Gudunmawar musamman na alumina foda a cikin kayan maganadisu
Lokacin da kuka kwakkwance babban motar servo mai sauri ko naúrar tuƙi mai ƙarfi akan sabon abin hawa mai ƙarfi, zaku ga cewa madaidaicin kayan maganadisu koyaushe suna kan ainihin. Lokacin da injiniyoyi ke tattaunawa game da tilastawa da ragowar ƙarfin maganadisu, mutane kaɗan ne za su lura cewa farar foda na yau da kullun,alumina foda(Al₂O₃), yana cikin nutsuwa yana taka rawar "jarumi a bayan fage". Ba shi da maganadisu, amma yana iya canza aikin kayan maganadisu; ba shi da aiki, amma yana da tasiri mai zurfi akan ingantaccen juzu'i na halin yanzu. A cikin masana'antar zamani wanda ke bin ka'idodin magnetic na ƙarshe, ana ganin gudummawar musamman na foda alumina da ƙari sosai.
A cikin Masarautar ferrite, shi ne "mayen iyaka hatsi"
Yin tafiya cikin babban taron samar da ferrite mai laushi, iska tana cike da ƙamshi na musamman na sintering mai zafi. Tsohuwar Zhang, ƙwararren ƙwararren masani ne a kan layin samar da kayayyaki, ya ce: "A da, yin manganese-zinc ferrite kamar buhunan daɗaɗɗa ne. A yau, an gabatar da adadin adadin foda na alumina daidai a cikin dabarar, kuma yanayin ya bambanta sosai.
Babban aikin alumina foda a nan ana iya kiransa "injin iyakacin hatsi": an rarraba shi daidai a kan iyakoki tsakanin hatsin ferrite. Ka yi tunanin cewa ƙananan hatsi marasa ƙima suna cikin tsari sosai, kuma mahaɗarsu galibi su ne mahaɗa masu rauni a cikin abubuwan maganadisu da “wuri mafi wahala” na asarar maganadisu. High-tsarki, ultra-lafiya alumina foda (yawanci matakin submicron) an saka shi a cikin waɗannan yankunan iyakar hatsi. Suna kama da ƙananan “dams” marasa ƙima, waɗanda ke hana haɓakar ƙwayar hatsi yadda ya kamata a lokacin zafi mai zafi, suna mai da girman hatsin ƙarami da kuma rarrabawa daidai gwargwado.
A cikin fagen fama na magnetism mai wuya, "structural stabilizer"
Juya hankalin ku zuwa duniyar babban aiki neodymium iron boron (NdFeB) maganadisu na dindindin. Wannan abu, wanda aka fi sani da "sarkin maganadisu", yana da ƙarfin kuzari mai ban mamaki kuma shine tushen wutar lantarki don tuƙi motocin lantarki na zamani, injin injin iska, da ingantattun na'urorin likitanci. Duk da haka, babban ƙalubale yana gaba: NdFeB yana da wuyar samun "demagnetization" a yanayin zafi mai yawa, kuma lokaci mai wadatar neodymium na ciki yana da taushi kuma ba shi da kwanciyar hankali.
A wannan lokacin, adadin adadin alumina foda ya sake bayyana, yana taka muhimmiyar rawa na "mai haɓaka tsarin". A lokacin aikin sintering na NdFeB, an gabatar da ultrafine alumina foda. Ba ya shiga babban lokaci mai girma a cikin adadi mai yawa, amma ana rarraba shi a zaɓen a iyakokin hatsi, musamman ma wuraren da ke da rauni na neodymium.
A sahun gaba na abubuwan maganadisu masu haɗaka, “mai daidaitawa da abubuwa da yawa”
Duniyar kayan maganadisu har yanzu tana ci gaba. Tsarin maganadisu mai haɗaka (kamar Halbach array) wanda ya haɗu da babban jikewar magnetic induction ƙarfi da ƙarancin asara na kayan maganadisu mai laushi (kamar ƙarfe foda na ƙarfe) da babban fa'idodin ƙarfin ƙarfi na kayan maganadisu na dindindin yana jan hankali. A cikin irin wannan ƙirar ƙira, alumina foda ya sami sabon mataki.
Lokacin da ya wajaba don haɗa nau'in magnetic foda na kaddarorin daban-daban (har ma tare da foda masu aiki ba na maganadisu ba) kuma daidai sarrafa rufin da ƙarfin injin na ƙarshe, alumina foda ya zama madaidaicin murfin rufewa ko cika matsakaici tare da kyakkyawan rufin sa, inertness sinadarai da kyakkyawar dacewa tare da kayan iri-iri.
Hasken gaba: mafi dabara da wayo
Aikace-aikace naalumina fodaa fagenkayan maganadisuyayi nisa da ƙarewa. Tare da zurfafa bincike, masana kimiyya sun himmatu don bincika ƙarin tsarin ma'auni na dabara:
Nano-sikelin da daidai doping: Yi amfani da nano-sikelin alumina foda tare da ƙarin uniform size da kuma mafi kyau watsawa, har ma da bincika daidai tsarin tsarinsa na Magnetic yankin bango lining a atomic sikelin.
Alumina foda, wannan oxide na yau da kullun daga ƙasa, ƙarƙashin haskakawar hikimar ɗan adam, yana yin sihiri na zahiri a cikin duniyar maganadisu marar ganuwa. Ba ya haifar da filin maganadisu, amma yana buɗe hanya don daidaitawa da ingantaccen watsa filin maganadisu; ba ya fitar da na'urar kai tsaye, amma yana shigar da ƙarin kuzari mai ƙarfi cikin ainihin kayan maganadisu na na'urar tuƙi. A nan gaba na neman makamashin kore, ingantacciyar wutar lantarki da fahimta mai hankali, gudummawar musamman da ba makawa na alumina foda a cikin kayan magnetic za ta ci gaba da ba da tallafi mai ƙarfi da shiru don haɓaka kimiyya da fasaha. Yana tunatar da mu cewa a cikin babban taron bidi'a na kimiyya da fasaha, mafi mahimmancin bayanin kula sau da yawa suna ɗauke da mafi zurfin ƙarfi - lokacin da kimiyya da fasaha suka hadu, kayan yau da kullun kuma za su haskaka da haske na ban mamaki.