Talc / Soapstone
Description
Talc is a naturally occurring mineral, mined from the earth, composed of magnesium, silicon, oxygen, and hydrogen. Chemically, talc is a hydrous magnesium silicate with a chemical formula of Mg3Si4O10(OH)2.
Typical Properties
Heat-resistant: Excellent heat resistance due to its high specific heat capacity and low thermal expansion coefficient. Soapstone can withstand high temperatures without cracking or warping, making it ideal for applications like fireplaces and wood-burning stoves.
Heat-retaining: It also retains heat well, which is why it’s used for cooking tools like soapstone cookware and grilling stones.
Hardness: Very soft (1-2 on the Mohs scale) due to its dominant talc content. Easily scratched with a fingernail.
Carvable: Its softness makes it easy to carve and sculpt, which is why it’s been used for centuries in art and craftwork.
Acid-resistant: Soapstone is naturally resistant to acids and chemicals, making it a good choice for countertops and laboratory equipment.
Low-maintenance: Unlike some other stone surfaces, soapstone doesn’t require sealing or special cleaning.
Density: High density (2.6-3.2 g/cm³), reflecting the packed nature of its platy talc minerals.
Electrical conductivity: Non-conductive due to the insulating properties of talc.
Weathering resistance: Durable and resistant to weathering due to its high density and chemical stability.
Texture: Soapstone typically has a smooth, soapy feel, but its texture can vary from non-foliated to weakly-foliated, depending on the metamorphic process.
Chemical Composition of Calcite
Sio2 : 60-62%
Al2o3 : 0.25-0.28%
Mgo : 30% -33%
Cao : Less Than 1 %
Fe2o3: Less Than 1 %
L.O.I : 4 to 5%
Applications
PP compounds used in automotive and appliances
PS compounds to prepare more stiff MIPS
Additive master batches for paper like LLDPE & HM, HDPE films
Additive master batches for PP & HDPE box strapping
Paints and Rubber Plastics
Paints & Powder Coatings
Paper
Rubber
Ceramics
Printing Ink & Inorganic Pigments
Agro Chemicals
Electrical Insulations
Textile
Dal mill(polishing)