Ferrites

General

Ferrites, which can be classified as soft and hard ferrites, are oxide ceramic materials with the general composition MIIO•Fe2O3, which contain permanent magnetic dipoles. The special magnetic properties are due to the spontaneous parallel or inverse parallel position of the magnetic moments of the atoms in larger areas.

Soft Ferrites

A multitude of magnetically soft materials of the composition MIIO•Fe2O3 is known today, where M = Fe can be Ni, Co, Mn, Mg, Cu, Ti, Cd or Zn. In practice however, two mixed ferrites have proven to be of particular value: manganese-zinc and nickel-zinc ferrites. The addition of zinc-ferrites enables systematic manipulation of the magnetic properties of a material.

Typical applications for soft ferrites:

  • Core material for inductors and transformers in power electronics
  • Ferrite antennae in radio, television, data and telecommunications technology
  • Magnetic audio heads or magnetic amplifiers
  • Ferrite cores for core memory in electronic data processing equipment
  • Switching elements in microwave engineering

Hard Ferrites

Since their introduction in the early 1950s, permanent ceramic ferrite magnets have steadily gained in importance. They are the most economical and most prevalent of all magnetic materials worldwide. Some of the most important hard ferrites are barium ferrite, strontium ferrite and the barium-strontium mixed ferrites.

Typical applications for hard ferrites are found in:

  • Industrial electronics
  • Sensor technology
  • Television and radio technology
  • Loudspeaker magnets
  • Magnetic clamps, adhesive magnets or toy magnets
  • Ring magnets or segment magnets in motors and generators for magnetic clutches
  • Automotive industry, automotive engineering
  • Clock and watch industry
  • Household appliances, refrigerator seals
  • Rotors for direct current motors

Wet Grinding

Products & Solutions in the field of Wet Grinding
The next Generation of Agitator Bead Mills

NETZSCH-Feinmahltechnik GmbH has now developed the new Alpha® modular machine platform. Compared to earlier-generation machines, this series is designed such that different grinding systems can be mounted on the same base platform as appropriate for a defined drive capacity.

Circulation mill system Type Zeta®

The circulation grinding system for all fields of application. Suitability for all viscosities and nearly all products is achieved with different grinding media from 90 µm to 3 mm. This provides highest product qualities and fineness down to the nanometer range.

MiniSeries / MicroSeries - Laboratory Mills for Product Development of Smallest Batches

The compact, universally applicable laboratory circulation mills of the MiniSeries impress with their easy handling when processing very small quantities from 0.25 to 0.5 l up to particle sizes in the nanometer range. It is possible to conduct many tests with low loss of product and significant results within a short period of time.

Finest wet grinding technology – the laboratory mills of the MicroSeries are an investment in the future for new product developments of different fields of application of pigmented ink jets, technical ceramics, cosmetics, pharmaceutical applications and nano-scale high-tech products.

Laboratory agitator bead mill LabStar

The multi-functional laboratory mill LabStar enables scientific academic work even at difficult research and development tasks and convinces by easy handling. The laboratory mill LabStar is the smallest grinding unit of NETZSCH-Feinmahltechnik GmbH that enables an exact scale-up to comparable production machines.


Dry Grinding

Products & Solutions in the field of Dry Grinding
s-Jet® Steam Jet Mill

The s-Jet® System (patent pending) is a new innovation in a line of consistent developments being made in the area of air jet milling. Final finenesses in the submicron range (example: d50 0.2 µm) can now be achieved with fluidized bed jet mills. As opposed to conventional dry grinding processes with fluidized bed jet mills, the s-Jet® System uses superheated steam as its milling gas.

s-Jet® 25 Laboratory-Scale-Steam Jet Mill

The s-Jet® System (patent pending) is a new innovation in a line of consistent developments being made in the area of air jet milling. Final finenesses in the submicron range (example: d50 0.2 µm) can now be achieved with fluidized bed jet mills. As opposed to conventional dry grinding processes with fluidized bed jet mills, the s-Jet® System uses superheated steam as its milling gas.


NETZSCH-Beads®

Products & Solutions in the field of NETZSCH-Beads®
SteelBeads Micro

Hardened steel grinding beads made of roller bearing steel

SteelBeads Q

Food grade chromium steel grinding beads, W 1.3505

SteelBeads HQ

Cast steel grinding beads of tempered carbon steel