Mica-Silicone Composite
Overview: Mica-Silicone Composite
Final Advanced Materials processes mica in various forms. It can be employed in the form of a textile, for flexible solutions, but also in the form of a solid sheet material. Regardless of the product selected, the properties of mica make it an ideal candidate for thermal insulation applications.
MC-5000HT mica is composed of 90% phlogopite mica and 10% silicone binder. Mica panels can be used as a replacement for products containing asbestos. The continuous service temperature is 1,000°C.
Important: it is necessary for MC5000-HT to be compressed between two plates or flanges. Mechanical compression prevents any crumbling of the product in response to the action of temperature, given that the silicone binder deteriorates at temperatures in excess of 300 °C, and replacement of the component will therefore be necessary after dismantling.
Mica composite materials are mainly used in the following areas:
- In the glass industry, the thermal properties and abrasion resistance of MC-5000 are advantageous.
- In the gass distribution sector, its pressure resistance and high-temperature resistance permit the prevention of gas leaks, even during a fire.
- In the induction furnace construction sector, MC-5000 is employed for its thermal and electrical insulating properties, and for its permeability to high-frequency waves.
- Reduction of heat losses between the plates of forging presses, on the grounds of its resistance to pressure at high temperatures
Applications of Mica-Silicone Composite
- Guide for bottles released from a mould
- High-voltage applications
- Sealing of internal network connections
- Construction of induction furnaces
- Forging presses
Main Characteristics of Mica-Silicone Composite
- Low thermal conductivity
- Good resistance to high temperatures
- A good electrical insulator
- Easy to machine and glue
- Non-toxic
- High mechanical strength
- High compressive strength at high temperature
- Excellent resistance to flame
- Good electrical arcing resistance and erosion resistance
Dimensions of Mica-Silicone Composite
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Type |
MC5000-HT |
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Dimensions |
Board |
For every thickness: 1,220 x 1,020 mm and 1,200 x 1,000 mm |
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Tolerances |
±0.7 % thickness 2 mm |
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Customed designs are available on request. |
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Other products available
Depending upon requirements, it is also possible for this composite mica material to be procured in other forms (subject to the confirmation of a minimum order quantity and lead time):
- MC-5000 mica tubing (with similar characteristics to panels) up to a diameter of 300 mm and a length of 1,100 mm.
- Mica paper impregnated with a silicone resin, laminated on a woven glass-fibre base in order to provide temperature resistance, flame resistance and electrical insulation. This product is essentially used for the production of cables which are fire-resistant at temperatures of 1,000°C.
Minimum order required.
Technical Data of Mica-Silicone Composite
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Property |
Unit |
MC-5000HT |
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Item N° |
080-0011 |
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Composition |
90 % phlogopite mica |
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Density |
kg/m3 |
2,200 |
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Thermal Properties |
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Max. Operating Temperature |
°C |
700 |
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Max. Peak Temperature |
°C |
1,000 |
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Weight Loss |
V-0 (UL 94) |
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Thermal Conductivity ⊥ to the board |
at 23 °C |
W.m-1.K-1 |
0.30 |
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at 100 °C |
0.31 |
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at 200 °C |
0.32 |
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at 300 °C |
0.345 |
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Mechanical Propertieses |
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Compressive Strength ⊥ to the board ISO 604 |
at 20 °C |
kJ/m2 |
300 |
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at 200 °C |
MPa |
240 |
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Flexural Strength IEC 371-2 |
MPa |
120 |
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Tensile Strength ISO 527 |
MPa |
110 |
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Electrical Properties |
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Dielectric Strength IEC 371-2 |
kV/mm |
25 |
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Chemical Properties |
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Water Absorption IEC 371-2 |
% |
< 0.5 |
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Resistance to chemicals |
Excellent |
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Thermal Expansion Coefficient |
10-6 K-1 |
10 |
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Physical variables included in this documentation are provided by way of indication only and do not, under any circumstances, constitute a contractual undertaking. Please contact our technical service if you require any additional information.
FAQs that can help you in this category
Les plaques en silicate de calcium présentent une faible densité (200 – 1 000 kg/m³), une conductivité thermique faible (~0,05–0,35 W/m·K) et une bonne tenue jusqu’à 1 000 °C. Elles sont utilisées comme isolants structurels. Les plaques en mica (phlogopite ou muscovite) offrent une excellente rigidité diélectrique (> 20 kV/mm) et une tenue thermique jusqu’à 500–1 000 °C selon le type. Merci de consulter Final Advanced Materials pour l’usage du composite Mica, ce produit est très particulier. Il doit être en permanence comprimé entre 2 autres plaques pour conserver son intégrité mécanique (dégradation du liant silicone à haute température).
Oui, les composites inorganiques proposés par Final Advanced Materials peuvent être usinés en CNC. L’usinage des réfractaires à base de silicate de calcium (CaSiO₃) ou matériaux dérivés type boards isolant présente des spécificités liées à leur faible densité, forte porosité et faible cohésion mécanique. Ces composites ne sont pas durs mais il y a un risque élevé d’écaillage et effritement, il faut minimiser les efforts et éviter l’arrachement de matière. La poudre générée est très abrasive, un système d’aspiration sur votre installation est indispensable. Nous pouvons usiner ces matières pour vous dans notre atelier.
Pour une application continue à 1 000 °C, Final Advanced Materials recommande des composites à base de fibres céramiques ou silicate de calcium. Ces matériaux offrent une conductivité thermique faible (~0,08–0,35 W/m·K) et une bonne stabilité dimensionnelle. Les composites nanoporeux peuvent descendre à 0,02–0,04 W/m·K mais sont plus fragiles mécaniquement. Le choix dépend du compromis entre isolation thermique et résistance mécanique. Un descriptif complet de l’application et des contraintes est nécessaire pour faire une prescription de matière.
Les panneaux composites haute température de Final Advanced Materials présentent des résistances en compression variant de 1 à 40 MPa selon la densité. Les matériaux isolants légers (fibres, microporeux) sont limités (~1–5 MPa), tandis que les composites plus denses (silicate renforcé, zircone) atteignent 10–20 MPa, jusqu’à 40 MPa pour un silicate de calcium de densité 1300 kg/m3. Attention tous les composites inorganiques qui tiennent à hautes température (>300°C) n’ont aucune élasticité et sont donc assez fragiles.