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Description
Mica gasket is made by cutting or rushing mica sheet.The mica sheet is made by heating,suppresssing,combining the 90% mica and 10% glue.
Mica is stratiform mineral,its composed of potassium (K), aluminum (AI),magnesium (Mg),Iron(Fe) and lithium(Li).There are different categories of mica, including white mica, phlogopite, biotite and lepidolite (Lithia mica) . White mica is widely used in industry and national defense because it is elasticity, tenacity and insulativity. it is also acid and alkali resistant, and corrosion proof, which can be stripped, with low coefficient of expansion etc.
Application
Applied to various industries of steel, metallurgy, power generation ,and all kinds of industrial electric furnace,such as power frequency furnace ,refining furnace, intermediate frequency furnace, calcium carbide furnace, ferroalloy, yellow phosphorus furnace, electric arc furnace, power plants, electrolytic aluminum power frequency furnace, intermediate frequency furnace, electric arc furnace and high temperature insulation and various sealing gaskets for electric welding machine, lightning arrester, electric heating element.
Size
|
type |
Rigid muscovite mica gasket |
Rigid phlogopite mica gasket |
|
|
Thickness/ mm |
0.2-100 |
0.2-100 |
|
|
Heat resistant C |
Continual service |
500 |
700 |
|
- |
Intermittent service |
700 |
900 |
|
Dielectric strength kv/mm(≥) |
20 |
20 |
|
|
Heat Loss %(≤) |
500°C |
0.5 |
0.5 |
|
- |
700°C |
0.8 |
0.8 |
When parts thickness < 2mm, punch process size tolerance: +/-0.05mm
When parts thickness > 2mm, process size tolerance: +/-0.1mm
Specification of heat-resistant mica hard sheet
|
Item |
Heat-resistant phlogopite hard sheet |
Heat-resistant white mica hard sheet |
|
|
Mica paper |
Phlogopite |
White mica |
|
|
Binder |
Organic silicon resin |
||
|
Mica content (%) |
≥ 90% |
≥ 90% |
|
|
silicone content(%) |
≤ 10% |
≤ 10% |
|
|
Thickness (mm) |
0.10 ～ 2.0 |
0.10 ～ 2.0 |
|
|
Thickness error (mm) |
Average |
±0.02 － ±0.05 |
±0.02 － ±0.05 |
|
Each point |
±0.05 － ±0.08 |
±0.05 － ±0.08 |
|
|
Density (g/cm 3 ) |
1.6-2.2 |
1.6-2.2 |
|
|
Heat loss (%) |
≤0.60 |
≤1.00 |
|
|
Bending strength (kgf/mm 2 ) |
≥16 |
≥18 |
|
|
Breakdown voltage (KV/mm) |
>18 |
>20 |
|
|
High temperature insulation resistance (M Ω ) |
100 － 600 |
200 － 600 |
|
|
Long-term Working Temperature |
850℃ |
550℃ |
|
|
Standard size (mm) |
1000 × 600, 1000 × 1200 |
1000 × 600,1000 × 1200 |
|
|
Testing standard |
GB5019 － 85, IEC371 |
GB5019 － 85, IEC371 |
|
Specification of heat-resistant mica soft sheet
|
Item |
Heat-resistant phlogopite soft sheet |
Heat-resistant white mica soft sheet |
|
|
Mica paper |
Phlogopite |
White mica |
|
|
Binder |
Organic silicon resin |
Organic silicon resin |
|
|
Mica content (%) |
≥ 90% |
≥ 90% |
|
|
silicone content(%) |
≤ 10% |
≤ 10% |
|
|
Thickness (mm) |
0.10 ～ 2.0 |
0.10 ～ 2.0 |
|
|
Thickness error (mm) |
Average |
±0.02 － ±0.25 |
±0.02 － ±0.25 |
|
Each point |
±0.04 － ±0.06 |
±0.04 － ±0.06 |
|
|
Density (g/cm 3 ) |
1.6-2.2 |
1.6-2.2 |
|
|
Heat loss (%) |
≤2.00 |
≤2.00 |
|
|
Bending strength (kgf/mm 2 ) |
- |
- |
|
|
Breakdown voltage (KV/mm) |
>15 |
>15 |
|
|
High temperature insulation resistance (M Ω ) |
- |
- |
|
|
Long-term Working Temperature |
850℃ |
550℃ |
|
|
Standard size (mm) |
1000 × 600 1000 × 1200 |
1000 × 600 1000 × 1200 |
|
|
Testing standard |
GB5019 － 85, IEC371 |
GB5019 － 85, IEC371 |
|
Feature:
1. High-temperature insulation,arc resistance and corona resistance
2. Stable chemical properties ,acid and alkali resistance
3. Good resistance to high heat and high voltage
4. Excellent mechanical strength