After Rare Earth and Cobalt, why are now Ferrite Magnet costs also increasing?
After Rare Earth and Cobalt, why are now Ferrite
Magnet costs also increasing?
Although the applications of NdFeB magnet
are more and more comprehensive, the market share of Ferrite magnet is
still very large. Ferrite magnets are commonly used in various
applications in the past several decades, such as loudspeakers, motors and
The prices of rare earth products
had experienced a significant change over the past few months,
now Ferrite manufacturers also start to adjust their price. The reason for
the price increase is caused by the raw material cost variation and its
underlying environmental question.
The iron scale and Strontium carbonate are the main
raw materials for Ferrite magnets, their prices are increasing. Also the
prices of Lanthanum oxide and Cobalt oxide are increasing as well.
About iron scale
The surface of steel will be oxidized during heating
and rolling process. We call those fish scale-liked materials as iron
scale. The iron scale can be used as oxidizing agent and the raw material
of iron powder. The iron scale is also one of the major raw materials of
Most of Chinese steel enterprises are located in
Northern China. Now the winter is coming, in order to ensure the air
quality during the heating season, steel enterprises start to slow down their
productions and this will influence the supply of iron scale.
About Strontium carbonate
Strontium carbonate is the raw material for
preparation of other strontium salt and it is applied broadly in
luminescent glass, medical and papermaking.
Most of Chinese mining companies use
reduction-double composition method to manufacture the Strontium carbonate from
Celestine, the waste residue and hydrogen sulfide will be generated in the
leaching process and carbonation reaction respectively. How to properly treat
this harmful substance is an important issue due to the
nationwide environmental storm in China this year.
The influence of Lanthanum and Cobalt on Ferrite
When the Br of Ferrite magnet is higher than 0.41
Tesla, the manufacturer can call it high-performance Ferrite. Japanese
giant TDK firstly introduced Lanthanum and Cobalt to the crystal structure
and developed the high-performance La-Co substituted Ferrite
magnet. The Lanthanum and Cobalt tremendously enhanced the remanence,
intrinsic coercivity and maximum magnetic energy product of Ferrite magnet.
As one of rare earth elements, the price of Lanthanum
also experienced a rapid growth in 2017. It should also be pointed out that the
price of Cobalt element will be continuous increasing due to the supply and
huge demand from the Lithium battery industry (EV).