kub vs dawb kub
Kub thiab dawb kub yog cov khoom kim heev siv los ua jewelery. Cov neeg xaiv kub los yog dawb kub nyob ntawm seb lawv nyiam. Tsuas yog ob peb qhov sib txawv, ob qho tib si yog cov khoom pib zoo rau jewelleries.
kub
Kub yog ib qho kev hloov pauv hlau nrog cov cim tshuaj Au. Au yog los ntawm lo lus Latin 'aurum' uas txhais tau tias 'ci ntsa iab'. Kub yog nyob rau hauv pawg 11 ntawm lub sij hawm lub sij hawm, thiab nws atomic tooj yog 79. Nws electron configuration yog [Xe] 4f14 5d10 6s 1 Kub yog cov hlau ci uas muaj xim daj xim hlau. Tsis tas li ntawd, nws yog ib qho khoom siv tau yooj yim thiab ua tau zoo.
Gold yog dav siv los ua cov hniav nyiaj hniav kub thiab cov mlom. Nws yog suav hais tias yog ib qho khoom muaj nqis heev. Ib qho tseem ceeb ntawm cov khoom kub hauv nws qhov tsis tshua muaj zog. Kub tsis hnov mob nrog ya raws thiab oxygen hauv huab cua. Yog li ntawd, tsis muaj teeb meem ntev npaum li cas nws raug huab cua, kub oxide txheej yuav tsis tsim thiab, yog li ntawd, nws cov xim tsis ploj los yog hloov. Txij li thaum kub tsis hnov mob nrog lwm yam tshuaj tau yooj yim, nws tshwm sim raws li cov khoom dawb hauv qhov xwm txheej. Cov khoom kub yog pom nyob rau hauv pob zeb. Johannesburg, South Africa muaj ib qho ntawm cov nyiaj kub loj tshaj plaws. Tsis tas li ntawd, Russia, Tebchaws Asmeskas, Australia thiab Peru yog cov neeg tsim khoom kub hauv ntiaj teb.
Kub tsim cov hlau nrog lwm cov hlau yooj yim. Kub muaj +1 thiab +3 oxidation xeev feem ntau. Kub ions nyob rau hauv ib qho kev daws tau yooj yim txo mus rau 0 oxidation lub xeev, yog li kub yuav precipitated tawm. 197Au yog tib qho isotope ruaj khov ntawm kub. Ntawm cov ntawv thov kub, nws tau siv rau ntau pua xyoo. Nws tau suav hais tias muaj nuj nqis los ntawm keeb kwm thiab tau raug siv los ua txiaj. Thaum ua cov hniav nyiaj hniav kub, cov kub ntshiab (24k) tsis siv. Feem ntau nws yog alloyed nrog rau lwm yam hlau thiab 22k, 18k, 9k thiab lwm yam kub yog siv rau jewellery ua txheej txheem.
White Gold
Dawb kub yog ib qho hlau ua los ntawm kev sib xyaw kub nrog lwm cov hlau dawb. Cov hlau alloying no tuaj yeem yog nyiaj, palladium lossis manganese. Nyob ntawm cov hlau alloying thiab cov proportions siv, cov khoom ntawm kub dawb tuaj yeem sib txawv. Piv txwv li, thaum palladium tov nrog kub, qhov tshwm sim dawb kub yuav mos thiab pliable. Thaum npib tsib xee thiab kub sib xyaw, nws yuav nyuaj thiab muaj zog.
Dawb kub lub purity yog muab rau hauv karats. Piv txwv li, kub dawb tuaj yeem yog 18kt, 14kt, 9kt, thiab lwm yam. Cov xim ntawm cov kub dawb uas peb pom tsis yog xim ntawm cov kub dawb. Cov xim dawb los ntawm rhodium plating thiab feem ntau cov xim ntawm cov kub dawb yog xim grey. Dawb kub yog siv los ua jewelery. Cov alloys siv rau qhov no yog kub, palladium, nyiaj thiab kub, npib tsib xee, tooj liab, thiab zinc. Txawm li cas los xij, qee tus neeg tsis haum rau npib tsib xee yog li nws tsis siv dav hauv kub dawb.
kub vs dawb kub
