Description

Pyrophyllite is a naturally occurring hydrous aluminum silicate mineral valued for its unique combination of thermal stability, chemical inertness, and low thermal expansion. This makes it a critical functional filler and raw material in numerous high-temperature and refractory applications. Industries such as ceramics, refractories, paints, and plastics rely on its consistent performance to enhance product durability and thermal properties.

Application

• Refractory Products: A key component in the manufacture of firebricks, castables, and insulating materials due to its high melting point and volume stability at elevated temperatures.
• Ceramics & Porcelain: Used as a filler in ceramic bodies and glazes to reduce shrinkage, improve thermal shock resistance, and control thermal expansion.
• Paints & Coatings: Acts as an extender pigment to improve durability, weather resistance, and sheen control in both interior and exterior formulations.
• Plastics & Rubber: Serves as a functional filler to enhance dimensional stability, heat resistance, and electrical insulation properties in compounded materials.
• Foundry Molding Sands: Employed as a bonding agent in foundry sands to create stable molds and cores for metal casting.
• Insecticide Carriers: Utilized as an inert, absorbent carrier material for powdered agricultural chemicals and pesticides.
• Construction Materials: Incorporated into joint compounds, sealants, and roofing materials to improve fire resistance and filler performance.

Basic Information

Product Name	Pyrophyllite
CAS No.	141040-73-5
Molecular Formula	Al2Si4O10(OH)2
Molecular Weight	360.31 g/mol
Synonyms	Pyrauxite; Agalmatolite; Pagodite; Wonderstone; Pyrophyllite Clay; Hydrated Aluminum Silicate; Aluminum Silicate Hydroxide
EINECS	Contact for details

Quality Control

Our Pyrophyllite is sourced and processed under strict quality protocols to ensure batch-to-batch consistency for industrial applications. Quality is verified through a series of tests including chemical composition analysis, particle size distribution, and loss on ignition. While we offer standard industrial and ceramic grades, Certificates of Analysis (COA) are available upon request to meet your specific procurement and quality assurance requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong acids and strong oxidizing agents. As a fine mineral powder, protect from moisture to prevent caking.

Specification

Item	Specification
Appearance	White to off-white fine powder
Identification (XRD)	Conforms to Pyrophyllite
Assay (as Al2O3 + SiO2)	≥ 85.0 %
Loss on Ignition (LOI)	4.0 - 7.0 %
Particle Size (D50)	10 - 45 µm (customizable)
Moisture Content	≤ 1.5 %
pH (10% slurry)	6.0 - 8.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.