Rigid Mica sheet is an insulating material composed of natural or synthetic mica bonded with organic or inorganic adhesives. It exhibits
excellent high-temperature resistance, dielectric strength, and mechanical durability.
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Features
Based on material and processing, mica
boards are categorized into rigid mica boards and flexible mica boards, extensively used in electrical insulation,
high-temperature equipment, and industrial applications, including motors, generators, furnaces, transformers, and heating
devices.
Technical Data
| Type | Rigid muscovite sheet | Rigid phlogopite sheet | |||
| Normal surface | Smooth surface | Normal surface | Smooth surface | ||
| Mica content | ≥90 | ≥9 | ≥9 | ≥9 | |
| Bond content | ≤10 | ≤10 | ≤10 | ≤10 | |
| Density g/cm3 | 1.7-2.25 | 1.7-2.25 | 1.7-2.25 | 1.7-2.25 | |
| Heat | continuous oC | 500 | 500 | 600 | 600 |
| resistance | Intermittent oC | 700 | 700 | 800 | 800 |
| Heat loss | At 500 oC % | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
| At 700 oC % | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | |
| Flexural strength N/mm2 | ≥160 | ≥160 | ≥160 | ≥160 | |
| Water absorption | ≤1.0 | ≤1.0 | ≤1.5 | ≤1.5 | |
| 24h/23 oC % | |||||
| Dielectric strength Kv/mm | >20 | >20 | >20 | >20 | |
| Volume | 23 oC Ω.cm | >10 17 | >10 17 | >10 17 | >10 17 |
| resistivity | 500oC Ω.cm | >10 12 | >10 12 | >10 12 | >10 12 |
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