mica powder for fire protection application

definition

Mica belongs to aluminum silicate minerals with 

continuous layered tetrahedron structure of silicon oxygen .

Chemical 

composition

SiO2 %

Al2O3 %

K2O %

H2O %

MgO %

muscovite

45.2

38.5

11.8

4.5

phlogopite

38.7~45

10.8~17

7~10.3

0.3~4.5

21.4~29.4

Physical 

properties

transparency

hardness

Coefficient of elasticity 

106Pa

muscovite

71.7~87.5%

2~2.5

1475.9~2092.7

phlogopite

0~25.2%

2.78~2.85

1394.5~1874.05

Products 

specification

1-6mesh, 6-10mesh, 10-20mesh, 20-40mesh, 40-60mesh, 60-80mesh, 

80-100mesh, 150mesh, 200mesh, 325mesh, 400mesh, 600mesh, 

800mesh, 1250mesh or as per client’s request

feature

Stable physical & chemical properties, acid & alkali resistance,  

high temperature resistance, good heat insulation property,

good electric insulation, elasticity and tenacity

application

Widely used in construction, fire protection, welding rod, plastic, electric 

insulation, papermaking, rubber, pearl pigment, well drilling industry etc.  

packing

25kg/bag or as per client’s request

product

Muscotive(silver mica, white mica)

Chemical formular

Kal2(Si3AlO10)(OH.F)2

Chemical composition

SiO2:45.2%, Al2O3:38.5%, K2O:11.8%, 

H2O:4.5%, Na, Ca, Mg, Ti, Cr, Mn, Fe, F:a little

specification

6-10, 10-20, 20-40, 40-60, 60-80, 80-100, 150, 

200, 325, 400, 600, 800mesh or as per client’s 

request

appearance

colorless & transparent, but most of them is 

contaminated with green, brown, yellow or pink 

etc., glassy luster, cleavage surface:pearly luster

transparency

71.7-87.5%

Moh’s hardness

2-2.5

elasticity

(1475.9-2092.7)x106Pa(15050-21340kg/cm2)

exfoliation

About 10

product

phlogopite mica (Golden mica)

Chemical formular

KMg3(AlSi3O10)(F,OH)2

Chemical composition

SiO2:38.7-45%,Al2O3:10.8-17%,K2O:7-10.3%,

MgO:21.4-29.4%, H2O:0.3-4.5%, Na, Ti, 

Mn, Fe, F:a little

specification

6-10, 10-20, 20-40, 40-60, 60-80, 80-100, 150, 200, 325, 

400, 600, 800mesh or as per client’s request

appearance

Yellow, brown, dark brown or black,glassy luster, 

cleavage surface:pearly luster or submetallic 

luster

transparency

0-25%

Moh’s hardness

2.78-2.85

elasticity

(1394.5-1874.05)x106Pa(14220-19110kg/cm2)

exfoliation

5-10