 20 deg C	0% RH 100 deg C	0% RH 20 deg C
Marble	10^{6 -} 10⁸	10^{10 -} 10¹²	10^{12 -} 10¹⁴
Wood	10^{6 -} 10⁷	10^{10 -} 10¹²	10^{11 -} 10¹³
Vulcanized fibers fibers	10^{6 -} 10⁹	10^{8 -} 10⁹	10^{11 -} 10¹²
MATERIALS	SOLIDS OHM -M

Solids

MATERIALS	OHM -M
Polyethylene	10¹⁷
Poly propylene	10¹⁷
PVC	10¹⁸
Polyurethane	10¹⁵
Asbestos fiber + phenol	10⁸
Mica + phenol	10¹²
Glass-fiber + polyester	10¹²
Glass-fiber + epoxy	10¹⁴

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