Tswb Pob tsuas yog tsim cov khoom siv iav: Soda txiv qaub iav pob, Borosilicate iav pob thiab pob iav dub.
Borosilicate iav pob
Borosilicate iav yog ib qho "engineered" iav tsim tshwj xeeb rau kev siv hauv chav kuaj thiab kev siv qhov twg thermal, mechanical thiab tshuaj lom neeg mob hnyav heev rau tus qauv, tsev neeg hom soda txiv qaub iav. Nws yog ib hom iav nrog silica thiab boron trioxide ua cov iav tseem ceeb tsim. Borosilicate iav tiv taus thermal shock ntau dua li lwm hom iav. Nws tuaj yeem mus ntawm lub freezer mus rau qhov cub thiab rov qab los dua. Nws lub siab thermal kuj yog vim muaj tsawg coefficients ntawm thermal expansion. Nws feem ntau yog siv rau kev tsim cov reagent fwj vim nws tsis tshua muaj kev ntxhov siab thermal thiab ua tau raws li qhov xav tau ntawm cov chaw kuaj mob feem ntau.
Soda-Lime Glass Ball
Soda-lime iav yog hom iav tshaj plaws. Qhov no tseem hu ua Soda-lime-silica iav. Nws feem ntau yog siv rau lub qhov rais thiab cov iav ntim xws li lub raj mis thiab hub rau dej haus, zaub mov, thiab qee yam khoom siv. Soda-lime iav suav txog li 90 feem pua ntawm cov iav tsim.
Kev sib piv
Silicon Dioxide SiO2, Boron Trioxide B2O3, Sodium Oxide Na2O, thiab Aluminium Oxide Al2O3 yog plaub lub tebchaw ntawm Soda-lime iav thiab Borosilicate iav. Txawm li cas los xij, qhov kev faib ua feem ntawm txhua qhov sib txawv hauv Borosilicate iav thiab Soda-lime iav. Qhov sib tov hauv Borosilicate iav khi tag nrho cov tshuaj nruj dua ua ke, ua rau muaj qhov sib txawv ntau dua. Borosilicate iav muaj feem ntau ntawm silicone dioxide dua Soda txiv qaub iav (80.6 feem pua hauv Borosilicate iav thiab 69 feem pua hauv Soda-lime iav).
Qhov sib txawv tseem ceeb ntawm Borosilicate iav thiab Soda-lime iav suav nrog:
Thermal tsis kam
Ib qho ntawm qhov sib txawv ntawm Soda-lime iav thiab Borosilicate iav yog lawv cov thermal kuj. Borosilicate iav muaj qis CTE (Coefficients ntawm Linear Thermal Expansion) dua li cov iav dej qab zib (li ib feem peb ntawm cov dej qab zib lime iav). Yog li, Borosilicate iav yog ntau resistant rau thermal shock, yog li ntawd, feem ntau yog siv rau cov iav uas yuav tau ncaj qha rhuab, xws li beakers los yog boiling flasks thaum Soda txiv qaub iav yog siv rau iav uas tsis zoo li yuav ncaj qha thiab muaj zog rhuab, rau Piv txwv li petri tais diav, TLC chromatography tso tsheb hlau luam thiab volumetric glassware.
Hardness
Hais txog hardness, Borosilicate iav yog ib qho nyuaj, muaj zog thiab ruaj khov dua li Soda-lime iav. Raws li Mohs nplai ntawm cov ntxhia hardness, pob zeb diamond tus nqi yog 10, chalk yog 1, borosilicate los ntawm 7.5 thiab lwm hom iav ntawm 6. Borosilicate iav tsis ntom (kwv yees 2.23 g / cm3) dua li cov iav dej qab zib lime. vim qhov tsawg atomic loj ntawm boron.
Plasticity
Qhov qis CTE (Coefficients ntawm Linear Thermal Expansion) hauv Borosilicate iav tuaj yeem ua qauv rau hauv cov duab nyuaj xws li lub tshuab nqus tsev vacuum.
Kev tiv thaiv rau acids
Borosilicate iav yog resistant rau cov tshuaj acidotic ntau dua Soda-lime iav thiab Nws yog tsim nyog los siv nyob rau hauv lub chemistry laboratories qhov twg cov acidic thiab alkaline daws yog siv.
