|Place of Origin:||China|
|Minimum Order Quantity:||10mt|
|Delivery Time:||1 week|
|Payment Terms:||T/T, L/C, Western Union|
|State:||Fine Powder||Hardness:||3 Moh|
|Usage:||Filler And Additive||Purity:||98%|
Calcium carbonate is a chemical compound with the formula CaCO3. It is a common substance found in rocks as the minerals calcite and aragonite (most notably as limestone, which is a type of sedimentary rock consisting mainly of calcite) and is the main component of pearls and the shells of marine organisms, snails, and eggs. Calcium carbonate is the active ingredient in agricultural lime and is created when calcium ions in hard water react with carbonate ions to create limescale. It is medicinally used as a calcium supplement or as an antacid, but excessive consumption can be hazardous.
Calcium carbonate chunks from clamshell
Eggshells, snail shells and most seashells are predominantly calcium carbonate and can be used as industrial sources of that chemical.Oyster shells have enjoyed recent recognition as a source of dietary calcium, but are also a practical industrial source. Dark green vegetables such as broccoli and kale contain dietarily significant amounts of calcium carbonate, however, they are not practical as an industrial source.
Calcium carbonate is one of the earliest and largest fillers used in the rubber industry. Calcium carbonate is filled in rubber in large quantities, which can increase the volume of the product, thereby saving expensive natural rubber and reducing costs. Calcium carbonate can be obtained by filling rubber. Pure rubber sulphide has higher tensile strength, tear strength, and a significant reinforcing effect in natural rubber and synthetic rubber, while adjusting the consistency.
Calcium carbonate plays an important role in the paper industry to ensure the strength, whiteness and low cost of paper. Can in the cable industry
A certain insulation effect.
There is a significant difference in the shape of the PCC and GCC particles. GCC particles are a prismatic structure, which is a common crystalline form of calcite. PCC is an unequal edge prism, sometimes called a rosette structure. Since the fine crystals are fine and long, clustered together, the core particles have a larger specific surface area than the GCC facets, and thus have greater light scattering ability, giving the sheet a higher whiteness and opacity. However, the structure of the rose type also causes a large amount of voids in the particles or between the particles, thereby affecting the bonding between the fibers, so that when the sheet can be filled over a certain threshold, the strength of the sheet is lowered and voids are generated. Reducing the speed of the car becomes a serious problem. This problem can be overcome by mixing PCC and GCC for filling. PCC manufacturers are working hard to develop particles that replicate natural-like prisms to compensate for the limitations of unequal-edge prismatic PCC filling.
In order to achieve good gloss and smoothness, the solid content of the coating is required to be high. As mentioned above, the PCC unequal prismatic particles are aggregated from a rose-shaped core and needle-shaped crystals surrounding it to form a high solid content. The strong dispersion of the coating causes needle-shaped and rose-shaped nucleation, resulting in reduced optical performance and increased amount of adhesive. In general, PCC's application in coatings is not compatible with GCC. PCC dominates the North American coatings market, while GCC is primarily used in coating formulations. Since the filling amount of PCC cannot exceed 15%, the benefit of turning to alkaline papermaking is reduced. Only GCC can operate stably at high loadings (sometimes up to 30%).
|3D model (JSmol)|
|E number||E170 (colours)|
|CompTox Dashboard (EPA)||