Mica Sheet | The Ultra-High Temperature Electrical Insulation Barrier, Terminator of Flame and Arc

In applications that must simultaneously face extreme high temperatures, high-voltage electric fields, and potential arc threats, traditional insulation materials often fall short. Our Mica Sheet is designed to address this. It is a laminate composed of high-quality mica paper and a high-performance silicone resin or silicone binder. Mica, as a natural mineral, gives the product unparalleled high-temperature resistance, fire resistance, arc resistance, and excellent electrical insulation properties, making it an indispensable core material for electrical safety in industrial motors, high-voltage appliances, metallurgical equipment, and induction heating furnaces.

Core Advantages & Key Features

• Exceptional High-Temperature and Fire Resistance Mica sheet can withstand continuous temperatures of over 500°C and will not burn or produce toxic fumes when exposed to direct flame. This allows it to effectively prevent heat transfer and fire spread, providing a crucial safety guarantee for equipment and personnel.
• Superior Arc and Corona Resistance In high-voltage environments, mica sheet effectively resists erosion from electrical arcs and corona discharge. Its high dielectric strength and unique mineral structure allow it to quickly extinguish arcs, preventing insulation breakdown and ensuring the long-term, reliable operation of high-voltage equipment.
• Robust Mechanical Properties Mica sheet maintains its physical integrity at high temperatures, with good tensile and compressive strength. This allows it to easily withstand the mechanical stress in motor slots or windings, ensuring the structural stability of the equipment.
• Multiple Specifications and Customizability We offer various types of mica sheets, including Muscovite and Phlogopite, as well as products of different thicknesses, sizes, and rigidity, to meet your precise requirements for different insulation classes (e.g., Class C insulation) and application scenarios.

Technical Specifications

• Thickness: 0.1mm – 2.0mm

• Width: up to 1000mm

• Working Temperature: 500℃–1000℃

• Color: Silver, Golden, or Milky White

Typical Applications

• Motors and Transformers: For slot insulation and insulation barriers between coils of motor windings.
• Electric Heating Equipment: As a skeletal and insulating material for heating elements in induction heating furnaces, rice cookers, and hair dryers.
• High-Voltage Switches and Relays: Used as separators and insulating gaskets for high-voltage insulation and arc isolation.
• Metallurgy and Power: As a fireproof insulation barrier in high-temperature equipment like smelting furnaces and welding machines.

Client Testimonials & Case Studies

“Our induction furnace operates for long periods at extremely high temperatures. Traditional insulation materials would carbonize and fail after a few months of use. Since we switched to this mica sheet, it has maintained perfect insulation and structural integrity at high temperatures, significantly extending our equipment’s maintenance cycle and improving safety.” — Technical Director, an induction heating equipment manufacturer

Frequently Asked Questions (FAQ)

• Q: What is the difference between a mica sheet and regular insulation tape? A: Mica sheet is a mineral-based insulating material whose core advantage is ultra-high temperature and fire resistance. Most insulation tapes are polymer-based and would quickly melt or burn at the working temperatures of a mica sheet. Mica sheet is primarily used to provide structural insulation and a physical barrier.
• Q: What are Muscovite and Phlogopite mica? How should I choose? A: They are two different types of natural mica minerals. Muscovite has better dielectric properties, while Phlogopite has higher temperature resistance. You typically choose Phlogopite for applications requiring higher temperature resistance and Muscovite for applications with stricter electrical performance requirements.
• Q: Is mica sheet brittle? How should I process it? A: Mica sheet has some flexibility in thinner gauges but is indeed more brittle than plastics. We recommend using professional tools for cutting and punching to achieve clean edges and precise dimensions.