A polished crucible is a crucible that has been surface polished and is mainly used in high-temperature experiments or industrial production where high material purity is required.
Definition and characteristics
Polishing: The inner wall of the crucible is treated by mechanical or chemical methods to reduce its surface roughness and achieve a mirror or sub-mirror effect.
High purity requirements: Polishing can reduce residual impurities and avoid contamination caused by crucible surface defects during the experiment. It is suitable for experiments with extremely high requirements for material purity, such as semiconductor material preparation, high-purity metal smelting, etc.
High temperature resistance: Polishing crucibles are usually made of high melting point materials (such as quartz, alumina, graphite, etc.) and can withstand high temperature environments without deformation or chemical reactions.
Application Areas
Laboratory research: In experiments such as chemical analysis and material synthesis, polished crucibles can be used for high-temperature melting, crystal growth and other processes to ensure the accuracy of experimental results.
Industrial production: In metallurgy, ceramics, electronics and other industries, polished crucibles can be used for smelting and processing of high-purity materials, such as sapphire crystal growth, rare earth metal purification, etc.
Common materials
Quartz crucible: It has the characteristics of high purity, high temperature resistance, good chemical stability, etc., and is suitable for the preparation of semiconductor materials.
Alumina crucible: high temperature and corrosion resistant, suitable for high temperature chemical reactions and material smelting.
Graphite crucible: good thermal conductivity, high temperature resistance, suitable for metal smelting and carbide synthesis.
Polishing process
Mechanical polishing: Use sandpaper, polishing cloth and other tools to polish the crucible surface and gradually reduce the surface roughness.
Chemical polishing: The crucible surface is corroded by chemical reagents to remove microscopic defects and obtain a smooth surface.
Ultra-precision polishing: Combining mechanical and chemical methods to achieve nano-scale surface roughness, suitable for scenarios with ultra-high purity requirements.
Advantages
Reduce impurity contamination: Polishing the surface can reduce impurity adsorption and improve material purity.
Improve experimental accuracy: Smooth surface is conducive to uniform heat transfer, reducing local overheating or uneven reaction.
Prolong service life: Polishing can enhance the corrosion resistance and wear resistance of the crucible and prolong its service life.
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