GFI1

Designation

Name	The value
Designation GOST Cyrillic	ГФИ1
Designation GOST Latin	GFI1
Transliteration	GFI1
By chemical elements	GePIr1

Description

GFI1 is used: for the manufacture of crystalline rods (Yudenich), used for technical and research purposes (pipes, wire, sheet, foil, special techniques, electronic ceramics, special refractories, thermocouple covers, alloys, etc.); details of the electrical and electronic industry (electronic ceramics, certain types of electrolytic capacitors, filaments of light bulbs, electrodes of rectifiers, cathodes, gas discharge tubes, high-pressure x-ray and television tubes, contacts, resistors, dielectric coatings, etc.); products working in contact with aqueous coolant without the protective shell and other parts of nuclear power and absorbing elements (PEL) energy and transport reactors.

Note

Hafnium high purity, free from gas impurities get iodidum way.
Hafnium has ultra-high corrosion resistance (higher than that of zirconium). It has a high resistance to action of aggressive media (hot water, steam, liquid sodium, alkali, dilute hydrochloric acid, nitric acid, any concentration of organic liquids). Hafnium has a high (Zirconia) level of thermal and radiation resistance.

Standards

Name	Code	Standards
Non-ferrous metals, including rare, and their alloys	В51	GOST 22517-77

Chemical composition

Standard	C	Mn	Cr	Si	Ni	Fe	N	Al	Ti	Mo	Ca	Zr	Mg
GOST 22517-77	≤0.01	≤0.0005	≤0.003	≤0.005	≤0.05	≤0.04	≤0.005	≤0.005	≤0.005	≤0.1	≤0.01	≤1	≤0.004

According to GOST 22517-77, the total mass fraction of hafnium and zirconium should be ≥ 99.80%. Mass fraction of molybdenum in hafnium - due to the mass of molybdenum wire, embedded in the technological process of obtaining hafnium.

Physical characteristics

Temperature	r, kg/m³	a, 10^-6 1/°C
20	13200	59

A description of the physical symbols

Name	Description
r	Density
a	The coefficient of linear expansion