Hauv thaj teb muaj cov khoom siv precision, qhov sib zog ntawm cov pob zeb uas muaj zog, thiab lub zog ua kom haum, thiab lub zog compressive), es tsis yog nws tus kheej. Txawm li cas los xij, xim feem ntau cuam tshuam qhov sib txawv ntawm cov ntxhia hauv cov ntxhia thiab tsim ib puag ncig. Yog li ntawd, hauv kev siv tswv yim, granite ntawm qee cov xim yog nyiam dua vim nws qhov kev ua tau zoo tshaj plaws. Cov hauv qab no yog qhov kev tsom xam tshwj xeeb:
I. Indirect Association ntawm Xim thiab Stability
Cov xim ntawm granite yog txiav txim los ntawm nws cov ntxhia muaj pes tsawg leeg, thiab cov ntxhia muaj pes tsawg leeg ncaj qha cuam tshuam rau nws lub cev:
Lub teeb-xim granite (xws li greyish dawb, lub teeb liab)
Mineral muaj pes tsawg leeg: Feem ntau quartz thiab feldspar (sau txog li 60% mus rau 80%), nrog me me ntawm mica lossis amphibole.
Quartz (nrog rau qhov ceev ntawm 2.65g / cm³) thiab feldspar (nrog rau qhov ntom ntawm 2.5-2.8g / cm³) muaj hardness siab, muaj zog tshuaj stability, thiab qis coefficient ntawm thermal expansion (feem ntau 5-8 × 10⁻⁶ / ℃), thiab tsis yooj yim cuam tshuam los ntawm kev hloov kub.
Cov yam ntxwv ntawm cov qauv: tsim nyob rau hauv ib qho chaw ruaj khov geological (xws li cua txias qeeb hauv qhov ntiav ntawm lub ntiaj teb lub crust), nrog cov crystalline tsis zoo, cov qauv ntom ntom, tsis tshua muaj porosity (0.3% - 0.7%), qis dej nqus tus nqi (<0.15%), thiab muaj zog tiv thaiv deformation.
Cov ntawv thov: Cov cuab yeej siv hluav taws xob tsim hluav taws xob, cov cuab yeej kho qhov muag pom tseeb (xws li photolithography tshuab platforms), uas yuav tsum muaj qhov tseeb qhov tseeb ntev.
Tsaus granite (xws li dub, tsaus ntsuab)
Mineral muaj pes tsawg leeg: nplua nuj nyob rau hauv hlau thiab magnesium minerals (xws li amphibole, biotite, pyroxene), thiab ib nrab muaj cov hlau hnyav xws li magnetite thiab ilmenite.
Amphibole (density 3.0-3.4g / cm³) thiab biotite (density 2.7-3.1g / cm³) muaj qhov ntom ntom, tab sis lawv cov coefficients ntawm thermal expansion yog me ntsis siab dua li cov quartz (txog 8-12 × 10⁻⁶ / ℃), thiab lawv cov txheej txheem ntawm oxidation tuaj yeem ua rau muaj kev hloov pauv ntawm cov hlau.
Cov yam ntxwv ntawm cov qauv: Feem ntau tsim nyob rau hauv high-temperature thiab high-pressure ib puag ncig (xws li ceev ceev txias ntawm sib sib zog nqus magma), nrog ntxhib crystalline hais thiab tseem ceeb sib txawv nyob rau hauv cov yam ntxwv ceev. Qee qhov tsaus nti granite (xws li Jinan Green) muaj cov qauv zoo sib xws thiab ruaj khov vim muaj kev ua haujlwm siab magmatic thiab tso tawm tag nrho ntawm kev ntxhov siab sab hauv.
Cov ntawv thov: Cov cuab yeej siv lub tshuab hnyav hnyav, cov tshuab ntsuas kev sib koom tes loj (CMM), uas yuav tsum tau ua haujlwm siab thiab cuam tshuam.
Ii. Core Indicators of Stability in Industrial Scenarios
Txawm li cas los xij ntawm cov xim, cov ntsiab lus tseem ceeb rau granite hauv cov khoom siv precision muaj xws li:
Thermal stability
Muab qhov tseem ceeb rau kev xaiv ntau yam uas tsis tshua muaj coefficient ntawm thermal expansion (<8 × 10⁻⁶ / ℃) kom tsis txhob muaj cov khoom raug sib txawv los ntawm qhov kub thiab txias. Lub teeb-xim granite (xws li sesame dawb) muaj thermal stability zoo dua vim nws cov ntsiab lus quartz siab.
