Laboratory 99% alumina ceramic crucible

99% Alumina Ceramic Crucible

Product Overview

A 99% Alumina Crucible is a high-purity ceramic vessel designed for extreme thermal and chemical environments. Manufactured from 99% aluminum oxide (Al₂O₃), these crucibles offer exceptional performance where lower-purity ceramics are inadequate. They are the industry standard for applications demanding maximum temperature resistance, chemical inertness, and material purity.

Key Features & Advantages

· Extreme High-Temperature Resistance: With a maximum service temperature of up to 1750°C (3182°F) and a melting point exceeding 2000°C, these crucibles are ideal for prolonged use in high-temperature furnaces.
· Superior Chemical Inertness: Highly resistant to attack by fluxes, acids, alkalis, and molten metals (except for highly corrosive ones like titanium). This ensures minimal contamination of samples and extends the crucible’s lifespan.
· Excellent Mechanical Strength: Exhibits high mechanical strength and hardness, providing good resistance to mechanical shock and abrasion compared to other ceramic materials like porcelain.
· High Purity & Low Contamination: The 99% alumina composition ensures that the crucible contributes negligible trace elements to the sample, making it essential for analytical chemistry, research and development, and precise melting processes.
· Excellent Thermal Shock Resistance: While not as resistant as lower-density materials, the fine-grained structure of high-purity alumina provides good resistance to thermal shock, allowing for careful heating and cooling cycles.

Typical Applications

· Sample Preparation for XRF/XRD Analysis: Fusing sample powders with fluxes to create homogeneous glass beads for accurate spectroscopic analysis.
· Metal Melting: Melting small quantities of precious metals (gold, silver, platinum), alloys, and other non-reactive metals.
· High-Temperature Ceramic Sintering: Used as setter plates or containers for sintering advanced ceramic powders.
· Laboratory Research: General high-temperature experiments, heat treatment of materials, ash determination, and ignition tests in chemistry and materials science labs.
· Growing Single Crystals: Serving as a container in crystal growth processes from molten materials.

Technical Specifications (Typical)

· Material Composition: 99% Al₂O₃ (Aluminum Oxide)
· Maximum Service Temperature: 1650°C – 1750°C (in air)
· Density: ≥ 3.75 g/cm³
· Hardness: ≥ 85 HRA
· Compressive Strength: ≥ 2000 MPa

Handling & Usage Notes

· Thermal Shock: While resistant, avoid rapid temperature changes (>200°C per hour) to prevent cracking. Preheat gradually when possible.
· Mechanical Shock: Although strong, alumina is a brittle ceramic. Handle with care to avoid chipping or breaking from impacts.
· Cleaning: Usually cleaned by boiling in dilute acid (e.g., hydrochloric acid) or using appropriate cleaning solutions to remove residual sample material.

Conclusion

The 99% Alumina Crucible is an indispensable tool in modern laboratories and industrial settings where precision, purity, and reliability under extreme conditions are paramount. Its unmatched combination of properties makes it the superior choice for the most demanding thermal and chemical processes.

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