Platinum tau ntev dhau los tseem tsis tau muaj txiaj ntsig ntau tshaj li kub thiab nyiaj, raws li ntau tus xav tias nws tsuas yog ib qho "txaus ntshai" hom kub dawb. Tab sis thaum cov hniav nyiaj hniav kub tau txaus siab rau nws, platinum, vim nws cov khoom, dhau los ua cov nqi ntau dua li lwm cov khoom muaj hlau.
Platinum xim thiab lub zog
Lub npe heev "platinum" tau kis vim yog nws qhov zoo sib xws sab nraud nrog nyiaj. Nyiaj hauv lus Spanish yog "plata", thiab "platina" yog txhais ua me me, lub teeb nyiaj, "nyiaj." Platinum muaj lub xim dawb silvery, qee zaum nrog lub gint gint. Nws tuaj yeem nrhiav pom nyob rau hauv ob qho tib si hauv daim ntawv dawb huv, raws li kev nug, thiab hauv cov khoom sib xyaw. Qhov ntom ntawm platinum tseem muaj siab heev, 21, 45 g / cc. saib Rau Qhov sib piv, qhov ntom ntawm kub yog 19, 3 g / cu. cm.
Yog tias platinum nws tus kheej yog silvery-dawb, vim li cas thiaj li yog nws cov hom pom nyob rau hauv cov xim sib txawv me ntsis? Qhov yog tias platinum nuggets tsis tshua muaj "ntshiab", raws li txoj cai, lawv muaj impurities uas txiav txim siab xim ntawm cov hlau. Lub impurities yuav suav nrog hlau, tooj liab, iridium, palladium, rhodium thiab lwm yam hlau. Tsis tas li ntawd, qee zaum jewellers lawv tus kheej tsim cov alloys ntawm platinum nrog lwm cov khoom muaj nqi.
Piv txwv li, rau kev teeb tsa cov pob zeb zoo nkauj, platinum feem ntau siv, uas muaj cov nyiaj, kub lossis tooj. Raws li, zas ntawm cov hlau tuaj yeem yog daj lossis xim liab. Tungsten thiab palladium, uas tseem tuaj yeem ua cov ntsiab lus ntawm platinum alloy, hloov nws cov xim rau xim dawb lossis ci xim grey.
Cov qauv ntawm platinum 850, 900, 950 yog nrov hauv Lavxias. Qauv 950 txhais tau hais tias muaj pes tsawg leeg tsim los tsim cov hniav nyiaj hniav kub, uas 95% yog platinum, thiab 5% yog ntau yam tsis txaus.
Platinum 850 thiab 900 cov hnoos qeev feem ntau siv tsis yog rau cov hniav nyiaj hniav kub, tab sis rau cov hom phiaj txuj ci, piv txwv, rau kev kho mob.
Vim tias qhov tseeb hais tias platinum feem ntau ua rau daim ntawv alloys nrog cov khoom sib ntxiv, cov hlau no yuav luag tsis yooj yim kom paub qhov txawv ntawm qhov muag los ntawm nyiaj dawb lossis kub. Koj yuav tsum tau coj kev los ntawm cov qauv, kev sib xyaw mis platinum yog "PT 950", "PT 900", "PT 850". Tab sis tus fineness ntawm 750 twb txhais tau tias koj pom tsis platinum, tab sis dawb kub.
Platinum keeb kwm
Rau ib lub sijhawm ntev, platinum yog qhov tsis nrov; nws raug tsim txiaj rau ib nrab npaum li nyiaj. Qhov no tau piav qhia los ntawm qhov tseeb tias cov neeg ncig tebchaws Spanish uas tshawb nrhiav nws hauv South America tau pom tias platinum yog qhov refractory. Qhov no ua rau muaj teeb meem loj heev rau kev siv cov hlau nyob hauv cov hnub ntawd, yog li platinum pom tau hais tias kev siv tsawg.
Tab sis kom sai li tus kws muag kub pom tias cov kub dawb zoo li cas nrog kub, nws tus nqi nce cim, tab sis tsuas yog ntawm cov jewellers lawv tus kheej, uas sib xyaw cov hlau no nrog kub, uas tuaj tawm pheej yig dua kub dawb, thiab tsis qis dua hauv ntom rau nws Cov. Tab sis dhau sijhawm, qhov "thev naus laus zis" tau pom, platinum txwv tsis pub tuaj rau hauv Spain, thiab nws cov ntawv pov tseg tau pov rau hauv hiav txwv.
Sij hawm dhau los, platinum tau raug txiaj ntsig los ntawm cov neeg Iyiv thaum ub thiab Incas.
Nyob Fab Kis, platinum muaj hmoo dua. Louis XVI xav tias nws tsuas yog hlau tsim nyog ntawm kev ua neej. Qhov laj thawj yog tias platinum yuav luag tsis taus, nws tsis xeb. Tej tshuaj uas ua rau kub thiab nyiaj yuav tseg platinum. Platinum bypasses tag nrho lwm cov hlau muaj txiaj ntsig hauv lub zog, nws tsuas yog cuam tshuam los ntawm aqua regia.
