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Crystalline hafnium has the following properties:
1. Physical characteristics:
• Appearance: Crystalline hafnium is a silver-gray metal crystal with a metallic luster.
• Density: The density is relatively large, about 13.31 g/cm ³, which makes it heavier than many common metals for the same volume.
• High melting point: With a melting point of about 2227 ° C, it is a high melting point metal that can maintain a stable crystal structure at high temperatures, so it can be used to manufacture parts that work at high temperatures.
• High boiling point: the boiling point is about 4602℃, and the high boiling point makes it less volatile during high temperature processing, which is conducive to the preparation and processing of materials.
2. Chemical properties:
• Corrosion resistance: It has good corrosion resistance and is not easy to be eroded by general acid-base aqueous solution.However, it is easily soluble in hydrofluoric acid to form fluorine complexes.
• Activity: At high temperatures, hafnium can be directly combined with oxygen, nitrogen and other gases to form oxides and nitrides.However, at normal temperature and pressure, crystalline hafnium is relatively stable in air.
• High neutron absorption cross section: Hafnium has a high thermal neutron capture cross section, which makes crystalline hafnium an important application in the field of nuclear energy and is an indispensable rare material for the development of the atomic energy industry.
3. Crystal structure characteristics: there are two variants of hafnium metal, α-hafnium is a hexagonal close-packed variant (transition temperature is about 1750℃), and there are allotropic variants at high temperatures.
Crystalline hafnium has the following properties:
1. Physical characteristics:
• Appearance: Crystalline hafnium is a silver-gray metal crystal with a metallic luster.
• Density: The density is relatively large, about 13.31 g/cm ³, which makes it heavier than many common metals for the same volume.
• High melting point: With a melting point of about 2227 ° C, it is a high melting point metal that can maintain a stable crystal structure at high temperatures, so it can be used to manufacture parts that work at high temperatures.
• High boiling point: the boiling point is about 4602℃, and the high boiling point makes it less volatile during high temperature processing, which is conducive to the preparation and processing of materials.
2. Chemical properties:
• Corrosion resistance: It has good corrosion resistance and is not easy to be eroded by general acid-base aqueous solution.However, it is easily soluble in hydrofluoric acid to form fluorine complexes.
• Activity: At high temperatures, hafnium can be directly combined with oxygen, nitrogen and other gases to form oxides and nitrides.However, at normal temperature and pressure, crystalline hafnium is relatively stable in air.
• High neutron absorption cross section: Hafnium has a high thermal neutron capture cross section, which makes crystalline hafnium an important application in the field of nuclear energy and is an indispensable rare material for the development of the atomic energy industry.
3. Crystal structure characteristics: there are two variants of hafnium metal, α-hafnium is a hexagonal close-packed variant (transition temperature is about 1750℃), and there are allotropic variants at high temperatures.
