| Vermiculite grade | Vermiculite size | Expansion ratio | Impurity |
| Super fine | 0.3-1mm20-40mesh 40-60mesh | 7-9times | 1.Impurity:5%-10% 2.Moisture:5%max 3.Asbestos:None 4.Origin:Xinjiang,China 5.Sample is free with 1kgs 6.Price is negotiated |
| Fine | 1-2mm 0.7-2mm | 9-10times | |
| Medium | 2-4mm 1.4-4mm | 10-11times | |
| Large | 3-6mm 4-8mm | 8-10times |
Vermiculite after high temperature roasting, the volume can quickly expanded several times to dozens times, after the volume expansion of vermiculite is called expanded vermiculite,
It is layered structure, interlayer containing crystal water, bulk density in 50-200 kg/m3, small thermal conductivity, is a good insulating material. Good quality of expanded vermiculite, the highest temperature can reach 1100 ºC. In addition, expanded vermiculite has good electrical insulation. Expanded vermiculite is widely used in insulation, fire prevention materials, seedlings, flowers, trees, friction materials, sealing materials, electrical insulating materials, coatings, plate, paint, rubber, refractory materials, hard water softener, smelting, construction, shipbuilding, chemical industry, etc
Product specifications: 8-12 mm, 4-8 mm, 2 -- 4 mm, 1 -- 2 mm, 0.3 1 mm, 40 to 60 mesh, 60-80 mesh, 80-100 mesh, 100 mesh, 150 mesh, 200 mesh, 200 mesh, etc
2.White mica chemical formula for KAl2 (AlSi3O10) (OH) 2, with continuous layered silicon oxygen tetrahedron structure, with a very complete cleavage, stripping for flexible sheet, qualitative soft, flexible transparent colorless, thick piece of translucent with a grey, brown, green, rose red, glass to spun silk or pearl luster, hardness is 2.5 ~ 3, the proportion of 2.75 ~ 2.75, the acid resistance.
White mica chemical composition: KAl2 Si3AlO10 (OH, F) 2, the ideal component is octahedron containing Al, can also be a small amount of Fe, Mg, Fe and Mn, Cr, V, etc. The replacement. White mica highly fully at the bottom of the cleavage, color pale white. The characteristics of the thin elastic.
White mica powder is widely used in the industries of building material industry, fire fighting, fire extinguishing agent, welding electrode, plastic, electrical insulating paper, paper making, asphalt, rubber, pearl pigment chemical industry, etc. Ultrafine mica powder for plastic, paint, paint, rubber, such as the functional filler, can improve the mechanical strength, strengthened toughness, anti-aging adhesion and corrosion resistance, etc. In addition to the high electrical insulation, acid and alkali corrosion resistance, flexibility, toughness and sliding resistance, heat insulation, small thermal expansion coefficient, and take the lead in put out of block