Laboratory crucible is a container used for high-temperature experiments, chemical analysis, material synthesis and other experimental operations. They are usually made of high-temperature and chemical corrosion-resistant materials and can withstand extreme conditions such as high-temperature melting and chemical reactions.
- Main types and materials
Ceramic Crucible
Materials: Alumina, Quartz, Silicon Carbide, etc.
Features: high temperature resistance, good chemical stability, suitable for experiments on molten metal, glass, etc.
Applications: metal smelting, high temperature reaction, material analysis.
Graphite Crucible
Material: High purity graphite.
Features: good thermal conductivity and high temperature resistance, but not suitable for strong oxidizing environment.
Application: Smelting of non-ferrous metals such as copper and aluminum, and high temperature experiments.
Platinum Crucible
Material: Platinum (Pt≥99.95%).
Features: High temperature resistance, excellent chemical stability, suitable for the preparation of high-purity materials.
Application: precision analysis, optical glass melting.
Corundum Crucible
Material: Aluminum oxide (Al₂O₃) .
Features: high hardness, high temperature resistance (melting point about 2050℃).
Application: Melting high temperature alloys and rare earth metals.
Quartz Crucible
Material: High purity quartz (SiO₂ ≥ 99.9 %).
Features: high temperature resistance (below 1450℃), good thermal shock resistance.
Applications: optical glass melting, semiconductor single crystal silicon pulling.
- Application fields
Chemical analysis
Used for melting samples, ashing treatment, etc., such as determining the metal content in the sample.
Material synthesis
Used for high-temperature synthesis of new materials, such as ceramics, intermetallic compounds, etc.
Thermal analysis experiment
For example, differential thermal analysis (DTA) and thermogravimetric analysis (TGA) require measuring changes in sample properties at high temperatures.
Metal smelting
Used for melting nonferrous metals such as copper and aluminum, or for preparing alloys.
- Technical Features
High temperature resistance
It can withstand temperatures above 1000°C, and some materials (such as graphite and platinum) can withstand higher temperatures.
Chemical resistance
It is resistant to corrosion by acids, alkalis and molten metals, and avoids the introduction of impurities.
Thermal stability
The thermal expansion coefficient is small, the thermal shock resistance is good, and cracking is avoided at high temperature.
Mechanical strength
High-strength materials such as alumina can withstand mechanical shock and extend service life.
- Selection Basis
Experimental temperature
High temperature experiments (>1600℃) require the selection of materials such as zirconia and graphite.
Chemical properties
In strong acid and alkali environments, corrosion-resistant materials such as platinum and corundum should be selected.
Purity requirements
High-purity experiments (such as semiconductors) require materials such as quartz and platinum.
Cost Factor
Ceramic crucibles have lower costs, while platinum crucibles have higher costs, so you need to choose according to your budget.
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