MICAVER® is a unique mineral-based, glass-mica compound, insulator developed by Saint-Gobain Advanced Ceramic Composites, combining the molding and machining capabilities of plastics with all the benefits of ceramics. It offers high temperature resistance, non-fragile behavior, and has excellent insulation properties. The primary manufacturing process involves molding, where controlled particle size mica and special glass are mixed and formed into cylindrical pellets at 600-700°C. The proportion of mica and glass varies, resulting in different properties: MICAVER® C, with more mica, excels in electrical and mechanical performance, while MICAVER® T, with more glass, has a greater vitrified surface excelling in damp resistance.
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Mica-glass
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Main properties
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Excellent thermo-dimensional stability
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Great mechanical strength and excellent resistance to impact
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A1 fire behavior
Does not burn and cannot be ignited
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Environmentally inert
Impermeable to oil and gases, stable over time
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Electrically insulating mineral
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High resistivity
Volume and surface
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Very low dielectric losses
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Excellent resistance to acids
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Resistant to radiation
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Characteristics
Technical characteristics Units
Mica C
Mica T
Physical and mechanical Typical Values
Specific gravity 103.kg.m–3
3.2
4.3
Bending strength MPa
100
80
Tensile strength MPa
60
20
Compressive strength MPa
270
260
Hardness Brinell
30
80
Thermal Maximum operating temperature °C
400
350
Softening point °C
500
420
Expansion coefficient 10–6.K–1
11
Thermal conductivity (250 °C) W.m–1.K–1
0.7
Electrical Dielectric strength kV.mm–1
15
11
Resistivity log (10) Ωm
12.7
13.2
Surface resistivity log (10) Ω
15
14.5
Dielectric constant (1 kHz) 9
11
Dissipation factor (1 kHz) 0.017 – 0.04
Arc resistance s
320
Physico-chemical Porosity – absorption of water after immersion for 48 hours mg.cm–2
0.1 – 0.25
N/A
We have 2 processes (compression and transfer) at our disposal to implement Mica-glass material based on the part and application requirements.
