1. Essential Chemistry ndi Structural Characters
1.1 Crystalline vs. Amorphous Boron: Kukonzekera kwa Atomiki ndi Kuyera
(Boron Powder)
Boroni, mbali 5 pa tebulo la zinthu, amapezeka mumitundu yambiri ya allotropic, ndi ufa wa crystalline ndi amorphous kukhala woyenera kwambiri m'mafakitale.
Crystalline boron nthawi zambiri imatenga mawonekedwe a rhombohedral (α-rhombohedral) yopangidwa ndi B ₁₂ icosahedra yolumikizidwa mu netiweki yovuta ya mbali zitatu, kusonyeza kulimba kwakukulu, chitetezo chamafuta, ndi zochita za semiconductor.
Motsutsana, boroni ya amorphous ilibe dongosolo la atomiki lalitali, okhala ndi masango osokonezeka a ma atomu a boron omwe amabweretsa kukhudzidwa kwamphamvu kwamankhwala chifukwa cha zomangira zomangika komanso zovuta zamamangidwe..
Amorphous boron nthawi zambiri imapangidwa ndi kuchepa kwa mankhwala a boron halides kapena kuwola kwamafuta a boron hydrides., kutulutsa ufa wabwino wokhala ndi tinthu tating'ono kuyambira ma nanometer mpaka ma micrometer.
Boron yoyera kwambiri ya amorphous (> 95% B) ndizofunikira pakugwiritsa ntchito kwatsopano, monga kuipitsidwa monga mpweya, kaboni, ndi zitsulo zitha kusintha kwambiri kuyaka kinetics, nyumba zamagetsi, ndi ntchito catalytic.
Maonekedwe a metastable a amorphous boron amachititsa kuti ikhale yonyezimira pa kutentha kwakukulu (chatha 800 °C), zomwe zitha kuthandizidwa kapena kuchepetsedwa kutengera zomwe zakonzedwa.
1.2 Zakuthupi ndi Zamagetsi
Boron ufa, makamaka mu mawonekedwe aamorphous, amawonetsa malo okhalamo apadera kapena malonda omwe amachokera ku kuperewera kwawo kwa ma elekitironi komanso kulumikizana kwapakati.
Ali ndi chinthu chosungunuka kwambiri (kuzungulira 2076 ° C kwa boron wa crystalline) ndi kulimba kwapadera (chachiwiri ndi ruby ndi kiyubiki boron nitride), kuwapanga kukhala abwino kwa zomangira zosamva kuvala ndi ma abrasives.
Amorphous boron ili ndi bandgap pafupifupi 1.5– 1.6 eV, wapakati pakati pa zitsulo ndi ma insulators, kupangitsa kukhala kotheka kwa zizolowezi zokhala ngati semiconductor ndi ma conductivity osinthika kudzera mu doping kapena kupanga zovuta.
Makulidwe ake otsika (2.34 g/cm AWIRI) imathandizira magwiridwe antchito amagetsi opepuka, pamene ali mkulu mwatsatanetsatane zili ndi mphamvu (~ 58 kJ/g pa okosijeni) amaposa gasi wambiri wokhazikika.
Izi zimayika ufa wa boron ngati zinthu zambirimbiri mu mphamvu, zipangizo zamagetsi, ndi ntchito zomanga.
( Boron Powder)
2. Njira za Synthesis ndi Kupanga Kwa mafakitale
2.1 Kupanga kwa Amorphous Boron
Imodzi mwa njira zodziwika bwino zopangira amorphous boron ndi kuchepetsa boron trichloride (BCl atatu) ndi haidrojeni pa kutentha kwapakati (600– 800 °C) mu activator ya bedi yamadzimadzi.
Izi zimapanga ufa wofiirira mpaka wakuda wopangidwa ndi ma nanoparticles ophatikizana, zomwe kenako zimatulutsidwa kudzera mu leaching ya asidi kuti zichotse ma chloride obweranso komanso kuipitsidwa kwazitsulo..
Njira yosiyana imaphatikizapo kusungunuka kwa kutentha kwa diborane (B ₂ H ₆) pa kutentha kochepa, kupanga ultrafine amorphous boron yokhala ndi malo okwera, ngakhale njira iyi ndi yochepa kwambiri chifukwa cha mtengo wapamwamba komanso kusakhazikika kwa otsogolera borane.
