Muscovite Mica Sheet

Muscovite Mica Sheet | High-Temperature Electrical Insulation Sheet

Muscovite Mica Sheets are premium rigid electrical insulation materials made from high-purity muscovite mica paper bonded with a small percentage of silicone resin and cured under high temperature and pressure. With mica content above 90%, these sheets provide outstanding electrical insulation, thermal stability, and flame resistance in extreme heat environments.

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Muscovite Mica Sheet | High-Temperature Electrical Insulation Sheet

Muscovite mica sheets are specially designed for applications where high temperature meets electrical current. They retain excellent dielectric strength even at elevated temperatures and exhibit low smoke generation, high mechanical strength, and resistance to thermal cycling. These properties make them ideal for both industrial heating equipment and household electrical appliances.

Rigid mica sheets are commonly used during furnace construction, heating element insulation, and in appliances such as microwave ovens, hair dryers, toasters, irons, heaters, and band heaters, where long-term heat resistance and safety are critical.

Product Details

Product Name

Muscovite Mica Sheet

Material

Muscovite Mica + Silicone Resin

Mica Content

> 90%

Bond Content

< 10%

Insulation Class

Class H (180 °C electrical rating)

Color

White / Light Silver

Technical Properties – Muscovite Mica Sheets (N-HP-5-Y)

Property	Value
Mica Paper Type	Muscovite
Mica Content	> 90%
Bond Content	< 10%
Density	1.6 – 2.45 g/cm³
Heat Loss @ 500 °C	< 1%
Heat Loss @ 700 °C	< 2%
Flexural Strength	> 180 MPa
Dielectric Strength	> 20 kV/mm
Water Absorption	< 1%
Flame Resistance	UL 94 V-0
Insulation Resistance (23 °C)	10¹⁷ Ω·cm
Insulation Resistance (500 °C)	10¹² Ω·cm
Continuous Heat Resistance	500 – 550 °C
Intermittent Heat Resistance	800 °C

NEMA, IEC, Mil Spec Material Comparative Table
NEMA	IEC	Mil Spec	Resin	Substrate
NEMA G-10	EPGC 201, 21*	MIL-I-24768/2 GEE	Epoxy	Glass Cloth
NEMA FR4	EPGC 202, 23*	MIL-I-24768/27 GEE-F	Epoxy	Glass Cloth
NEMA G-11	EPGC 203, 22*	MIL-I-24768/3 GEB	Epoxy	Glass Cloth
NEMA FR5	EPGC 204	MIL-I-24768/28 GEB-F	Epoxy	Glass Cloth
—	EPGC 205	—	Epoxy	Glass Cloth
—	EPGC 306	—	Epoxy	Glass Cloth
—	EPGC 307	—	Epoxy	Glass Cloth
—	EPGC 308	—	Epoxy	Glass Cloth
—	EPGC 309	—	Epoxy	Glass Cloth
—	EPGC 310	—	Epoxy	Glass Cloth
—	EPGC 311	—	Epoxy	Glass Cloth
—	EPGM 203	—	Epoxy	Glass Mat
—	EPPC 301	—	Epoxy	Polyester Cloth
NEMA G-5	MFGC 201, 20*	MIL-I-24768/8 GMG	Melamine	Glass Cloth
NEMA G-9	MFGC 201	MIL-I-24768/1 GME	Melamine	Glass Cloth
NEMA C	PFCC 201, 23*	MIL-I-24768/16 PBM	Phenolic	Cotton Cloth
NEMA CE	PFCC 202, 22*	MIL-I-24768/14 FBG	Phenolic	Cotton Cloth
NEMA L	PFCC 203	MIL-I-24768/15 FBI	Phenolic	Cotton Cloth
NEMA LE	PFCC 204, 21, 24	MIL-I-24768/13 FBE	Phenolic	Cotton Cloth
NEMA X	PFCP 201, 21*	MIL-I-24768/12 PBM	Phenolic	Cellulosic Paper
NEMA XP	PFCP 201	MIL-I-24768/19 PBM-P	Phenolic	Cellulosic Paper
NEMA XXX	PFCP 204	MIL-I-24768/10 PBE	Phenolic	Cellulosic Paper
NEMA XX	PFCP 202, 23*	MIL-I-24768/11 PBG	Phenolic	Cellulosic Paper
NEMA XXP	PFCP 203	MIL-I-24768/21 PBG-P	Phenolic	Cellulosic Paper
NEMA XXXP	PFCP 204	MIL-I-24768/22 PBE-P	Phenolic	Cellulosic Paper
NEMA XPC	PFCP 207	MIL-I-24768/20 PBM-C	Phenolic	Cellulosic Paper
NEMA G-3	PFGC 201, 21*	MIL-I-24768/18 GPG	Phenolic	Glass Cloth
NEMA GPO-1	UPGM 201	MIL-I-24768/4	Polyester	Glass Mat
NEMA GPO-2	UPGM 202	MIL-I-24768/5	Polyester	Glass Mat
NEMA GPO-3	UPGM 203	MIL-I-24768/6	Polyester	Glass Mat
—	UPGM 205	—	Polyester	Glass Mat
—	PIGC 301	—	Polyimide	Glass Cloth
NEMA G-7	SIGC 201, 21*	MIL-I-24768/17 GSG	Silicone	Glass Cloth