Ukuqonda Umehluko Phakathi kweClay Graphite Crucibles kanye neGraphite Silicon Carbide Crucibles

Lapho wenza ukuhlolwa kwamakhemikhali okushisa okuphezulu noma izinhlelo zokusebenza zezimboni, ukukhethwa kwezinto ezibonakalayo kudlala indima ebalulekile ekuqinisekiseni impumelelo nokuphepha kwenqubo. Izinhlobo ezimbili ezivame ukusetshenziswa ze-crucible ziyiama-clay graphite cruciblesfuthigraphite silicon carbide crucibles. Ukuqonda ukwakheka kwayo okubalulekile, izinga lokushisa eliphikisayo, ukungangeni kwamakhemikhali, kanye nokuqhutshwa kwe-thermal kubalulekile ekwenzeni isinqumo esinolwazi lapho kukhethwa i-crucible efanelekile yezidingo ezithile zaselabhorethri noma zezimboni.

isithako esibonakalayo:
I-clay graphite crucible yakhiwa ikakhulukazi i-graphite, ubumba kanye nenani elithile lokuthambisa, futhi yaziwa ngokungabi namandla kwamakhemikhali. Ngakolunye uhlangothi, i-graphite silicon carbide crucible yenziwe nge-silicon carbide powder kanye namanye ama-oxides angavamile emhlabeni, futhi inezici zokumelana nokushisa okuphezulu, ukumelana nokushaqeka okuhle kakhulu kokushisa, kanye nokungabi namandla kwamakhemikhali aphezulu.

Izinga lokushisa lokumelana nomlilo:
Izinga lokushisa eliphikisayo le-clay graphite crucibles ngokuvamile lifinyelela cishe ku-1200 ° C, kuyilapho i-graphite silicon carbide crucibles ingamelana namazinga okushisa angaphezu kuka-1500 ° C. Lokhu kwenza i-graphite silicon carbide crucibles ifaneleke kakhulu ezinhlelweni ezidinga amazinga okushisa aphezulu ekuhlolweni kwamakhemikhali nezinqubo zezimboni.

I-inert yekhemikhali:
Zombili izinhlobo zama-crucible zibonisa izinga elithile lokungangeni kwamakhemikhali, okuhlala kuzinzile ku-asidi eminingi, i-alkali, nezixazululo zikasawoti futhi imelana nokugqwala. Kodwa-ke, ingxenye yobumba ezitsheni ze-graphite crucible yenza kube lula ukumunca izakhi zokulandelela nokungcola uma kuqhathaniswa ne-graphite silicon carbide crucibles.

I-Thermal Conductivity:
I-graphite ine-thermal conductivity ephezulu futhi ingakhipha ukushisa ngokushesha. Kodwa-ke, ngenxa yesakhiwo esivulekile se-clay graphite crucible, amabala amnyama athambekele ekuveleni ebusweni bawo futhi adinga ukuhlanzwa njalo. Ngokuphambene, i-graphite silicon carbide crucibles ine-conductivity ephansi ye-thermal futhi ngeke ishiye amabala ebusweni. Ngaphezu kwalokho, ubulukhuni babo obuphezulu buvimbela ukugqoka nokuguqulwa.

Khetha i-crucible efanele:
Lapho ukhetha i-crucible labhorethri yamakhemikhali, izidingo ezithile kufanele zibhekwe. I-clay graphite crucibles ifanele ukuhlolwa kwekhemistri evamile, kuyilapho i-graphite silicon carbide crucibles ilungele ukuhlolwa okudinga izinga lokushisa eliphezulu nezimo ezinzima kakhulu. Kubalulekile ukulandela ngokuqinile imiyalelo yokusetshenziswa ukuze ugweme ukwehluleka kokuhlolwa ngenxa yokusebenza okungalungile.

Kafushane, ukuqonda umehluko phakathi kwe-clay graphite crucibles kanye ne-graphite silicon carbide crucibles kubalulekile ekukhetheni i-crucible efaneleka kakhulu yelabhorethri ethile noma isicelo sezimboni. Ngokucabangela izici ezifana nezinga lokushisa eliphikisayo, ukungabi namandla kwamakhemikhali kanye nokuqhutshwa kokushisa, abacwaningi kanye nochwepheshe bezimboni bangenza izinqumo ezinolwazi ukuze baqinisekise impumelelo nokuphepha kokuhlolwa nezinqubo.