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Crucibles are essential tools in laboratories for high-temperature applications like melting, burning, and analyzing substances. Selecting the correct crucible ensures accurate results, prevents contamination, and maintains safety during critical experimental procedures. Understanding the various types and their properties is key to making an informed purchase.
The main component is 45% alumina, and the rest is silica.
It is a kind of hard porcelain. It has excellent chemical and thermal shock resistance and high mechanical strength. Widely used in the chemical industry, the pharmaceutical industry and chemical laboratories. For example, enamel, evaporating dish...
It has excellent chemical and thermal shock resistance and high mechanical strength. Widely used in the chemical industry, the pharmaceutical industry and laboratories.
resistant to strong acid and alkali, resistant to rapid cooling and heat, chemical corrosion resistance.
Long-term use temperature: no more than 1150 degrees Celsius.
The main component is 45% alumina, and the rest is silica.
It is a kind of hard porcelain. It has excellent chemical and thermal shock resistance and high mechanical strength. Widely used in the chemical industry, the pharmaceutical industry and chemical laboratories. For example, enamel, evaporating dish...
It has excellent chemical and thermal shock resistance and high mechanical strength. Widely used in the chemical industry, the pharmaceutical industry and laboratories.
resistant to strong acid and alkali, resistant to rapid cooling and heat, chemical corrosion resistance.
Long-term use temperature: no more than 1150 degrees Celsius.
Usage: Suitable for Refining Casting Molding Platinum/Metal /Gold/Silver/Brass/Copper/Alloy etc.
Material:Made of premium ceramic, purity, corrosion resistance, high strength, high heat resistant, high shock resistance.
Widely used: Widely used in electric light, semiconductors, optical communications, military, metallurgy, building materials, chemical, mechanical, electrical, environmental protection and other fields.
Design: Designed with tapered sides and a pour spout for easy material removal.
Package included: 5 X Quartz Silica Melting Crucible(100/150/250/400g/500g) and 2 X tweezers(pointed and curved).
Last update on 2026-09-01 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Lab Crucibles
Material Matters: Choosing the Right Crucible Composition
The material of a crucible significantly impacts its performance and suitability for different applications. Common materials include:
Ceramic (Alumina, Porcelain): Excellent for general-purpose use, resistant to most acids and bases, and can withstand high temperatures up to 1600°C (2912°F). Ideal for ashing, ignitions, and sample preparation.
Graphite: Offers superior thermal conductivity and resistance to thermal shock. It's suitable for melting metals and alloys at very high temperatures, often exceeding 2000°C (3632°F). However, graphite can react with certain metals and is porous.
Platinum: Highly inert and resistant to chemical attack, making it ideal for precise analysis and fusion processes involving aggressive chemicals. It has a high melting point but is significantly more expensive.
Quartz: Provides excellent thermal stability and resistance to thermal shock, with a high melting point. It's often used in semiconductor manufacturing and specialized high-temperature applications.
Size and Shape Considerations
Crucibles come in various sizes, typically ranging from a few milliliters to several hundred milliliters in capacity. The required size depends on the volume of material you need to process. Shapes also vary, with common forms including cylindrical, conical, and shallow dishes. The shape can affect heat distribution and ease of material handling. Ensure the lid, if included, fits snugly to prevent contamination and evaporation.
Frequently Asked Questions
What is the maximum temperature a ceramic crucible can withstand?
Ceramic crucibles, particularly those made from alumina or porcelain, can typically withstand temperatures up to 1600u00b0C (2912u00b0F). This makes them suitable for a wide range of high-temperature laboratory procedures.
Are graphite crucibles suitable for melting precious metals?
Yes, graphite crucibles are excellent for melting precious metals due to their high thermal conductivity and resistance to thermal shock. However, care must be taken as graphite can react with certain molten metals, potentially causing contamination.
When should I consider using a platinum crucible?
Platinum crucibles are recommended for applications requiring extreme chemical inertness and resistance to corrosive substances. They are often used in analytical chemistry for fusions and sample preparations where contamination must be absolutely avoided.
How do I clean a crucible after use?
Cleaning methods depend on the crucible material and the residue. Generally, start with scraping off excess material, followed by washing with appropriate solvents or mild abrasives. For stubborn residues, consult specific cleaning guidelines for the crucible material.
What is thermal shock resistance?
Thermal shock resistance refers to a material's ability to withstand rapid changes in temperature without cracking or breaking. Materials like graphite and quartz generally exhibit good thermal shock resistance, which is crucial for high-temperature applications.
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