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Wollastonite

Negotiable MOQ: 1 set (Price negotiable depending on order volume and customization)
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Application:
Ceramics
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U.m.a. Co.
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Application Ceramics

Specifications

Wollastonite, a mineral bestowed with many unique characteristics, is one of the most versatile functional filler and reinforcem

Why Wollastonite? Wollastonite, a mineral bestowedwith many unique characteristics, is one of the most versatilefunctional filler and reinforcement agent. Wollastonite increases theperformance of products like polymers, plastics, paints and coatings,construction materials, friction, ceramic and metallurgicalapplications.

Wollastonite is an industrial mineral comprised of calcium,silicon and oxygen. Molecular formula of wollastonite is CaSiO3 andtheoretically it consists 48.28% CaO and 51.72% SiO2. Naturalwollastonite may contain trace or minor amounts of various metal ionssuch as aluminum, iron, magnesium, potassium and sodium. Wollastoniteis rarely found in pure form and generally contains other minerals likecalcite, garnet and dropsied as gangue minerals or impurities those removed during processing.

Optimum performance van be created by properly matching suitablecoupling agent at the appropriate concentration level to the polymerformulations. Surface modified wollastonite improves  physicalproperties, improved processing & improved dispersion of the resin.

Plastics: In plastics, acicular needle likestructure of  wollastonite improves the durability of the composites.Acicular wollastonite enhances electrical insulating properties,imparts fire resistance & improves dimensional stability. Ultrafine and fine wollastonite improves scratch and impact resistancecompared to other materials. The application of surface treatments likesilanes on the wollastonite substrate changes it from utilitarianfiller to a functional component of a polymer composite. This salinecoating of wollastonite in turn adds performance values which the baseresin does not possess. Overall, the benefits of a surface modified/coated wollastonite are improved physical properties, improvedprocessing along with improved dispersion of the resin.

Construction: Wollastonite has been establishedas a substitute of asbestos in fire-resistant building products used inthe construction. As a functional additive, wollastonite improvesflexural and impact strengths. Wollastonites low thermal conductivityand high aspect ratio structure also makes wollastonite an attractiveaddition where fire resistance is must. Wollastonite is applied ininterior/exterior construction boards, roof tiles, shaped insulationproducts, sheets, panels and sidings.

Paints and Coatings: In coatings, fine acicularwollastonite particles act as flattening agent and allow paint tosettle out after application to produce dry film of uniform thickness.Wollastonites interlocking particles properties improve toughness anddurability of the coating with excellent tint retention, scrub, andweather resistance. High brightness and whiteness of wollastonitereduce pigment load and typically very low oil absorption, reduces thevolume of binder required and contributes to lower pigment input costs.Wollastonite also act as a pH buffer for improved in-can paintstability over long period. The acicular structure and alkaline natureof wollastonite also make it an ideal auxiliary pigment in industrialcoatings and primers for better corrosion resistance.

Metallurgical: In metallurgy wollastonite ishonored due to its low water solubility, low loss on ignition & itsCaSi ratio. Wollastonite is commonly added into formulated powders forsteel casting and welding. CaO/SiO2 ratio of 1 easily absorbs Al2O3that is determining to finished steels. Wollastonite addition tometallurgical fluxes provides ready fusibility, good insulating and lowviscosity properties. As wollastonite is a natural, low temperatureflux wollastonite is accepted in fluxing formulations for thecontinuous casting of steel. Wollastonite formulated casting powder  isapplied when molten steel is poured continuously from a ladle ortundish, to maintain surface defects, prevention of oxidation of steel,lubricates the mold wall and absorbs harmful intrusions.

Ceramics: Wollastonite is used in a line ofceramic applications including ceramic glazes and bodies, enamels,frits, fluxes and in sanitaryware. Wollastonite is a source of CaO toalkaline glaze to improve the strength. Some grades of Wollastonitehas  low LOI (< 1%) which reduces gas evolution during firing andattributes in smooth surface with diminished pin hole problems.Wollastonites acicular structure improves green strength and reducescrazing and checking especially during rapid heating and cooling ofwall and flour tiles. Wollastonite has a low sintering temperature(approximately 991-1196°C), comparable to that of most natural frits.

Friction: Due to its physical structure andnon-hazardous properties, wollastonite is used as a reinforcingadditive in many friction applications. Wollastonite has partially orat some places fully  replaced asbestoses, milled fibers chopped glassand synthetic fibers. Wollastonite is applied in semi-metallic and nonasbestos formulations for brake assemblies for truck blocks, drumlinings, disc pads and friction paper. Due to Wollastonite use infriction applications, physical & mechanical properties areimproved, cracking is eliminated or reduced, pre-form strength &friction stability are improved,  noise levels are reduced and cost ofinput is slashed

Normal Supplies : 200 and 250mesh.

Packing: 50 Kgs.new bags nett.



specifications CHEMICAL ANALYISIS
Si02 : 55.98
Al2O3 : 2.111%
Fe203 : 00.35%
Cao : 31. 42%
Mgo : 4.22%
L.O.I. : 4.40
Na2O : 00.65%
K2O : 00.54%




Min Order 20 mt

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U.m.a. Co.
Business Type
Manufacturer, Trading Company
Year Established
2005
Factory Size
Below 1,000 square meters
Total Employees
11 - 50 People
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