Lub hauv paus chiv keeb thiab kev thov ntawm Bonded Permanent Magnets

Lub advent ntawmBonded Neodymium hlau nplaumtuaj yeem taug qab mus rau xyoo 1934. Nws yog compounded los ntawm German Max Berman Company siv Alnico magnetic hmoov thiab phenolic resin. Lub tuam txhab tsim anisotropically bonded mus tas li hlau nplaum nyob rau hauv 1957 los ntawm kev txhaj tshuaj molding ntawm barium ferrite magnetic hmoov thiab yas resin. Xyoo 1962, Ryan Company tau sib xyaw barium ferrite sib nqus hmoov nrog roj hmab los tsim cov hlau nplaum ruaj khov, thiab tau thov rau patent. Xyoo 1960, Japanese roj hmab ua cov nroj tsuag feem ntau siv cov khoom pov tseg los ntawm kev tsim cov hlau nplaum ruaj khov ferrite los ua cov hlau nplaum ruaj khov. Xyoo 1970s, qee lub tuam txhab pib tsim thiab tsim cov ferrite hmoov tshwj xeeb rau cov hlau nplaum ruaj khov; yas-bonded ruaj khov hlau nplaum ferrites siv yas raws li ib tug binder tau industrialized, thiab (BH) max tus nqi mus txog 15MGOe. Txij thaum ntawd los, daim ntawv thov kev lag luam ntawm cov hlau nplaum ruaj khov tau txuas ntxiv nthuav dav, cov khoom lag luam ntawm cov khoom sib txuas barium- thiab strontium-permanent ferrite tau nthuav dav sai, thiab cov khoom lag luam tau zoo tuaj.

Nyob ib ncig ntawm 1967, Dayton University hauv Tebchaws Meskas, Philip Research Institute hauv Netherlands, thiab Goldschmidt AG hauv Tebchaws Yelemees pib tsim SmCo5-raws li cov hlau nplaum ruaj khov. Nyiv pib kawm txog lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov nyob rau thaum ntxov 1970s, thiab nyob ib ncig ntawm 1975, SmCo5 bonded hlau nplaum tau raug tsim tawm. Thaum kawg ntawm xyoo 1970, Tebchaws Asmeskas, Tebchaws Askiv, Nyij Pooj, Switzerland thiab lwm lub tebchaws tau qhia txog cov khoom lag luam no. Yuav luag txhua tus ntawm lawv siv SmCo5 sib nqus hmoov thiab epoxy resin binder thiab tau ua los ntawm cov txheej txheem compression molding.  Xyoo 1979, T. Shimoda thiab lwm tus los ntawm Nyiv lub Suwa Seiko Co., Ltd. tau tshaj tawm ntawm International Symposium on Rare Earth-Cobalt Permanent Magnets thiab Lawv Daim Ntawv Thov uas muaj cov khoom siv hluav taws xob sib nqus siab Sm-Co system tau siv Sm2TM17 magnetic hmoov thiab resin binder. Bonded hlau nplaum, txoj kev vam meej ntawm no high-performance bonded hlau nplaum nyob rau hauv tas li ntawd, tau attracted zoo mloog los ntawm kev lag luam thiab cov neeg siv. Los ntawm thaum ntxov 1980s, ntau lub teb chaws tsim tau tsim cov khoom lag luam zoo. Qhov (BH) max ntawm compression molded khoom feem ntau mus txog 15MGOe, thiab cov khoom txhaj tshuaj molded mus txog 9MGOe. Lub sijhawm xyoo 1979 txog 1987 yog thawj lub sijhawm kev loj hlob ntawm lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov, uas tau siv dav hauv cov motors me, CD optical pickups, me buzzers, teb encoders, twj paj nruag, magnetic sensors, optical isolators thiab lwm yam khoom.