High-Purity Rectangular Alumina Saggar – Lab Sample Pack (5 Pcs/Lot)

Engineered for Precision: High-Purity Alumina Lab Saggars (99.2% – 99.4%)

This Lab Sample Pack (5 Pcs/Lot) is specifically configured for university laboratories, material research institutes, and corporate R&D testing. Manufactured directly at our specialized technical ceramic facility, these rectangular alumina saggars deliver uncompromising thermal stability and chemical resistance while completely bypassing local distributor markups.

Factory-Direct Pricing Advantage

Why pay exorbitant local retail prices when you can buy directly from the manufacturer? We guarantee the exact same high-purity slip-cast quality at a fraction of the cost.

CNC Machining & Deep Customization Capabilities

For advanced material synthesis, we do not just supply standard blank saggars. We offer precision CNC deep processing and complex custom geometries tailored for a wide range of industrial and academic research applications.

• Precision Machining: We provide specialized deep processing including micro-hole drilling (down to 0.5mm) and internal threading on crucible bases. After CNC machining, our dimensional tolerances can be controlled to an exceptional ±0.02mm.

• Custom Geometries & Thickness: Beyond standard rectangular saggars, our advanced slip-casting process allows for diverse custom shapes (including curved parts and solid rods). We can accommodate thick-walled plates up to 20-25mm, as well as ultra-thin precision components with 1mm wall thickness for items under 10mm in diameter.

• Application-Specific Design: Whether you need custom side slots for gas venting, specific hole placements for thermocouples, or unique crucible geometries for battery material synthesis, our technical team works directly from your engineering drawings.

The Slip-Casting Advantage: Absolute Zero Water Absorption

Unlike cheap, dry-pressed saggars that harbor microscopic internal voids, our saggars are manufactured using an advanced slip-casting and high-temperature densification process.

• Zero Cross-Contamination: The ultra-dense, 0.00% water absorption surface physically prevents molten metals, reactive fluxes, and chemical slags from penetrating the ceramic wall.

• Superior Lifespan: Eliminates internal structural corrosion and surface “powdering,” ensuring your samples remain pure while significantly extending the saggar’s service life across multiple thermal cycles.

Technical Specifications

• Material Composition: 99.2% – 99.4% High-Purity Alumina (Al2O3)

• Manufacturing Process: Precision Slip Casting

• Max Operating Temperature: 1750°C (3182°F)

• Continuous Working Temperature: 1600°C (2912°F)

• Water Absorption Rate: 0.00% (Fully Densified)

• Chemical Resistance: Highly resistant to aggressive chemical attacks, reducing atmospheres, and most molten metals.

Standard Operating Procedures (SOP) & Usage Guidelines

To maximize the lifespan of your alumina crucibles and prevent catastrophic thermal shock, please strictly adhere to the following laboratory guidelines:

1. Heating & Cooling Rates: Alumina is highly sensitive to rapid temperature changes. Never exceed a ramp rate of 5°C per minute. For optimal longevity, a heating/cooling rate of 2°C to 3°C per minute is strongly recommended.

2. Pre-Conditioning (Bake-Out): Before the first use, heat the empty crucibles to 1050°C at a slow rate to eliminate any residual moisture absorbed during international transit.

3. Placement: Do not place hot saggars directly onto cold surfaces (such as metal lab benches or cold refractory bricks). Always use a ceramic support plate or allow them to cool naturally inside the closed furnace.

4. Maintenance: Thanks to the zero-porosity structure, standard acid washing (e.g., 10% HCl solution) followed by a deionized water rinse is usually sufficient for complete decontamination. For detailed protocols, please refer to our blog post How to Clean Ceramic Crucibles & Saggars Guide.

Important Order Notice for Online Buyers

• Sample Pack Policy: This item is sold strictly as a bundle of 5 identical crucibles to ensure safe international transit and cost-effective shipping for R&D testing.

• Liability: Thermal shock cracking caused by exceeding the maximum recommended heating/cooling rates (5°C/min) is considered user error and is not covered under transit damage warranties.

• Bulk & Ultra-High Purity Procurement: If your laboratory requires customized dimensions, bulk volumes (>50 pieces), or ultra-high purity material (>99.5% Al2O3), please do not order online. Contact our export director directly via the Request a Quote form for optimized factory-direct pricing and technical consulting.