hat
Avèk devlope a nan jeni radyo nan ane 1930 yo, moun ki ijan mande pou yo sèvi ak mayetik materyèl ak pèt ki ba nan segondè frekans. Sepandan lanati ferit se move nan izolasyon elektrik, gen anpil peyi (tankou Lafrans, Japon, Almay, Holland elatriye) sekans devlope leman ferit. Espesyalman Fizisyen yo JL biyar la te soti nan Filip laboratwa nan Holland ki devlope estrikti a nan rèldo ki gen zenk mou mayetik ferit ak pèfòmans ekselan. Nan 1952, yo te ferit pèmanan leman ki gen ladan BaFe12O19 devlope. Avèk devlope a nan aplikasyon ferit leman nan endistri ak lavi, teknoloji a fabrikasyon se pi plis ak plis pafè.
eng
With the developing of radio engineering in the 1930s, people urgently require to use magnetic material with low loss of high-frequency. However nature ferrite is bad in electrical insulation, there are many countries (such as France, Japan, Germany, Holland etc.) sequentially developing ferrite magnets. Especially the Physicists J.L. the snooker came from Philip laboratory in Holland who developed the spinal structure containing zinc soft magnetic ferrite with excellent performance. In 1952, ferrite permanent magnet including BaFe12O19 was developed. With the developing of ferrite magnets application in industry and life, the manufacturing technology is more and more perfect.