Muaj feem cuam tshuam txog cov txiaj ntsig ntawm kev ntsuas thermogravimetric

Qauv loj thiab qauv cuvette

Rau kev txiav txim siab thermogravimetric, cov qauv ntim yuav tsum me me, feem ntau 2 ~ 5mg. Ntawm ib sab, nws yog vim qhov rhiab heev ntawm qhov ntsuas qhov sib npaug siab heev (txog 0.1ug). Ntawm qhov tod tes, yog tias cov qauv ntim loj, qhov hloov pauv huab cua yuav ntau dua, qhov ntsuas kub sab hauv ntawm cov qauv yuav loj, thiab txawm tias cov nyhuv thermal ntawm cov qauv yuav ua rau cov qauv ntsuas kub hloov pauv ntawm linearity. Qhov kub yog programmed los hloov TG nkhaus. Qhov zoo dua qhov particle loj yog, qhov zoo dua. Flatten tus qauv kom ntau li ntau tau. Yog hais tias cov particle loj loj, cov tshuaj tiv thaiv decomposition yuav txav mus rau qhov kub thiab txias.

Cov khoom siv ntawm cov qauv cuvette yuav tsum muaj qhov kub thiab txias, thiab yog inert rau cov qauv, cov khoom nruab nrab, cov khoom kawg thiab cov huab cua, uas yog, nws tsis tuaj yeem muaj cov tshuaj tiv thaiv thiab catalytic. Cov qauv siv feem ntau yog platinum, ceramic, quartz, iav, txhuas thiab lwm yam. Kev saib xyuas tshwj xeeb yuav tsum tau them rau cov qauv sib txawv kom siv cov khoom sib txawv ntawm cov qauv cuvette, txwv tsis pub nws yuav ua rau cov qauv cuvette puas. Piv txwv li: Sodium carbonate yuav hnov ​​​​mob nrog SiO2 hauv quartz thiab ceramics ntawm qhov kub thiab txias los tsim sodium silicate, yog li nws zoo li sodium carbonate. Rau cov qauv alkaline, tsis txhob siv txhuas, quartz, iav, lossis ceramic qauv tais diav thaum kuaj. Lub platinum qauv cuvette yog nquag siv rau hydrogenated lossis dehydrogenated organic teeb meem, thiab nws tsis haum rau cov qauv polymer uas muaj phosphorus, sulfur thiab halogen.

Cua sov tus nqi

Qhov ceev ntawm cua sov, qhov kub thiab txias hysteresis. Piv txwv li, polystyrene decomposes hauv N2. Thaum lub degree ntawm decomposition yog noj li 10 feem pua ​​​​yuav poob, qhov txawv yog 37 ntawm 1 degree / min thiab 394 degree ntawm 5 degree / min. degree. Cov cua kub ceev ceev txo qhov kev daws teeb meem ntawm qhov nkhaus thiab poob cov ntaub ntawv ntawm qee cov khoom nruab nrab. Piv txwv li, qeeb cua sov ntawm cov dej uas muaj cov sib txuas tuaj yeem pom qee qhov cuam tshuam nrog kev poob dej.

Atmosphere cawv

Kev hloov pauv ntawm cov huab cua puag ncig ntawm lub thermobalance muaj qhov cuam tshuam loj rau TG nkhaus. Qhov decomposition kub ntawm TG nkhaus ntawm CaCO3 hauv lub tshuab nqus tsev, cua thiab CO2 yog ze li ntawm 600 degree. Yog vim li cas yog tias CO2 yog cov khoom decomposition ntawm CaCO3. Lub xub ntiag ntawm CO2 nyob rau hauv cov huab cua yuav inhibit CaCO3. Lub decomposition kub nce.

Hauv huab cua, polypropylene yuav muaj qhov hnyav nce ntawm 150 ~ 180 degree, uas yog qhov tshwm sim ntawm polypropylene oxidation, thiab tsis muaj qhov hnyav nce hauv N2. Cov roj ntws nrawm feem ntau yog 40ml / min, thiab qhov nrawm nrawm yog qhov zoo rau kev hloov pauv cua sov thiab cov pa roj ntws tawm.

Volatile condensation

Decomposition khoom volatilize los ntawm cov qauv thiab feem ntau re-condensate ntawm tsawg kub. Yog hais tias lawv condense ntawm cov hlau-daim qauv cuvette, qhov ntsuas qhov hnyav yuav qis dua. Thaum qhov kub nce ntxiv, lub condensate yuav volatilize dua, uas yuav ua rau poob ceeb thawj. , Txhawm rau deform TG nkhaus. Txoj kev daws teeb meem yog txhawm rau txhawm rau nce cov roj ntws kom ua rau cov volatiles tawm hauv cov qauv cuvette tam sim ntawd.

kev buoyancy

Qhov kev hloov pauv ntawm buoyancy yog vim qhov thermal expansion ntawm cov roj nyob ib puag ncig cov qauv vim qhov kub thiab txias, uas txo cov txheeb ze ntom ntom thiab txo cov buoyancy, uas ua rau kom pom tseeb qhov hnyav ntawm cov qauv. Piv txwv li, lub buoyancy ntawm 300 degree yuav txo tau mus rau ib nrab ntawm lub buoyancy ntawm chav tsev kub, thiab nws yuav raug txo kom txog li 1/4 ntawm 900 degree. Txoj kev kho cov tswv yim yog ua ib qho kev sim dawb paug (tsis muaj qhov ntsuas kub ntsuas) kom tshem tawm qhov pom tseeb qhov hnyav.