Kuwona zomwe zili ndi porous silicon carbide ceramics

Wapadera zimatha porous silicon carbide ceramicsmakamaka chifukwa cha mapangidwe ake apadera a porous, omwe ali ndi porosity, kukula kwa pore ndi kugawa, ndi mawonekedwe a mabowo. Chifukwa chake, ndikofunikira kuwongolera porosity yake, kukula kwa pore ndi kugawa kwake, ndi mawonekedwe a pore kudzera munjira yokonzekera kuti mupeze mawonekedwe omwe mukufuna. Kotero njira yake yokonzekera yakhala cholinga cha kafukufuku.

Katundu wa porous SiC ceramics

1.Pore ​​katundu

①Porosity

Porosity ndi kuchuluka kwa voliyumu yomwe imakhala ndi ma pores muzinthu zokhala ndi porous mpaka kuchuluka kwazinthu zonse zaporous (kuphatikiza ma pores otseguka, ma pores otseguka ndi ma pores otsekedwa amitundu itatu). Kafukufuku akuwonetsa kuti magwiridwe antchito a porous amadalira makamaka porosity.

② Pore morphology

Pore ​​morphology imatanthawuza kapangidwe ka pores mu porous ceramics. Pamene pores ndi equiaxed pores, zonse ntchito zakuthupi isotropic; koma pamene pores ali milozo kapena lathyathyathya, monga mwa carbonization wa nkhuni wokonzedwa ndi silicon reaction sintering porous SiC ceramics, kamangidwe ka pore ndi mbali ina.

③Pore ​​awiri ndi kugawa

Pore ​​m'mimba mwake zosakwana 2nm kwa zipangizo microporous, pore kukula pakati 2 ~ 50nm kwa zipangizo mesoporous, kukula kuposa 20nm kwa macroporous zipangizo. Ndi kukula kwa pore ndi kugawidwa kwa zotsatira zazikulu za ntchito, kuphatikizapo permeability, permeability rate ndi kusefera.

2.Zimango katundu

Porous SiC ceramiczipangizo ndi Chimaona ndi katundu mawotchi nthawi zambiri yodziwika ndi kupinda kapena psinjika mphamvu. Porosity ndi njira yokonzekera imakhudza kwambiri makina a porous SiC ceramics.

3.Thermal Conductivity

Porosity ndi pore morphology zimakhudza kwambiri matenthedwe amtundu wa porous ceramics. Kwa ma porous ceramics okhala ndi pore yogawa pore, kutentha kwa matenthedwe kumachepa pang'onopang'ono pamene kuchuluka kwa pore kumawonjezeka. Komabe, chifukwa cha pore morphology ya porous ceramic zipangizo zokonzedwa ndi njira zosiyanasiyana, pali kusiyana kwakukulu, kotero kutentha kutengerapo ndondomeko ndi lofanana zosiyanasiyana ndi zovuta.

Porous SiC ceramicsali ndi zinthu zabwino kwambiri za thupi la SiC palokha, monga kachulukidwe kachulukidwe kachulukidwe, malo apamwamba kwambiri, kuuma kwakukulu, kukana kwa dzimbiri, kukana kutentha kwambiri, kukhathamiritsa kwamafuta ambiri, kutsika kwamphamvu kwamafuta, komanso kukana kugwedezeka kwamafuta, pamwamba pa kukhutitsidwa ndi porous chikhalidwe cha ceramics.