Umahluko phakathi kwe-silicon carbide graphite crucible kunye ne-graphite crucible

Kukho umahluko omkhulu phakathii-silicon carbide crucibleskunye ne-graphite crucibles kwiinkalo ezininzi ezifana nezixhobo, iinkqubo, ukusebenza, kunye namaxabiso. Le yantlukwano ayichaphazeli kuphela inkqubo yokuvelisa, kodwa iphinda inqume ukusebenza kwayo kunye neemeko zesicelo.

umahluko omkhulu
I-graphite crucibles yenziwe ngokukodwa nge-graphite ye-flake yendalo kwaye isebenzisa udongwe njenge-binder. Le ndibaniselwano inika i-graphite crucible ebalaseleyo conductivity ye-thermal kunye nokumelana nobushushu obuphezulu, iyenza ilungele ukusetyenziswa kwiinkqubo zokunyibilika kobushushu obuphezulu. Ulwakhiwo olukhethekileyo kunye ne-thermal conductivity ephezulu ye-flake ye-graphite yendalo yenza i-graphite crucibles idume kakhulu kumashishini e-metallurgical kunye ne-Foundry.

I-Silicon carbide crucible isekelwe kwi-graphite ye-flake yendalo, kunye ne-silicon carbide njengeyona nto iphambili kunye ne-resin ephezulu yokushisa njenge-binder. Njengemathiriyeli enzima kakhulu, i-silicon carbide inokumelana nokunxiba okuphezulu kakhulu kunye nokuzinza kwe-thermal, evumela ukuba i-silicon carbide crucibles isetyenziswe kwiindawo ezinobunzima ngakumbi. Ukusetyenziswa kweresin yobushushu obuphezulu ikwanyusa amandla ayo onke e-crucible kunye nokuqina.

Umahluko kwinkqubo
Inkqubo yokwenziwa kwe-graphite crucible ikakhulu ixhomekeke kwi-manual kunye ne-mechanical pressing. Izikhonkwane ezincinci zegraphite ngokuqhelekileyo zenziwe ngokucinezela ngoomatshini, emva koko zifakwe kwi-oven kwiqondo lokushisa eliphakamileyo le-1,000 degrees, kwaye ekugqibeleni zigqunywe nge-anti-corrosion glaze okanye ipeyinti yobungqina bomswakama ukwandisa ukuqina kunye nokuxhathisa ukubola. Le nkqubo yendabuko, ngelixa indleko-esebenzayo, inezithintelo malunga nokusebenza kakuhle kwemveliso kunye nokuhambelana komgangatho.

Inkqubo yokuvelisa i-silicon carbide crucible ihambele phambili kakhulu, isebenzisa izixhobo zokucinezela isostatic kunye nefomula yesayensi. Itekhnoloji yokucinezela i-Isostatic isebenzisa uxinzelelo olufanayo (ukuya kwi-150 MPa), okubangela ukuxinana okuphezulu kunye nokuhambelana kwi-crucible. Le nkqubo ayiphuculi kuphela amandla omatshini we-crucible, kodwa iphakamisa kakhulu ukuchasana kwayo nokutshatyalaliswa kwe-thermal kunye ne-corrosion.

Ukwahluka kwentsebenzo
Ngokubhekiselele ekusebenzeni, kukho ukungafani okukhulu phakathi kwee-graphite crucibles kunye ne-silicon carbide crucibles. Iicrucibles ze-graphite zine-13 kA/cm², ngelixa ii-silicon carbide crucibles zine-1.7 ukuya kwi-26 kA/mm². Ubomi benkonzo ye-graphite crucibles ngokuqhelekileyo ngamaxesha angama-3-5 i-silicon carbide crucibles, eyona nto ibangelwa amandla aphezulu kunye nokuxhatshazwa kwe-corrosion ye-silicon carbide crucibles.

Ukongeza, ukuhluka kweqondo lokushisa phakathi kwangaphakathi nangaphandle kwe-graphite crucible malunga nama-degrees angama-35, ngelixa ukuhluka kweqondo lokushisa kwe-silicon carbide crucible yi-2-5 degrees kuphela, okwenza i-silicon carbide crucible ibe phezulu ngakumbi ngokubhekiselele kulawulo lobushushu kunye ne-thermal. uzinzo. Ukumelana ne-asidi kunye ne-alkali kunye nokumelana nokubola kwe-silicon carbide crucibles nazo ziphezulu kakhulu kunezo ze-graphite crucibles, eziphucula kakhulu ukusebenza kakuhle kwamandla kunye nokugcina amandla angama-50% kune-graphite crucibles.

umahluko kwixabiso
Ngenxa yokungafani kwezixhobo kunye neenkqubo zokuvelisa, i-graphite crucibles kunye ne-silicon carbide crucibles nazo zineentsingiselo ezibalulekileyo zexabiso. Ngokuqhelekileyo, i-silicon carbide crucibles ixabisa ngokuphindwe kathathu kune-graphite crucibles. Lo mahluko wexabiso ubonisa inzuzo ebalulekileyo ye-silicon carbide crucibles ngokwexabiso lezinto eziphathekayo, inkqubo yokuvelisa kunye nokusebenza.

Isishwankathelo, nangona ii-silicon carbide crucibles zibiza ngaphezulu, ukuqina kwazo okuphezulu, ukuxhathisa ukubola, kunye nokusebenza kakuhle kwamandla kubenza babe lukhetho olungabizi kakhulu kwizicelo ezininzi ezifunayo. I-graphite crucibles ihlala isetyenziswa ngokubanzi kwizicelo ezininzi zemveli ngenxa yeendleko zabo eziphantsi kunye neempawu ezilungileyo ezisisiseko. Izibonelelo ezichaphazelekayo kunye nokungalunganga kwezi zimbini ze-crucibles ziqinisekisa ukuba zifanelekile kwiimeko ezahlukeneyo zesicelo.