Calcined mica paper

Calcined mica paper is a high-performance insulating material made from natural mica flakes through a special calcination, grinding, and papermaking process. The calcination process (carried out at temperatures of 800-1000℃) removes volatile impurities and enhances the material's thermal stability, making it far superior to uncalcined mica paper in terms of high-temperature resistance and electrical insulation. Its thin and flexible sheet form facilitates cutting, lamination, and wrapping, making it a primary material in industrial insulation systems.

Product Category:

Mica Paper

Keywords:

Yuefeng Mica

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Description

Commodity name: Calcined mica paper

Key Properties of Calcined Mica Paper

Excellent High-Temperature Resistance Maintains stable performance at continuous operating temperatures of 600-900℃, with short-term resistance up to 1000℃, 200-300℃ higher than standard mica paper.

Superior Electrical Insulation Performance Features a breakdown strength of 15-30 kV/mm and a volume resistivity of ≥10¹⁴ Ω·cm, ensuring reliable insulation for high-voltage equipment even under thermal stress.

Low Thermal Conductivity Thermal conductivity ≤0.15 W/(m·K) (at 25℃), effectively reducing heat transfer and contributing to improved energy efficiency in high-temperature systems.

Mechanical Durability Possesses good tensile strength (≥3 MPa) and tear resistance, maintaining integrity during handling and installation.

Chemical Stability Resistant to corrosion from most acids, alkalis, and organic solvents, and is non-hygroscopic, ensuring long-term performance in harsh environments.

Applications of Calcined Mica Paper

Electrical Engineering Used as insulation material in motors, transformers, and generators, especially in high-temperature models such as power plants and electric vehicles.

Aerospace and Automotive Industries Highly suitable for insulating components in jet engines, exhaust systems, and high-performance batteries, which often endure extremely high temperatures.

Industrial Furnaces Used as lining material for kilns, furnaces, and heat treatment equipment, protecting structural components from thermal damage.

Renewable Energy Applied in insulation systems for solar thermal power plants and geothermal equipment, capable of withstanding high temperatures generated during energy conversion.

Technical Parameters:

Nominal Value (g/m²)	Average Tolerance (%)	Individual Tolerance (%)	Air Permeability (S/100ml)	Permeation Time (Time)	Water Extract Conductivity (μS/cm)	Mass Loss (%)	Tensile Strength (N/cm)	Dielectric Strength (KV/mm)
50	±3	±5	≤900	≤20	15	0.5	≥3	≥24
60	±3	±5	≤1000	≤25	15	0.5	≥3.2	≥24
70	±3	±5	≤1100	≤30	15	0.5	≥3.3	≥24
100	±3	±5	≤2100	≤55	15	0.5	≥3.9	≥26
120	±3	±5	≤3000	≤65	15	0.5	≥4.0	≥26
160	±3	±5	≤3500	≤90	15	0.5	≥6.0	≥26

Why Choose Calcined Mica Paper?

The calcining process is a key advantage of this material—it eliminates moisture and volatile compounds in uncalcined mica paper that cause degradation, ensuring consistent performance at extreme temperatures. Its thin thickness (typically 0.05-0.2 mm) allows for tight winding in compact spaces, while its compatibility with binders and resins makes it easy to integrate into composite insulation systems. For applications where high temperatures and reliable insulation are paramount, calcined mica paper offers unparalleled durability and efficiency, reducing maintenance costs and extending equipment lifespan.

Synthetic mica paper