Powonjezera posachedwa, kuchepa kwa magnesiamu kwa B AWIRI O awiri kwapezeka kuti ndi njira yotsika mtengo, ngakhale zimafunika kusamala pambuyo pokonza kuti muchotse zotsatira za MgO ndikukwaniritsa kuyera kwambiri.
Maphunziro aliwonse a kaphatikizidwe amapereka kusagwirizana pakati pa zokolola, ungwiro, pang'ono morphology, ndi mtengo wopanga, kukhudza kusankha kwa mapulogalamu ena.
2.2 Kuyeretsa ndi Kupanga Tinthu
Kusefera kwa post-synthesis ndikofunikira kuti muwonjezere magwiridwe antchito, makamaka m'mapulogalamu amphamvu komanso a digito komwe kuipitsidwa kumagwira ntchito ngati kupewa kapena misampha yolipira.
Mankhwala a hydrofluoric ndi hydrochloric acid amasungunula bwino okusayidi ndi zowononga zitsulo, pomwe kutenthetsa kwamafuta m'malo opanda mpweya kumatha kuchepetsa kuchuluka kwa okosijeni ndikukhazikitsa mawonekedwe a amorphous..
Kuchepa kwa tinthu ting'onoting'ono pogwiritsa ntchito mphero yozungulira kapena mphero ya jet imalola kusinthasintha kwapamwamba komanso kuchitanso zinthu zina, ngakhale mphero yochulukirapo imatha kupanga mapangidwe oyambilira kapena kuipitsidwa ndi media media.
Njira zowonetsera pamwamba, monga kuphimba ndi ma polima kapena ma oxides, amagwiritsidwa ntchito kuyimitsa makutidwe ndi okosijeni wokhazikika pamalo onse osungira ndikuteteza kukhudzika pansi pamikhalidwe yoyatsira.
Njira zauinjiniyazi zimatsimikizira kuti zinthu zikuyenda bwino pamagawo onse azamalonda.
3. Makhalidwe Othandiza ndi Njira Zochitira
3.1 Kuyaka ndi Makhalidwe Amphamvu
Chimodzi mwazinthu zochititsa chidwi kwambiri za amorphous boron ndi monga mpweya wopatsa mphamvu kwambiri muzopanga zolimba komanso nyimbo za pyrotechnic..
Poyatsa, boron imayankha modabwitsa ndi okosijeni kuti ipange boron trioxide (B ₂ O ₃), kutulutsa mphamvu yayikulu misa iliyonse– kupangitsa kuti ikhale yokongola pakuyendetsa ndege, makamaka mu ramjets ndi scramjets.
Komabe, Kugwiritsidwa ntchito kothandiza kumatsutsidwa ndi kuchedwa koyatsira chifukwa cha chitukuko cha viscous B TWO O zinayi zosanjikiza zomwe zimakutira tinthu tating'ono ta boron., kulepheretsa kuwonjezereka kwa okosijeni.
Izi “kutentha kwa moto” yayendetsa kafukufuku ku nanostructuring, pamwamba functionalization, ndi kugwiritsa ntchito stimulants (mwachitsanzo, kusintha zitsulo oxides) kuchepetsa kutentha kwa kutentha ndikuwonjezera mphamvu ya kuyaka.
Ngakhale pali zopinga izi, Kukula kwamphamvu kwa boron ndi makulidwe amphamvu a gravimetric kukupitiliza kupangitsa kuti ikhale yoyenera pamakina oyendetsera mibadwo yotsatira..
3.2 Mapulogalamu a Catalytic ndi Semiconductor
Pamwamba pa mphamvu, amorphous boron imagwira ntchito ngati kalambulabwalo wa zolimbikitsa zochokera ku boron ndi semiconductors.
Imagwira ntchito ngati yocheperako poyimira zitsulo ndipo imalumikizana ndi mayankho a hydrogenation ndi dehydrogenation akabalalika pazothandizira..
Mu mankhwala sayansi, Mafilimu a amorphous boron amasamutsidwa pogwiritsa ntchito mpweya wa mankhwala (CVD) amagwiritsidwa ntchito mu semiconductor doping ndi ma neutron detectors chifukwa cha boron-10's high neutron capture cross-section..
Kuthekera kwake kupanga ma borides okhazikika ndi zitsulo (mwachitsanzo, TiB ₂, ZrB TWO) zimathandiza kaphatikizidwe wa ultra-high-temperature porcelains (Zithunzi za UHTC) kwa machitidwe achitetezo amlengalenga.