Cov qauv compactness
Granite nrog qhov porosity tsawg dua 0.5% thiab qhov nqus dej tsawg dua 0.1% tsis ua rau adsorbing noo noo lossis impurities thiab tsis zoo li yuav deform dua siv mus ntev. Ob leeg Jinan Green nyob rau hauv maub granite (nrog ib tug porosity ntawm 0.3%) thiab Shanxi Dub nyob rau hauv lub teeb granite (nrog ib tug porosity ntawm 0.2%) ua tau raws li qhov yuav tsum tau ntawm siab ceev.
Mechanical zog
Lub zog compressive yog ntau dua 150MPa thiab lub zog flexural yog ntau dua 12MPa, ua kom muaj kev ruaj ntseg ntev ntawm kev nqa cov cuab yeej precision. Tsaus granite (xws li Indian dub) feem ntau muaj zog dua txhua yam vim muaj hlau thiab magnesium cov zaub mov thiab tsim nyog rau cov xwm txheej hnyav.
Tshuaj tiv thaiv corrosion
Quartz thiab feldspar muaj zog tiv taus acid thiab alkali corrosion. Yog li ntawd, lub teeb-xim granite (xws li sesame grey) yog qhov tsim nyog rau corrosive ib puag ncig hauv kev lag luam tshuaj thiab semiconductor.
Iii. Cov kev xaiv tseem ceeb thiab cov xwm txheej hauv Kev Lag Luam
Lub teeb-xim granite: Qhov kev xaiv zoo tshaj plaws rau cov xwm txheej siab
Cov neeg sawv cev ntau yam:
Sesame Dawb: Ua nyob rau hauv Fujian, nws yog lub teeb grey nyob rau hauv cov xim, nrog ib tug quartz ntsiab lus ntawm ntau tshaj 70%. Nws coefficient ntawm thermal expansion yog 6 × 10⁻⁶ / ℃. Nws yog siv nyob rau hauv semiconductor lithography tshuab platforms thiab aerospace tshuaj xyuas cov khoom.
Jinan Ntsuab: Tsaus grey, cov qauv tsis sib xws, lub zog muaj zog 240MPa, feem ntau siv rau lub hauv paus ntawm kev sib koom tes ntsuas tshuab (CMM).
Qhov zoo: Cov xim zoo sib xws, ua kom yooj yim rau txoj kev kho qhov muag calibration ntawm cov khoom siv kho qhov muag; Nws muaj me me thermal deformation thiab haum rau nanometer-theem precision yuav tsum.
Tsaus granite: Nyiam rau cov dej num hnyav thiab cuam tshuam-resistant scenarios
Cov neeg sawv cev ntau yam:
Black Galaxy: Dub nyob rau hauv cov xim, muaj ilmenite, nrog ib tug ceev ntawm 3.05g / cm³ thiab ib tug compressive zog ntawm 280MPa. Nws yog siv rau hnyav-duty tshuab cuab yeej qhia rails thiab automotive manufacturing fixtures.
Mongolian dub: Tsaus ntsuab, feem ntau yog amphibole, muaj zog tiv thaiv, siv rau hauv paus ntawm cov khoom siv mining.
Qhov zoo: siab ceev, muaj zog rigidity, muaj peev xwm ntawm absorbing mechanical vibration, haum rau high-load industrial puag ncig.
Plaub. Xaus: Xim tsis yog qhov txiav txim siab; kev ua haujlwm yog qhov tseem ceeb
Xim ≠ stability: Ob lub teeb-xim thiab tsaus-xim granite muaj ntau yam ruaj khov. Qhov tseem ceeb yog nyob rau hauv lub purity ntawm cov ntxhia, lub uniformity ntawm tus qauv, thiab lub cev ntsuas.
Scene adaptation txoj cai:
Precision kho qhov muag / cov khoom siv hluav taws xob: Xaiv cov xim xim xim uas muaj cov ntsiab lus quartz siab (xws li cov noob hnav dawb), hais txog thermal stability thiab qhov tseeb ntawm qhov chaw.
Cov cuab yeej siv tshuab hnyav / kev lag luam tshuab: xaiv cov xim tsaus, cov hlau magnesium ore hom (xws li Jinan xiav), hais txog kev siv lub zog thiab kev cuam tshuam.
Kev xa tawm tswv yim: Txheeb xyuas qhov tsis xws li cov coefficient ntawm thermal expansion, dej nqus dej, thiab compressive zog los ntawm kev xeem ntawv qhia (xws li GB / T 18601-2020 "Natural Granite Building Slabs"), es tsis yog txiav txim los ntawm cov xim xwb.
Hauv kev xaus, hauv kev lag luam kev lag luam, kev xaiv ntawm granite tseem ceeb rau kev ua tau zoo thiab ntxiv los ntawm cov xim. Kev ntsuam xyuas dav dav yuav tsum tau ua ua ke nrog cov khoom siv tshwj xeeb thiab kev siv ib puag ncig.
Post lub sij hawm: May-19-2025