Synthetic Alexandrite - Stretched - Czochralski - Crystal Sawv - Video
Txheem:
Alexandrite yog ib lub pob zeb zoo kawg nkaus.
Yuav cov gemstones ntuj hauv peb lub khw gemstone
hluavtaws alexandrite
Qhov sib txawv tseem ceeb ntawm alexandrite thiab lwm yam gemstones yog nws lub peev xwm hloov xim nyob ntawm lub teeb pom kev zoo. Alexandrite yog bluish ntsuab los yog nyom ntsuab thaum dawb dag fluorescent teeb pom kev zoo siv, tab sis hloov ntshav los yog ruby liab nyob rau hauv tshav ntuj los yog tswm ciab.
Qhov tshwm sim no yog hu ua cov nyhuv alexandrite thiab feem ntau siv nrog lwm cov zaub mov uas tuaj yeem hloov xim. Piv txwv li, garnets uas tuaj yeem hloov xim kuj hu ua alexandrite garnets.
Alexandrite yog ntau yam ntxhia chrysoberyl. Kev hloov xim txawv txawv yog vim muaj cov chromium ions nyob rau hauv cov khoom siv lead ua lattice. Tam sim no, ntuj alexandrite yog suav tias yog ib qho ntawm cov pob zeb zoo nkauj tshaj plaws thiab tsis tshua muaj.
Tau kawg, qhov no tau ua rau cov fakes tshwm sim nyob rau hauv kev ua lag luam uas tsuas yog me ntsis zoo li cov pob zeb qub, vim lawv tsis cuam tshuam qhov zoo nkauj ntawm cov xim hloov thiab kev ua si ntawm lub teeb hauv ntuj alexandrite. Corundum fakes muaj ntau heev.
Czochralski txheej txheem (rub tawm)
Cov txheej txheem Czochralski yog ib txoj kev loj hlob siv lead ua siv los tsim ib qho crystals ntawm semiconductors (xws li silicon, germanium thiab gallium arsenide), hlau (xws li palladium, platinum, nyiaj, kub), ntsev thiab hluavtaws gemstones. Cov txheej txheem no muaj npe tom qab tus kws tshawb fawb Polish Jan Czochralski, uas tau tsim txoj hauv kev hauv xyoo 1915 thaum kawm txog tus nqi crystallization ntawm cov hlau.
Nws tau ua qhov kev tshawb pom no los ntawm lub sijhawm, thaum tshawb xyuas tus nqi ntawm crystallization ntawm cov hlau, thaum es tsis txhob dipping ib tug cwj mem rau hauv number case, nws tau ua li ntawd nyob rau hauv molten tin thiab taug qab ib tug tin xov, uas tom qab ntawd tig tawm los ua ib tug siv lead ua.
Daim ntawv thov tseem ceeb tshaj plaws yuav yog kev loj hlob ntawm cov cylindrical ingots loj lossis spheres ntawm ib leeg siv lead ua silicon siv hauv kev lag luam hluav taws xob los tsim cov khoom siv semiconductor xws li kev sib xyaw ua ke.
Lwm cov semiconductors xws li gallium arsenide kuj tuaj yeem loj hlob los ntawm txoj kev no, txawm hais tias qhov tsis xws luag hauv qhov no tuaj yeem tau txais los ntawm kev siv ntau yam ntawm Bridgman-Stockbarger txoj kev.
Synthetic alexandrite - Czochralski
Cov roj formula: BeAl2O4:Cr3+
Crystal system: orthorhombic
Hardness (Mohs): 8.5
Qhov ceev: 3.7
Refractive Index: 1.741-1.75
Dispersion: 0.015
suav nrog: zaub mov dawb. (qhov tseem ceeb xaiv los ntawm ntuj alexrite: mists, tawg, qhov, multiphase inclusions, quartz, biotite, fluorite)
Sau ntawv cia Ncua