AGGREGATE OF PARTICLES OF MAGNESIA Russian patent published in 2005 - IPC

FIELD: aggregate of particles of magnesia.

SUBSTANCE: the invention presents an aggregate of particles of magnesia, that has a controlled structure of particles and may be used in the capacity of covers for annealing forming a forsterite film. The aggregate of particles of magnesia has a diameter of pores corresponding to the first inflection point on the curve of a total volume of pores of the aggregate, makes no more than 0.3^.10^-6.m. Volume of inter-particle pores is from 1.40^.10-3 up to 2.20^.10-3 m3 / kg. The volume of pores inside the particles is from 0.55^.10-3 up to 0.80-10^.10-3 m3 /kg. There is a description of a cover for annealing of a sheet made out of the anisotropic electrical steel, that contains the aggregate of particles of magnesia and an annealed sheet. The technical result is an increase of insulating and magnetic properties of anisotropic electrical steel.

EFFECT: the invention ensures an increase of insulating and magnetic properties of anisotropic electrical steel.

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