Industrial Mineral · Acicular Calcium Silicate
硅灰石 · Calcium Metasilicate (CaSiO₃)
Acicular (needle-like) · Aspect ratio 3:1 to 20:1
Wollastonite is a naturally acicular calcium silicate prized for its needle-like crystal habit, low moisture and oil absorption, high brightness and fluxing behaviour. It reinforces and functionalises ceramics, polymers, friction materials, paints and welding consumables.
Wollastonite is a calcium metasilicate (CaSiO₃) with a distinctive acicular, or needle-like, crystal structure. That natural fibre shape, combined with low moisture and oil absorption, high brightness, alkaline pH and excellent thermal stability, makes it a multifunctional industrial mineral used as both a filler and a reinforcement.
High-aspect-ratio (Y-series) grades act as a functional reinforcement — improving flexural and impact strength in engineering polymers (a partial replacement for glass fibre and asbestos), and giving green strength and dimensional stability in friction materials such as brake pads and clutch linings. Lower-aspect (H-series) milled grades serve as fluxing and brightening additives.
In ceramics, wollastonite lowers firing temperature and shrinkage, reduces moisture expansion and speeds fast-fire cycles for tiles and sanitaryware. In paints it acts as a TiO₂ extender and anti-corrosion pigment, and in welding electrodes/fluxes it provides a stable arc and good slag detachability. Global Vista supplies acicular wollastonite from Chinese and Korean sources across the H-800/H-1250/H-1800 and Y-800 range.
* Values are indicative typical/guaranteed figures and can be tailored to your specification. A Certificate of Analysis (COA) is delivered with every shipment; third-party inspection (SGS / Bureau Veritas / Intertek / CIQ) available on request.
High aspect
Needle-rich reinforcement grade for polymers and friction materials.
Common: polymer / friction
Coarse milled
General filler and flux for ceramics and coatings.
Common: ceramics
Fine
Fine functional filler for paints, plastics and ceramics.
Common: paint / plastics
Ultra-fine
High-performance filler for premium coatings and engineering polymers.
Common: premium coatings
Supplies calcium and silica for a stable arc, good slag formation and clean detachability in welding consumables.
Reinforces brake pads, linings and clutches — provides green strength, thermal stability and is an asbestos-free fibre alternative.
Lowers firing temperature and shrinkage, reduces moisture expansion and enables fast-fire cycles for tiles, sanitaryware and glazes.
Acicular grades improve flexural strength, HDT and dimensional stability in PA, PP and engineering plastics — partial glass-fibre replacement.
Functions as a TiO₂ extender, anti-corrosion pigment and flatting/reinforcing filler with low oil absorption and high brightness.
Calcium-silicate boards, joint compounds and fireproofing where thermal stability and low shrinkage matter.
Lot-traceable chemical and physical analysis with every shipment.
SGS, Bureau Veritas, Intertek or CIQ pre-shipment inspection on request.
Pre-shipment sample for your lab verification before bulk order.
Grade and granulometry tailored to your process, not sold as a generic commodity.
Tianjin Xingang · Qingdao · Shanghai
25kg paper/PP bags (palletized) or 1 MT jumbo bags. Sealed liners for fine grades.
FOB, CIF, CFR, DAP available.
T/T or irrevocable L/C at sight. USD / EUR / JPY settlement.
15–25 days from order confirmation to vessel sailing.
Wollastonite is a multifunctional calcium-silicate mineral used in ceramics (lowers firing temperature/shrinkage), friction materials (brake pads), polymers (reinforcement and glass-fibre/asbestos replacement), paints (TiO₂ extender, anti-corrosion) and welding consumables (flux).
Y-series grades retain a high acicular (needle) aspect ratio for reinforcement in polymers and friction materials. H-series grades are milled to specific finenesses (H-800/1250/1800) for use as functional fillers and fluxes in ceramics, paints and plastics.
Wollastonite is a naturally occurring calcium silicate widely used as an asbestos-free functional fibre in friction and reinforcement applications. We can supply documentation on grade composition for your compliance review.
Its CaO–SiO₂ chemistry acts as a flux that lowers firing temperature and energy use, while the low loss-on-ignition and needle structure reduce shrinkage, warping and moisture expansion — enabling faster firing of tiles and sanitaryware.
From roughly 3:1 for milled filler grades up to 15–20:1 for high-aspect reinforcement grades. Specify your target aspect ratio and fineness and we will match the closest standard grade.
Trial orders from a few MT (one pallet to one container). Production and contract volumes per customer specification, with COA included.
Specify your grade/size, quantity and destination port — we respond within one business day with FOB China and CIF quotes.