Effect of nanoadditive on the microstructure and properties of permanent ferrites;

In order to investigate the effect of rare-earth oxide Pr6O11 on the magnetic performance of the strontium permanent ferrite and the corresponding mechanism,the sample was prepared using both BMS-4 material and Pr6O11 through milling,precipitating,forming and sintering.

The magnetic properties of the permanent ferrite can be strongly improved by a appropriate amount of additives.

In this paper, the reason for agglomeration in rotary-kiln is analyzed in production of pre-sintered permanent magnetic ferrite when the mill scale is used as raw material.

The permanent magnetic ferrite was prepared by the method of solid-phase reaction with the natural magnetite without magnetic separation.

The permanent magnetic ferrite was prepared by the method of solid phase reaction with the natural magnetite without magnetic separation.

Simulation of stress field in the sinter process of magnetic ferrite;

Simulation of temperature field in the sinter process of magnetic ferrite;

The magnetic properties of the slip casting shaped hard ferrite strongly depend on the original slurry granularity.

This paper introduces some basic situations on the development of high performance hard ferrites of TDK and Hitachi Metal of Japan, and reports the new advances on ion substitution and related technology of hard ferrite materials.

Based upon the principles to upgrade the properties of hard ferrite magnet,the manufacturing processes and techniques for high grade hard ferrite are set forth here of concerning raw material mixturation, ball milling, pressing, sintering and other points.

Process schemes such as prefiring,mol ratio,sintering temperature for preparing permanent magnet ferrite from Ruthner Fe2O3 powder was researched.

Use refined iron-sand which has different contents Of TFe and SiO2 to replace Fe2O3 to generate permanent magnet ferrite, and through the observation of the crystal morphology by using electron microscope and the measurement analysis of macroscopic magnetic properties, it is concluded that when the content of TFe≥71.