MICA

Overview

Final Advanced Materials supplies various types of products comprised of at least 90 % muscovite mica or phlogopite mica (magnesium silico-aluminate). The term “mica” describes a family of minerals which are characterized by a laminar flaked structure. The particular thermal and dielectric properties of these minerals make them suitable for numerous applications, at temperatures up to 1,000 °C. Easy to machine and bond with adhesives, they represent an easy-to-use high-temperature solution.

Manufacturing of Mica

Mica is extracted from natural deposits. Although mica most commonly occurs in the form of fragments or a powder, only laminar mica is of a sufficient quality for the manufacture of effective high-temperature products. Of the numerous varieties of mica, two are employed in high-temperature environments: phlogopite mica, which ranges from brown to green in colour as a result of its magnesium content, and muscovite mica, which contains a higher concentration of aluminium, and is thus whiteish in colour.

General Characteristics of Mica

Health & Safety

• Non-toxic
• Can be stored as a non-hazardous product
  

Thermal Characteristics

• Peak temperature: 1,000 °C
• Good high-temperature resistance
• Low thermal conductivity
• Non-combustible
  

Mechanical Characteristics:

• Pressure-resistant
• Permeable to high-frequency waves

  Chemical Characteristics:

• Water-resistant
• Chemically neutral, halogen-free
• Excellent resistance to acids (excluding sulphuric acid), bases, mineral oils and solvents

Electrical Characteristics

• Electrically insulating
• Resistant to electrical arcing and erosion
• Good dielectric withstand 

Applications of Mica 

• Electrical insulators
• Thermal insulation
• Forging press plates (for the reduction of thermal losses)
• Bottle mould extraction guides
• Sealing of connections in internal gas distribution systems
• Construction of induction furnaces
• Burner, exhaust manifold and heat-exchangers gaskets
  

Mica Products

 Mica Composites MC-5000HT

Mica composites provide an excellent alternative to asbestos-based products for insulation applications. They are also used in the glassmaking, ceramic and metal industries for the insulation of induction or arc furnaces, injection-moulding machines or electrical components in general. They are available in two high-temperature variants: panel and tube. 

 Tape and paper

Tape is comprised of a fine-grade phlogopite mica paper (90 % mica) impregnated with a special high-temperature binder and reinforced by glass fibre applied to one side of the mica. This binder breaks down at high temperatures, without impairing the electrical insulating properties of mica, nor generating any toxic products. This product is non-combustible, due to the presence of glass fibre.

Cotronics Adhesives

Final Advanced Materials, in cooperation with Cotronics, offers high-temperature mica-based adhesives. These technical products are extremely flame resistant and can be used as a highly adaptable sealing compound. We offer two products of the sort: Resbond™ 907R and Resbond™ 907GF.

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