Products
Product Details
Product Details
Thick Mica Sheet Series
Thick mica sheet, also called heavy-duty mica sheet, is built on mica paper bonded with a high-temperature resistant silicone resin, then baked and pressed at high temperature. It is characterised by greater thickness, high density and outstanding mechanical strength.
It can be turned, drilled, ground and milled into complex parts to meet demanding industrial requirements.
Processing
Machining and selection
- Precision machining to drawing — turning, drilling, grinding and milling — with finished parts delivered.
- Suited to parts that must combine structural strength, dimensional stability and heat-resistant insulation.
- Non-toxic; an ideal replacement for asbestos.
- Thickness and sheet size are confirmed against the drawing before production.
Properties
What this grade gives you
- Excellent machinability: turning, drilling, grinding and milling, with custom shapes.
- Outstanding heat resistance: continuous service at 500–600 °C, intermittent up to 800–1000 °C.
- High electrical insulation: dielectric strength >20 kV/mm at room temperature, still good at elevated temperature.
- High density, low water absorption: density 2.0–2.35 g/cm³, water absorption <0.5%, a dense and stable structure.
- Environmental and safety: UL94 V-0 rated, non-toxic, an ideal replacement for asbestos.
Specifications
Specifications
Product codes HP5M-H (muscovite), HP5P-H (phlogopite) and HP5S-H (synthetic mica).
| Property | Unit | HP5M-H Muscovite | HP5P-H Phlogopite | HP5S-H Synthetic | Test method |
|---|---|---|---|---|---|
| Mica content | % | ≥88 | ≥88 | ≥88 | GB/T 5019.2 |
| Binder content | % | ≤12 | ≤12 | ≤12 | GB/T 5019.2 |
| Density | g/cm³ | 2.0–2.35 | 2.0–2.35 | 2.0–2.35 | GB/T 5019.2 |
| Temperature resistance, continuous | °C | 500 | 800 | 1000 | GB/T 5019.2 |
| Temperature resistance, intermittent | °C | 800 | 1000 | 1200 | — |
| Weight loss at 500 °C | % | ≤1 | ≤1 | ≤1 | GB/T 5019.2 |
| Weight loss at 700 °C | % | ≤2 | ≤2 | ≤2 | — |
| Water absorption | % | ≤0.5 | ≤0.5 | ≤0.5 | GB/T 1034 |
| Dielectric strength at 20 °C | kV/mm | >20 | >20 | >20 | IEC 60243 |
| after 1 h at 400 °C, measured at 20 °C | kV/mm | 13 | 13 | 13 | — |
| after 1 h at 600 °C, measured at 20 °C | kV/mm | 10 | 10 | 10 | — |
| Volume resistivity | Ω·m | 1.0×10¹⁰ | 1.0×10¹⁰ | 1.0×10¹⁰ | GB/T 31838.2 |
| Thermal conductivity | W/(m·K) | ≤0.3 | ≤0.3 | ≤0.3 | GB/T 29313 |
| Flammability | — | 94V-0 | 94V-0 | 94V-0 | UL |
Special notice: the technical data above are average test results obtained under standard laboratory procedures. Actual performance may vary with application conditions. This datasheet does not constitute a legal guarantee or representation of product fitness; thorough testing before final use is recommended.
Need a sheet size, thickness or drawing-specific part?
Tell us the application, the working temperature and the outline you need, and we will confirm the grade, thickness and machining route.