Dab tsi yog ntuj dub kub pob zeb diamond

Pob zeb diamond dub, feem ntau hu ua "dub diamant", yog daim ntawv nyuaj tshaj plaws ntawm pob zeb diamond. Nws yog ib daim ntawv tsis huv ntawm pob zeb diamond polycrystalline uas muaj pob zeb diamond, graphite, thiab amorphous carbon, feem ntau yog ib qho ntxeem tau ntawm nplua - pob zeb diamond. Cov pob zeb dub kub kub tshaj plaws tsuas yog pom nyob hauv Central African Republic thiab Brazil. Raws li kev txheeb xyuas cov hlau lead isotope, dub garnet ntseeg tau tias yog cov khoom ntawm carbon crystallization kwv yees li 3 billion xyoo dhau los. Cov kev tshawb fawb Isotope tau nthuav tawm cov lus qhia ntxiv rau lub noob caj noob ces ntawm dub kub garnet. Cov pa roj carbon isotope tus nqi qis heev (piv rau cov pob zeb diamond, carbon-13 tsis tshua muaj piv rau carbon-12).

 

 

Cov yam ntxwv tseem ceeb

• Xim thiab tsos: Ntshiab, sib xws tsaus nti dub, kiag li opaque, nrog ib tug hlau los yog resin zoo li luster. Nws yog qhov sib txawv ntawm cov pob zeb dub dub ua xim xim los ntawm irradiation lossis kev kho cua sov.
• Hardness thiab toughness: Txawm hais tias cov nanocrystals uas ua rau nws muaj hardness tsis tshua muaj siab, vim muaj kev sib tshuam ntawm cov qauv polycrystalline, nws tag nrho toughness yog zoo heev, ntau resistant rau kev puas tsuaj tshaj li ib txwm siv lead ua pob zeb diamond, tab sis kuj nyuaj rau txiav thiab polish.
• Porosity thiab tsawg ntom: Feem ntau muaj qhov pores sab hauv, yog li qhov ceev feem ntau qis dua li cov pob zeb diamond zoo tib yam.
• Tsis muaj cleavage: Ordinary pob zeb diamond muaj cov dav hlau tsis yooj yim (cleavage) raws lawv cov qauv siv lead ua, thaum cov pob zeb dub tsis ua, uas ua rau lawv cov tawv tawv ntxiv.

 

Cov chaw tsim khoom loj

• Ntau tshaj 95% ntawm lub ntiaj teb ntuj dub pob zeb diamond yog tsim nyob rau hauv ob qhov chaw:
• Brazil: Tshwj xeeb yog Minas Gerais thiab Bahia xeev.
• Central African koom pheej.
• Qhov kev faib tawm loj heev ntawm cov hauv paus chiv keeb no txhawb nqa qhov kev xav ntawm "cov neeg tuaj ncig txawv teb chaws" - lawv tuaj yeem tshwm sim los ntawm ib lossis ob peb qhov tshwj xeeb cuam tshuam cov xwm txheej.

 

Tus nqi thiab daim ntawv thov

• Cov hniav nyiaj hniav kub: Vim nws qhov tsis tshua muaj thiab tshwj xeeb dub ntxim nyiam thiab keeb kwm keeb kwm yav dhau, loj, siab - zoo nkauj dub kub thiab pob zeb diamond yog cov nyiam ntawm kev lag luam hniav nyiaj hniav kub sab saum toj, nrog rau cov nqi ntau. Cov piv txwv nto moo tshaj plaws yog "Black Orlov" hnyav 312.24 carats thiab "Mystery" hnyav 555.55 carats.
• Kev siv hauv kev lag luam: Vim nws qhov hardness siab heev thiab tawv, ntuj dub pob zeb diamond hmoov thiab cov khoom siv los tsim cov khoom saum toj kawg nkaus -notch laum khoom, txiav cov cuab yeej, abrasives, thiab hnav- cov coatings resistant, tshwj xeeb tshaj yog nyob rau hauv teb xws li roj av kev tshawb fawb thiab precision machining.
• Tus nqi tshawb fawb: Raws li tus xa xov tuaj yeem los ntawm qhov chaw sab nrauv, nws muaj qhov tseem ceeb ntawm kev tshawb fawb rau kev kawm txog keeb kwm thiab kev hloov pauv ntawm lub hnub ci thiab txawm lub ntiaj teb.

 

 

Cov ntsiab lus

• Ntuj pob zeb diamond dub yog ib qho tsis tshua muaj thiab tsis meej pem ntawm pob zeb diamond hauv qhov xwm txheej. Nws tsis yog 'dub version ntawm pob zeb diamond zoo tib yam', tab sis ib qho polycrystalline aggregate tej zaum muab tau los ntawm qhov chaw sab nrauv thiab tsim los ntawm nano- pob zeb diamond loj. Nws yog lub npe hu rau nws qhov tob, ntshiab xim dub, tsis tshua muaj siab hardness, txawv txawv toughness, thiab legendary cosmic keeb kwm.