How to Identify Phlogopite Mica and its use?

As a Phlogopite Mica Manufacturer, share it with everyone.

Phlogopite, one of the muscovite minerals, is an aluminosilicate containing iron, magnesium and potassium. If the iron in the phlogopite composition is not much, it can be used as an electrical insulation material, and therefore has an important role.

Phlogopite Mica

Phlogopite Mica is characterized by its fully cleaved mica, yellow-brown color, and golden-like reflections. The difference between phlogopite powder and muscovite is that it can be decomposed in boiling sulfuric acid and produce a kind of milky solution, while muscovite cannot. Phlogopite has the same general characteristics as muscovite, and phlogopite powder is mainly distinguished from other mica by its brown color and pale golden color. The identification method of biotite similar to color is that its color is lighter than biotite. Tear the two into thin sheets and compare them on white paper. Phlogopite is light yellow-brown, while biotite is gray-green or smoke. The exact identification of colorless or other color phlogopite requires a microscope.

Phlogopite powder is widely used in chemical industry such as building materials industry, fire protection industry, fire extinguishing agent, welding rod, plastic, electrical insulation, papermaking, asphalt paper, rubber, pearlescent pigment, etc. Ultrafine phlogopite powder is used as a functional filler in plastics, coatings, paints, rubbers, etc., which can improve its mechanical strength, enhance toughness, adhesion, anti-aging and corrosion resistance. Industry mainly uses its insulation and heat resistance, as well as acid resistance, alkali resistance, compression resistance and peeling properties. Phlogopite powder is used as insulation materials for electrical equipment and electrical equipment.

Physical properties

Phlogopite is divided into dark phlogopite (brown or green of various shades) and light phlogopite (light yellow of various shades).

Light-colored phlogopite is transparent and glassy; dark-colored phlogopite is translucent. Glass luster to semi-metal luster, cleavage surface is pearl luster.

The sheet is flexible and non-conductive. Colorless or brownish yellow under transmitted light of microscope. Pure mica is an excellent insulating material in the electrical industry and is also widely used in real stone paint coatings. 

Chemical properties

The chemical composition of phlogopite: KMg3 [Si3AlO10] (OH, F) 2, the homogeneous substitution is widely used, so the biotite produced in different rocks has a large gap in chemical composition. Phlogopite has artificial phlogopite (synthetic phlogopite) and natural phlogopite. Natural phlogopite has dark phlogopite and light phlogopite.

Our company also has Plastics Grade Mica on sale, welcome to consult.