He aha ka mea hana seramika?

ʻO nā substrates seramika ke kikowaena o ka kaohi ʻana i nā hoʻokuʻu kelepona mai ka hoʻomaka ʻana o ka ʻenehana i ka hoʻomaka ʻana o nā makahiki 1970 i ka wā i hoʻomohala ai ʻo Corning i ka cordierite synthetic a me ka make no ka hoʻopuka ʻana o ka meli keramika. Ua piha nā substrates meli me nā tausani o nā kahawai liʻiliʻi, like i wehe ʻia ma kēlā me kēia ʻaoʻao, e ʻae ana i ka hoʻopau ʻana o ke kaʻa e kahe. Hāʻawi kēia mau kahawai i kahi ʻili nui o loko e kākoʻo i ka hana catalytic. Ke like ka nui o ka substrate me kahi kini soda, ʻo kona ʻili o loko (me ka ʻili kiʻekiʻe o ka washcoat) he ʻili e like me ka nui o ke kahua pôpeku ʻAmelika.

Hiki i kēia mau substrates ke kū i nā mahana kiʻekiʻe >1100°C (2000°F) a he kūpaʻa loa i ka haʻalulu wela (i ola ai lākou i ka wela wikiwiki i nā kakahiaka anuanu). He mea maʻalahi loa kēia mau substrates a hiki ke ʻae i nā ʻano hana catalyst like ʻole e hoʻopau i ka haumia mai ka gasoline, diesel, kinoea kūlohelohe, hydrogen a me nā wahie ʻē aʻe.

Ua uhi ʻia ka substrate i hoʻopau ʻia me ka hui pū ʻana o nā mea catalytic kūpono e hoʻolilo iā ia i hale hana kemika liʻiliʻi a hiki ke mālama pono ʻia nā nui o ka hoʻopau. I nā mahana kiʻekiʻe o kahi ʻenekini hana, hui nā kinoea hoʻopau e like me nā nitrogen oxides a me ke kalapona monoxide me ka catalyst a hoʻololi ʻia i ka nitrogen a me ka wai ʻino ʻole a me ke kalapona dioxide ʻino ʻole.

ʻO nā substrates keramika kalepa mua he haʻahaʻa ka nui o nā cell (ma kahi o 200 mau cell/in2) me nā paia mānoanoa (ma kahi o 12 mil a i ʻole 0.012” a i ʻole 0.3 mm) me ka nui o ka substrate ma kahi o ʻehā manawa o ka neʻe ʻana o ka ʻenekini (ʻo ia hoʻi, ka nui o ka cylinder o ka ʻenekini). I ka holomua ʻana o nā mea hana a me ka ʻenehana hana, ua hiki ke kiʻekiʻe nā densities cell, nā paia lahilahi, a me nā porosities kiʻekiʻe.

I loko o ke kaʻa ʻaila a i ʻole ka sedan hybrid maʻamau o ʻAmelika Hui Pū ʻIa i kēia lā, aia ʻelua a ʻekolu paha mau substrates e hana ana e hoʻokō i nā kūlana hoʻokuʻu kinoea paʻa o ʻAmelika Hui Pū ʻIa. Ma waho koke o ka ʻenekini, ʻo nā substrate pili kokoke me ka nui o nā cell density e hāʻawi i ka nui o ka ʻili geometric e ʻae i ka catalyst e hana i nā hoʻololi kinoea mua. Ma ke kūlana ma lalo o ka papahele aia maʻamau kahi substrate haʻahaʻa o nā cell density e kōkua i ka hoʻomaʻemaʻe ʻana i nā hoʻokuʻu hope loa.