Overview
Porcelain white material is a refined ceramic composition primarily consisting of kaolin, feldspar, and quartz. It serves as the foundational material for high-quality porcelain products, distinguished by its bright white color and translucency when fired. The material's quality is determined by its mineral purity, particle fineness, and chemical stability. Historically used in Chinese porcelain production since the Tang Dynasty, modern formulations are optimized for industrial manufacturing. Advanced processing techniques now ensure consistent quality, making it indispensable for premium ceramic goods. The material is supplied as either dry powder or pre-mixed slurry, depending on application requirements.
Physical and Chemical Properties
The material's whiteness index typically exceeds 85% (measured at 457nm wavelength), with low inherent porosity (<0.5%) after firing. Its thermal expansion coefficient ranges between 5.5-6.5×10⁻⁶/°C (20-800°C), ensuring compatibility with glazes. Chemically, it exhibits high resistance to acids and alkalis except hydrofluoric acid. Key performance metrics include plasticity index (15-25 for most formulations), dry bending strength (>2MPa), and firing shrinkage (10-15%). The material's working properties can be adjusted by varying the kaolin-to-feldspar ratio, with higher kaolin content improving plasticity but requiring higher firing temperatures.
Main Applications
In tableware production, porcelain white material creates durable, chip-resistant dinnerware that meets FDA food contact standards. For sanitary ware, its low water absorption (<0.5%) prevents bacterial growth. Premium applications include dental porcelain (requiring <0.3% iron content) and high-voltage electrical insulators. The material is also essential for artistic porcelain, where its ability to maintain intricate details during firing is valued. Industrial uses include laboratory ware, chemical process equipment linings, and specialized architectural tiles. Recent innovations include nano-porcelain compositions for enhanced mechanical strength and thermal shock resistance.
Safety and Storage
While non-hazardous in finished form, the powder requires standard mineral dust precautions during handling. Use NIOSH-approved N95 masks when mixing dry batches, and ensure adequate ventilation in processing areas. Bulk storage silos should incorporate moisture detectors to prevent caking. Fired porcelain products are chemically inert and safe for food contact when properly glazed. Raw material batches should be tested for heavy metal contaminants (lead, cadmium) according to ISO 6486 standards. Shelf life is typically 12 months for powdered form if stored in original moisture-proof packaging below 30°C.
B2B Procurement Guide
Industrial buyers should specify: 1) Whiteness grade (standard/high/super), 2) Firing temperature range, 3) Particle size distribution (D50 typically 5-15μm), and 4) Rheological properties for slurry formulations. Request certified test reports for iron/titanium oxide content and loss on ignition (LOI <5.5%). Quality verification should include trial firings with your specific kiln profile. For large orders, consider on-site audits of the supplier's raw material purification processes. Container loading requires moisture-proof liners for sea shipments. MOQs usually start at 5 metric tons for standard grades, with lead times of 2-4 weeks for customized formulations.
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