Brand: YILONG
Product Name: Rigid Mica Sheet
Form: Sheet, Board
Color: Natural, Gold, or White
Thickness: 0.1-100mm
Size: 1000x600mm, 1000x1200mm, 1000x2000mm, 1000x2400mm
Continuous Working Temperature: Muscovite 500~700℃/ Phlogopite 750~850℃/ Synthetic or Calcined mica ≥1000℃.
Typical Use: Thermal insulation, electrical insulation, sealing, and heat protection
Package: Wood case or pallet. 800-1000KG/pallet(Wood case)
Description
Rigid Mica Sheet, also known as mica plate or mica board, is a high-performance insulation material manufactured from approximately 90% mica paper bonded with 10% high-temperature silicone resin, then heat-pressed into rigid sheets. Available in thicknesses from 0.1 mm to 100 mm, with 0.3–1.5 mm being the most commonly used range, rigid mica sheets are designed for high-temperature and high-voltage applications.
This material offers excellent mechanical strength and electrical insulation, with a typical dielectric strength of 16 kV/mm. Depending on the mica type, muscovite mica sheets withstand 500–700°C, while phlogopite mica sheets resist 750–850°C. Due to their stable performance and reliability, rigid mica sheets are widely used as electrical and thermal insulation components in industrial and household applications.
Features
Excellent thermal resistance
Muscovite mica: 500–700°C
Phlogopite mica: 750–850°C
Synthetic or calcined mica: above 1000°C
Outstanding electrical insulation with breakdown voltage ≥ 16 kV/mm
High mechanical strength and dense structure, free of bubbles and voids
Suitable for various machining methods
Smooth cutting edges and good dimensional stability
Uniform structure, consistent color, and no impurities
Eco-friendly, non-asbestos material
One-time 3D forming available using mold tools
Applications
Rigid mica sheets are widely used as electrical and thermal insulation components in high-temperature and high-voltage environments. Thin sheets are typically punched into gaskets and washers, while thicker sheets are machined into structural insulation parts.
Typical applications include heating elements and insulation components in household appliances, furnaces, motors, transformers, power generation and distribution equipment, and electric or hybrid vehicles. They are also used for insulation cards, barriers, covers, and custom-shaped protective parts requiring excellent thermal, mechanical, and electrical performance.
Mica Sheet Rigid
| Common Properties | Unit | Test Standard | RW 802 | RW 802-L | RW 802-H | RG 802 | RG 802-L | RG 802-H | RW 802-S |
| Density | g/cm³ | IEC60371 | 1.7~2.35 | ||||||
| Water absorption 24h/23℃ | % | GB/T5019 | ≤1 | ≤2 | ≤0.5 | ≤1.5 | ≤2.5 | ≤1 | ≤1 |
| Mica Content | % | IEC60371 | ≥90 | ≥92 | ≥88 | ≥90 | ≥92 | ≥88 | ≥90 |
| Bonding Content | % | IEC60371 | ≤10 | ≤8 | ≤12 | ≤10 | ≤8 | ≤12 | ≤10 |
| Flextural Strength | Mpa | ISO178 | ≥160 | ≥120 | ≥180 | ≥140 | ≥100 | ≥160 | ≥160 |
| Temp resistance continuous | ℃ | IEC60371-2 | 500 | 500 | 500 | 700 | 700 | 700 | 1000 |
| Temp resistance intermittent | ℃ | IEC60371-2 | 800 | 800 | 800 | 1000 | 1000 | 1000 | 1100 |
| Heat Loss as 500℃ | % | IEC60371 | ≤1 | ≤1 | ≤2 | ≤1 | ≤1 | ≤2 | ≤1 |
| Heat Loss as 700℃ | % | IEC60371 | ≤2 | ≤1.5 | ≤3 | ≤2 | ≤1.5 | ≤3 | ≤2 |
| Dielectric Strength | Kv/mm | IEC60243 | ≥20 | ≥18 | ≥20 | ≥20 | ≥18 | ≥20 | ≥20 |
| Volume resistivity | Ω/m | IEC6093 | ≥10^10 | ||||||
| Thermal conductivity | W/m.K | ASTM D5470-17 | 0.23 | ||||||
| Flammability | Class | UL | V-0 | ||||||
| Type | Item | Feature |
| RW802 | Rigid Muscovite Mica Sheet | Rigid, White |
| RG802 | Rigid Phlogopite Mica Sheet | Rigid, Gold |
| RW802-L | Low Smoke Rigid Muscovite Mica Sheet | low bond content |
| RG802-L | Low Smoke Rigid Phlogopite Mica Sheet | low bond content |
| RW802-H | High Bond Content Muscovite Mica Sheet | High bond content, high density, high strength |
| RG802-H | High Content Rigid Phlogopite Mica Sheet | High bond content, high density, high strength |
| RW802-S | Rigid Synthetic Mica Sheet | - |
| R: Rigid W: White G: Gold L: Low smoke and blister-free H: High resin, high strength S: Synthetic | ||
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