MICA SLIP PLANE
I²r is a supplier of Muscovite Mica Slip Plane for the foundry industry and metal-casters worldwide. Slip plane is designed to separate refractory systems from the coil grout inside a coreless induction melting furnace. The use of Muscovite Mica Slip Plane provides multiple benefits above and beyond the mechanical assistance with liner removal.
- Mica, if installed correctly into the induction furnace, can provide a vapor barrier to slow the progression of harmful gas sublimation that migrates through the refractory system and condenses on the copper turns of the induction coil. Mica has been proven to extend the service life of the coil.
- Mica slip plane facilitates movement of the working refractory system, which helps reduce the effect of coil deformation caused by the expansion and contraction due to thermal cycling of the refractory system within an induction furnace.
- Mica significantly reduces the mechanical strain associated with hydraulic refractory removal systems. The mica prevents binding that naturally occurs between the coil grout and the working refractory lining.
- Mica provides electrical insulation between the coil and molten metal. Mica has great thermal characteristics and prevents excess heat loss within the furnace refractory.
- I²r stocks and distributes Mica by the roll for easy transportation, storage, and installation. Roll dimensions: .015 x 36” x 95’ per roll. (Yoke Insulation, and Slip Plane)
MICA SLIP PLANE
TECHNICAL SPECIFICATIONS view specs
| Muscovite Mica (Yoke Insulation,
and Slip Plane) |
| Properties |
Units |
Specifications |
| Color |
|
Ruby / green / White |
| Density |
gm/cm³ |
2.6-3.2 |
| Specific Heat |
|
0.21 |
| Hardness |
Moh scale |
2.8-3.2 |
| |
Shore Test |
80-105 |
| Breakdown Voltage |
KV/mm |
120 - 200 |
| Coefficient of expansion per °C perpendicular to cleavage plane |
|
9x10⁻⁶− 36 x
10⁻⁶ |
| Thermal conductivity perpendicular to the
cleavage plane |
Gm.cal/sec/cm²/°C/cm |
about 0.0013 |
| |
BTU/hr/ft²/0f/ft |
about 0.31 |
| Water of Constitution % |
|
4.5 |
| Moisture absorbtion |
|
Very low |
| Volume Resistivity |
25°C (77°F) ohm cm |
4 x 10¹³- 2 x 10¹⁷ |
| Acid Reaction |
|
Affected by Hydrofluric acid |
| Insulation resistance |
x 10¹³ ohm/cm |
4 - 20000 |
| Calcining temp |
°C |
700 - 800 |
| Max. operating Temp |
°C |
500 - 600 |
| Optical Axial angle |
degrees |
55 - 75 |
| Tensile Strengths |
MN/m² |
175 |
| Shear Strengths |
MN/m² |
220 - 270 |
| Compression Strengths |
MN/m² |
190 - 285 |
| Modulus of Elasticity |
Kgfcm2 x 10⁻³ /
ibf/in²x
10⁻⁶ |
1400-2100 /
20-30 |
| Loss tangent |
x10⁻⁴ |
.0001 - .0004 |
| Permitivity at 15°C (60°F) |
|
6--7 |
|
|
