Crucible Covers

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GISCOM Porcelain Crucible Covers are precision-made lids designed to securely cover laboratory crucibles during heating, ashing, fusion, and sample digestion. They help minimize contamination, control heat distribution, and prevent sample loss caused by splattering or exposure to atmospheric impurities. Engineered for consistent performance, these covers are essential for analytical labs, research institutions, and industrial QC/QA workflows.

Key Features

• High-quality porcelain construction with excellent thermal stability
• Glazed finish (excluding rim) for easy cleaning and enhanced chemical resistance
• Smooth, uniform surface ensures proper fit on matching crucibles
• Resistant to acids, alkalis, and most corrosive chemicals
• Designed for high-temperature applications, including ashing and calcination
• Durable, long-life construction suitable for repeated heating cycles
• Easy-handling knob for secure placement and removal

Material Specifications

• Material: High-grade laboratory porcelain
• Thermal Properties: Withstands temperatures up to approximately 1000–1150°C. Excellent thermal shock resistance when properly heated/cooled
• Chemical Properties: Resistant to acids, salts, and organic The glazed surface minimizes chemical adherence
• Mechanical Properties: High density, smooth finish, chip-resistant
• Standards Compliance: Manufactured according to common international labware guidelines (ISO/DIN for ceramic labware)

Technical Specifications

• Available Sizes: Compatible with GISCOM porcelain crucibles in multiple capacities, as per the table.
• Dimensions: Size-specific diameters designed to match corresponding crucible models
• Rim Design: Unglazed rim for secure, stable placement during heating
• Fit Accuracy: Precision-engineered for optimal sealing and heat retention
• Accessories: Matches GISCOM porcelain crucibles (sold separately)

Handling & Precautions

• Heat gradually; avoid rapid temperature changes to prevent thermal shock
• Use crucible tongs for safe handling
• Clean using mild laboratory detergents; avoid abrasive scrubbing
• Compatible with drying ovens and high-temperature furnaces
• Do not quench from high heat into cold liquids
• Allow to cool naturally before washing
• Inspect regularly for cracks or surface damage

 Applications

• Analytical chemistry labs for ashing, gravimetric analysis, and controlled heating
• Pharmaceutical QC/QA sample preparation
• Chemical and petrochemical industries
• Biotech and academic research laboratories
• Environmental testing labs for residue and solid analysis
• Ensures clean heating, prevents contamination, and improves reproducibility of results

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