Characteristics of pyrolytic boron nitride crucible and pyrolytic graphite crucible

Pyrolytic boron nitride crucible:

Preparation process:
Boron and nitrogen-containing gas compounds are deposited on the heated mold core under vacuum conditions.
After obtaining the pre-coating, keep the temperature constant.
Continue the chemical vapor deposition reaction to obtain a pyrolytic boron nitride crucible.
Remove the pre-coating and make a crucible.
Main features:
Excellent chemical and thermal stability, does not react with most molten metals and semiconductors.
High density, no pores.
Reusable and easy to clean.
Anisotropic, microwave and infrared transparent.
Good high-temperature insulation performance.
Application: Commonly used in semiconductor processes, smelting metals and semiconductors, with an operating temperature of up to 1800 degrees, and up to 2100°C under atmosphere protection. It is commonly used for evaporation, molecular beam epitaxy, gallium arsenide single crystal preparation, etc.

Pyrolytic graphite crucible:

Preparation process: Under high temperature, low pressure, and nitrogen atmosphere, hydrocarbons are cracked, carbon atoms are deposited on the model, and then cooled and made.
Main features:
High temperature resistance, low ablation rate.
Resistant to acid and alkali chemical corrosion at high temperature.
Smooth and dense surface, low permeability, easy to clean.
Has certain mechanical strength.
High purity, no contamination of samples, reusable.
Application: Used for pretreatment of samples in minerals, building materials, glass, etc., and can also be used for preparation of high-purity metal oxides, ion plating, etc.

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