Product Description:

Introduction:

natural gas meter magnet  are made of  permanent ferrite magnets , which have a high coercivity and high remanence after magnetization. These are composed of iron oxide and barium or strontium carbonate. The high coercivity means the materials are very resistant to becoming demagnetized, an essential characteristic for a permanent magnet. They also conduct magnetic flux well and have a high magnetic permeability. This enables these so-called ceramic magnets to store stronger magnetic fields than iron itself. They are cheap, and are widely used in household products such as refrigerator magnets. The maximum magnetic field B is about 0.35 tesla and the magnetic field strength H is about 30 to 160 kiloampere turns per meter (400 to 2000 oersteds).The density of ferrite magnets is about 5g/cm3.

Material:

Strontium ferrite, SrFe12O19 (SrO·6Fe2O3), a common material for 

permanent magnet applications.

Barium ferrite, BaFe12O19 (BaO·6Fe2O3), a common material for permanent magnet applications. Barium ferrites are robust ceramics that are generally stable to moisture and corrosion-resistant. They are used in e.g. subwoofer magnets and as a medium for magnetic recording, e.g. on magnetic stripe cards.

Cobalt ferrite, CoFe2O4 (CoO·Fe2O3), used in some media for magnetic recording.

Main features:

1.high working temperature

2.good corrosion resistance

3.high intrinsic coercive force