Asayansi Amapeza Magnetic Nanopowder kwa 6G Technology
Newswise - Asayansi azinthu apanga njira yofulumira yopangira epsilon iron oxide ndikuwonetsa lonjezo lake pazida zoyankhulirana za m'badwo wotsatira. Kapangidwe kake ka maginito kumapangitsa kuti ikhale imodzi mwazinthu zomwe zimasiyidwa kwambiri, monga zida zoyankhulirana zomwe zikubwera za 6G komanso kujambula kokhazikika kwa maginito. Ntchitoyi idasindikizidwa mu Journal of Materials Chemistry C, magazini ya Royal Society of Chemistry. Iron oxide (III) ndi imodzi mwazinthu zofala kwambiri padziko lapansi. Amapezeka makamaka ngati mchere wa hematite (kapena alpha iron oxide, α-Fe2O3). Kusintha kwina kokhazikika komanso kofala ndi maghemite (kapena kusintha kwa gamma, γ-Fe2O3). Yoyamba imagwiritsidwa ntchito kwambiri m'makampani ngati pigment yofiyira, ndipo yomalizayo ngati sing'anga yojambulira maginito. Zosintha ziwirizi zimasiyana osati pamapangidwe a crystalline (alpha-iron oxide ili ndi hexagonal syngony ndi gamma-iron oxide ili ndi cubic syngony) komanso maginito. Kuphatikiza pa mitundu iyi ya iron oxide (III), pali zosintha zachilendo monga epsilon-, beta-, zeta-, ngakhale magalasi. Gawo lokongola kwambiri ndi epsilon iron oxide, ε-Fe2O3. Kusintha kumeneku kuli ndi mphamvu yokakamiza kwambiri (kuthekera kwa zinthuzo kukana mphamvu yamagetsi yakunja). Mphamvu zimafika 20 kOe kutentha kwa firiji, zomwe zimafanana ndi magawo a maginito otengera zinthu zamtengo wapatali zapadziko lapansi. Kuphatikiza apo, zinthuzo zimayamwa ma radiation a electromagnetic mu sub-terahertz frequency range (100-300 GHz) kudzera mumphamvu yachilengedwe ya ferromagnetic resonance. muyezo umagwiritsa ntchito megahertz ndipo 5G imagwiritsa ntchito makumi a gigahertz. Pali mapulani ogwiritsira ntchito mtundu wa sub-terahertz ngati njira yogwirira ntchito muukadaulo wopanda zingwe wachisanu ndi chimodzi (6G), womwe ukukonzedwa kuti tiyambitsidwe mwachangu m'miyoyo yathu kuyambira koyambirira kwa 2030s. Zotsatira zake ndizoyenera kupanga mayunitsi otembenuza kapena mabwalo owukira pama frequency awa. Mwachitsanzo, pogwiritsa ntchito ma nanopowder a ε-Fe2O3 azitha kupanga utoto womwe umayamwa mafunde a electromagnetic motero kutchingira zipinda kuzizindikiro zakunja, ndikuteteza ma siginecha kuti asadutse kuchokera kunja. ε-Fe2O3 yokha imatha kugwiritsidwanso ntchito pazida zolandirira za 6G. Epsilon iron oxide ndi mtundu wosowa kwambiri komanso wovuta wa iron oxide kupeza. Masiku ano, amapangidwa mochepa kwambiri, ndipo ndondomekoyi imatenga mwezi umodzi. Izi, ndithudi, zimatsutsa ntchito yake yofala. Olemba kafukufukuyu adapanga njira yopititsira patsogolo kaphatikizidwe ka epsilon iron oxide yomwe imatha kuchepetsa nthawi yophatikizika mpaka tsiku limodzi (ndiko kuti, kuchita kuzungulira kwanthawi zopitilira 30 mwachangu!) . Njirayi ndi yosavuta kubereka, yotsika mtengo ndipo ingagwiritsidwe ntchito mosavuta m'makampani, ndipo zipangizo zomwe zimafunikira kuti kaphatikizidwe - chitsulo ndi silicon - ndi zina mwazinthu zambiri padziko lapansi. "Ngakhale gawo la epsilon-iron oxide linapezedwa mwanjira yoyera kale kwambiri, mu 2004, silinapezebe ntchito zamafakitale chifukwa cha zovuta zake, mwachitsanzo ngati sing'anga yojambulira maginito. Takwanitsa kufewetsa ukadaulo kwambiri," akutero Evgeny Gorbachev, wophunzira wa PhD mu dipatimenti ya Materials Sciences ku Moscow State University komanso mlembi woyamba wa ntchitoyi. Chinsinsi chogwiritsa ntchito bwino zida zomwe zili ndi mawonekedwe osajambulidwa ndikufufuza momwe zilili. Popanda kuphunzira mozama, nkhaniyo ikhoza kuyiwalika mosayenera kwa zaka zambiri, monga zachitika kangapo m’mbiri ya sayansi. Zinali tandem wa zipangizo asayansi pa Moscow State University, amene synthesized pawiri, ndi fizikia ku MIPT, amene anaphunzira mwatsatanetsatane, amene anapangitsa kuti chitukuko bwino.
Nthawi yotumiza: Jun-28-2021