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Xinyu South Wollastonite Co. Ltd
Address：Renhe Town, Xinyu City, Jiangxi Province, China
Tell： 0790-6710815
Phone： 13807902693 13979026187
E－mail：xynf@xynf.cn
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SW Series Superfine Acicular Wollastonite Powder
Wollastonite is a typical metamorphic mineral, which has primarily occurred in contact belt between acid rock and limestone, and sometimes occurred in deep metamorphic Calc schist, volcanic product and in some alkaline rock. The chemical molecular formula of Wollastonite is CaSiO3, and structural formula is Ca3 [Si3O9], the theoretical chemical compositions: 48.25% CaO, 51.75% SiO2.
Wollastonite is a thin plate-like crystal of triclinic crystal system whichbelongs to a chain silicate. Its aggregation is radial or fibrous. Its special crystal structure determines its properties, Wollastonite with the advantage of non-toxic, acid and alkali resistant, low hygroscopicity, low oil absorption, low conductivity, good insulation, high whiteness, thermal stability and dimensional stability good, excellent mechanical properties and electrical characteristics. Wollastonite is a natural green, low carbon emission and energy saving industrial mineral.
Product parameters
Particle size analysis
| Component |
SiO2 (%) |
CaO (%) |
Al2O3 (%) |
Fe2O3 (%) |
TiO2 (%)，Max |
MgO (%) |
S (%)，Max |
P (%)，Max |
L.O.I (1050℃) (%) |
PH |
| XYNFW-SW | 48-53 | 43-45 | 0.15-0.30 | 0.15-0.45 | 0.02 | 0.5-1.2 | 0.02 | 0.007 | 1-4 | 9 |
| Specifications | Mesh | D50(μm) | Loose Density(g/ml) | Tapped Density(g/ml) | Sedimentation Value(ml/30g) |
Aspect Ratio (L:D) |
Whiteness(%） |
| XYNFW-SW18 | 600 | 18±1 | 0.35-0.45 | 0.50-0.60 | ≥55 | 10:1-15:1 | 85-92 |
| XYNFW-SW15 | 800 | 15±1 | 0.30-0.45 | 0.45-0.60 | ≥70 | 10:1-15:1 | 85-92 |
| XYNFW-SW13 | 1000 | 13±1 | 0.30-0.45 | 0.40-0.65 | ≥85 | 10:1-15:1 | 85-92 |
| XYNFW-SW10 | 1250 | 10±1 | 0.30-0.40 | 0.45-0.58 | ≥ 120 | 15:1-18:1 | 85-92 |
| XYNFW-SW8 | 1500 | 8±1 | 0.20-0.40 | 0.35-0.60 | ≥125 | 15:1-18:1 | 85-92 |
| XYNFW-SW6.5 | 2000 | 6.5±1 | 0.30-0.35 | 0.30-0.55 | ≥130 | 15:1-18:1 | 85-92 |
| XYNFW-SW5 | 2500 | 5±1 | 0.15-0.35 | 0.30-0.55 | ≥150 | 15:1-18:1 | 85-92 |
Physical Properties of Wollastonite
| Item | Value |
| Particle Size (mesh) | 600-3000 |
| Aspect Ratio（L:D） | 10:1-18:1 |
| Sedimentation Value (ml/200mg) | 55-140 |
| Oil Absorption (g/100g） | 40-50 |
| Whiteness（%） | ＞90 |
| PH | 9.9-10.0 |
| Refractive Index（%） | 1.63 |
| Density (g/cm2) | 2.95 |
| Coefficient of Expansion (mm/mm℃) | 6.5×106 |
| Melting Point (℃) | 1450 |
| Hardness (Mohs) | 4.5-5.0 |
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