Duetto Limited | Home page | Next-generation laminar materials based on mica, aramids, glass and aramid-mica for electrical, electronic and structural applications.

MICA BASED PRODUCTS FOR THERMAL INSULATION AND PROTECTION

Mica-based parts

We can offer a large range of mica-based parts for thermal and insulation protection.

Typical areas of application are external high temperature protection (e.g. in furnaces), formers and lithium battery thermal runaway protection.

Board thicknesses may range from 0.14mm to a centimetre or two.

Our materials may be rigid or flexible, allowing them to conform around curved surfaces.

Parts can be supplied cut to size using CNC or punching. The punching thickness range is 0.1-1.9mm whilst the machining thickness range is 1.5-30mm.

Where customers have requirements for thermal protection, we are able to make calculations using our thermodynamic model in order to determine what the temperature on one face would be were its opposite face to be subjected to any given temperature. In this way we can ascertain what thickness would be required.

Rigid Sheet Products

Our base rigid sheets may be composed of muscovite, phlogopite or synthetic mica.

Thicknesses range from 0.14mm to a centimetre or two.

Whilst thinner sheets also have some flexibility on account of their thickness, they would spring back if flexed.

The choice of which material depends upon the working temperature and flexibility required.

Muscovite mica has the lowest temperature resistance (~600°C) but results in the stiffest sheets.

Phlogopite mica is by nature softer and more flexible and its working temperature is ~850°C.

Synthetic mica is more akin to muscovite mica in stiffness but its working temperature is ~1000°C.

The bonding agent may be either silicone or epoxy resin.

Flexible Sheet and Sheet Composite Products

Our base flexible sheets may be composed of muscovite, phlogopite or synthetic mica.

Our base rigid sheet composites may be composed of muscovite, phlogopite or synthetic mica bonded to a glass scrim.

Their flexibility and softness allows them not only to flex but to conform around a curve and hold their shape.

Thicknesses range from 0.14mm to several millimetres.

The choice of which material depends upon the working temperature and flexibility required.

Muscovite mica has the lowest temperature resistance (~600-650°C) but results in stiffer sheets, though the flexibility of silicone resins can still allow it to be used.

Phlogopite mica is by nature softer and more flexible but its working temperature is ~850°C. Generally this type is preferred for flexible sheets.

Synthetic mica is more akin to muscovite mica in stiffness but its working temperature is ~1000°C, though the flexibility of silicone resins can still allow it to be used.

Silicone resin is used as a bonding agent.

Our sheet composite products may have a glass scrim on one or both sides. As well as protecting the mica, this affords greater protection to the item it is covering. It may also protect against small explosions.

Range of muscovite and phlogopite mica sheet products.

Flexible mica with glass scrim on one side. It easily wraps around a 18650 lithium cell.

Mica flexible sheet with a glass roving to facilitate bonding to another substrate.

Thick thermal insulation sheets for furnaces.

Mica-scrim composite can be tightly wound around an 18650 lithium cell. In practice the entire cell would be covered.