Introduction to calcium silicate whiskers
● Calcium silicate whiskers are thin plate-shaped triclinic crystals, and the aggregates are radial or fibrous. The color is white, the luster is glassy, and the cleavage surface is pearly. The Mohs hardness is 4.5~5.5, the density is 2.75~3.10g/cm³, the melting point is 1540℃ and the thermal expansion coefficient is low. Generally, it is resistant to acid, alkali and chemical corrosion; it has low moisture absorption, oiliness, low conductivity and good insulation.
● Calcium silicate whiskers can replace titanium dioxide, zinc titanium dioxide, lithopone, white carbon black, precipitated barium sulfate, asbestos, plant fiber, glass fiber, etc.; they have the properties of reinforcement, flame retardant synergy, etc., and can improve Product performance and cost reduction, etc.
● Based on the fibrous structure with high aspect ratio and stable physical and chemical properties, it can improve the rigidity, wear resistance, tensile strength, bending strength, modulus, hardness, scratch resistance and other mechanical properties of the base material; it can also improve the thermal properties of the base material. Durable properties such as deformation temperature, high temperature resistance, and weather resistance; it can also improve surface properties such as floating fiber exposure and smoothness of the base material.
● Calcium silicate whiskers are widely used in rubber, plastics, silica gel, coatings, ceramics, metallurgy, papermaking and other fields. For example, in the rubber and plastics industry, it can be used in rubber, silicone, fluororubber, PP, PE, PA, PVC, epoxy resin, phenolic resin and other materials.
Calcium silicate whiskers characteristics
● Based on its unique needle-like structure and stable chemical properties, it has outstanding functions such as reinforcement , high temperature resistance, wear resistance, and chemical corrosion resistance;
● Low conductivity and excellent electrical properties;
● High covering power, Low water solubility, low water absorption and low oil absorption value;
● Non-toxic, odorless, non-radioactive, and does not contain the carcinogen asbestos, which is generally banned by the international community;
● Calcium silicate is an ideal white non-metallic functional material.
Basic parameters
Basic physical properties | parameter |
Exterior | White (whiteness 86-92% ) |
Aspect ratio (L:D) | 3:1-20:1 |
molecular weight | 116 |
proportion | 2.9 |
refractive index | 1.63 |
pH value | 9.9 |
Water solubility ( g/100cc ) | 0.0095 |
Moh's hardness | 4.5 |
Coefficient of expansion | 6.5x10 -6 mm/(mm· °C ) |
melting point | 1540 °C |
Thermal Conductivity | 0.1w/m·k |