Kuphatikiza apo, Mafuta olemera a boron opangidwa kuchokera ku amorphous boron amafufuzidwa muzinthu zamagetsi zamagetsi ndi ma superconductors., kuwonetsa kusinthasintha kwake.
4. Industrial and Emerging Technical Applications
4.1 Zamlengalenga, Chitetezo, ndi Power Solutions
Muzamlengalenga, boron ya amorphous imaphatikizidwa mumafuta olimba kuti apititse patsogolo mphamvu komanso kutentha kwamphamvu mu injini zopumira mpweya..
Amagwiritsidwanso ntchito poyatsira, jenereta gasi, ndi nyimbo za pyrotechnic hold-up chifukwa cha kukhazikitsidwa kwake kwamphamvu kodalirika komanso kotheka.
Mu luso la nyukiliya, Boron-10 ufa wolemeretsa umagwiritsidwa ntchito mu ndodo zowongolera ndi zinthu zoteteza ma neutroni, kukulitsa mphamvu yake yotengera ma neutroni otentha popanda kupanga zinthu zomwe zaipitsidwa kwanthawi yayitali..
Kuphunzira mu ma anode opangidwa ndi boron pamabatire a lithiamu-ion ndi sodium-ion amapeza luso lake lapamwamba laukadaulo. (~ 1780 mAh/g kwa Li five B), ngakhale zovuta ndi kukula kwa kuchuluka ndi chitetezo cha njinga zidakalipo.
4.2 Zida Zapamwamba ndi Malangizo Amtsogolo
Ntchito zomwe zikubwera zimakhala ndi mafilimu a boron-doped ruby for electrochemical sensing ndi madzi mankhwala, komwe malo apadera a digito kapena malonda a boron amawongolera ma conductivity ndi kulimba kwa ma elekitirodi.
Mu nanotechnology, ma amorphous boron nanoparticles amawunikidwa kuti apereke mankhwala omwe akufuna komanso chithandizo chamankhwala, kuwongolera biocompatibility yawo ndi mayankho ku zokopa zakunja.
Njira zopangira zokhalitsa, monga kaphatikizidwe ka plasma komanso njira zochepetsera zobiriwira, akupangidwa kuti achepetse chikoka cha chilengedwe komanso kugwiritsa ntchito mphamvu.
Mapangidwe anzeru zakupanga akuyikidwanso pazizoloŵezi zowotcha zolosera ndikuwonjezera mapangidwe ang'onoang'ono kuti apeze mayankho amphamvu..
Pamene kumvetsetsa kwa chemistry yovuta ya boron kukukulirakulira, mitundu yonse ya crystalline ndi amorphous ili pabwino kuti ikhale ndi maudindo ofunikira kwambiri pazinthu zapamwamba, yosungirako mphamvu, ndi zatsopano zachitetezo.
Powombetsa mkota, boron ufa– makamaka amorphous boron– zimayimira njira yazinthu zambiri zomwe zimagwirizanitsa madera a mphamvu, zamagetsi, ndi kamangidwe kamangidwe.
Awo osiyana kuphatikiza tilinazo mkulu, kukhazikika kwamafuta, ndi zochita za semiconductor zimathandizira kuti pakhale zosintha pazamlengalenga, nyukiliya, ndi mafakitale amakono omwe akutuluka.
5. Wofalitsa
RBOSCHCO ndi ogulitsa odalirika padziko lonse lapansi & wopanga ndi over 12 zaka zambiri popereka mankhwala apamwamba kwambiri komanso Nanomaterials. Kampaniyo imatumiza kumayiko ambiri, monga USA, Canada, Europe, UAE, South Africa, Tanzania, Kenya, Egypt, Nigeria, Cameroon, Uganda, nkhukundembo, Mexico, Azerbaijan, Belgium, Cyprus, Czech Republic, Brazil, Chile, Argentina, Dubai, Japan, Korea, Vietnam, Thailand, Malaysia, Indonesia, Australia,Germany, France, Italy, Portugal etc. Monga wopanga chitukuko cha nanotechnology, RBOSCHCO imalamulira msika. Gulu lathu la akatswiri ogwira ntchito limapereka mayankho abwino kwambiri othandizira kukonza magwiridwe antchito amakampani osiyanasiyana, pangani mtengo, ndi kuthana mosavuta ndi zovuta zosiyanasiyana. Ngati mukuyang'ana kiyubiki boron nitride ufa, chonde omasuka kulankhula nafe ndi kutumiza kufunsa.
Tags: Boron Powder, Amorphous Boron, Amorphous Boron ufa
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