138_liskun          53F_MICA
LISKUN-Mica is a mineral that offers a wide range of exceptional properties. For about fifty years, COGEBI has been involved in processing mica into industrial material, without changing it’s valuable natural characteristics.
As you read through the available information, you may find that some of the properties of mica could improve your own products. Please do not hesitate to contact us. We can offer a wide selection of materials based on mica, each of them meeting a series of specific requirements and designed for a particular application. We will be able to determine the material best suited to your requirements. If we cannot find one, we will meet with your engineers so that we can develop a new material to meet your needs.
This approach, emphasizing direct contact, has helped us adapt our products to the real world and has allowed us to create the materials of tomorrow, today.

Natural Mica

Natural mica has exceptional physical characteristics. It can be found throughout the world, most notably in the presence of Paleozoic rocks. Accessible deposits are located primarily in India, on the American continent, in southern Africa and in Russia.
Mica’s chemical composition places it in the aluminium silicates group. Two types are extracted – Muscovite, in which there is a predominance of potassium and Phlogopite, in which the presence of magnesium can be detected.
As a mineral, mica has a special characteristic – it can be cleft to obtain very thin flakes of constant thickness.

 

Properties

THERMAL

Mica can withstand temperature in excess of 1000°C/1830°F (Phlogopite), it is flame-retardant, non-flammable, does not give off fumes, and conducts very little heat, especially perpendicular to its strata.

ELECTRICAL

Natural mica has a dielectric strength greater than 25kV/mm (625V/mil), has good resistance to arcing and electrical erosion, and is permeable to microwaves.

HEMICAL

Mica is tolerant of water and most chemical agents, such as solvents, acids, bases and mineral oils.

MECHANICAL

Mica
has good compressive strength. It behaves well in the presence of tensile and bending stresses. It has a high modulus of elasticity.

MAIN TECHNICAL CHARACTERSTICS

Characteristics Test Method MICA HEATER PLATE
Muscovite Phlogopite
Mica Content IEC 371-2 > 90 %
Silicone Content IEC 371-2 < 10 %
Thickness Tolerance, mm Average IEC 371-2 +/- 5%
Individual +/-6%
Standard Size (mm) IEC 371-2 1000 x 1000, 1000 x 1200,
1000 x 2400
Density (gm/cm3) IEC 371-2 2,0~2.20 2,0~2.20
Flexural strength (N/mm2) ISO 178 ≥200 ≥210
Dielectric strength (KV/mm) at 23°C IEC 243 >20 >25
Insulation resistance (M-ohm) at 23°C IEC 93 200 ~ 600 100 ~ 600
Resistance to temperature continuous 1000ºC 1100ºC
Peak 1100ºC 1200ºC
Weight Loss @ 550°C for 4 Hrs IEC371-2 <1%
Water Absorption after 24 hrs ISO 62 <0,5%

Mica Paper Tube

 

Product Description

Mica paper tube is a hard pipe insulating material prepared by using mica paper with silicon binder

Application

electric motor, electric appliances and resistors.

Available:

with wrapped on SS threaded rods

MAIN TECHNICAL CHARACTERSTICS

Characteristics Muscovite
Mica
Phlogopite
Mica
Binder Silicone
Thickness Tolerance OD +/- 0.20 mm
ID +/- 0.10 mm
Standard Length 1 Meter
Density (gm/cm3) 1.8
Wall Thickness Min. 0.5 mm
Max. 13 mm
Electric Strength Parallel to laminate (In oil at 90°C)
22 KV/mm Min.
26 KV/mm Avg.
Electric strength Normal to laminate (In oil at 90°C)
10 MV/m Min.
12 KV/m Avg.
Insulation resistance After 24 hours in water 1 mega-ohm Min.
Temperature classification 500°C ~ 550°C 650°C ~ 700°C
Water Absorption 1.6 mg/cm2 Avg
2.0 mg/cm2 Max