Ka hoʻohana ʻana o ka α-alumina i loko o nā mea hounā keramika alumina
ʻOiai he nui nā ʻano mea keramika hou, hiki ke hoʻokaʻawale ʻia i ʻekolu mau ʻāpana e like me kā lākou mau hana a me nā hoʻohana: nā keramika hana (ʻike ʻia hoʻi he keramika uila), nā keramika kūkulu (ʻike ʻia hoʻi he keramika ʻenekinia) a me nā bioceramics. Wahi a nā ʻāpana mea maka like ʻole i hoʻohana ʻia, hiki ke hoʻokaʻawale ʻia i nā keramika oxide, nā keramika nitride, nā keramika boride, nā keramika carbide a me nā keramika metala. I waena o lākou, he mea nui loa nā keramika alumina, a ʻo kāna mea maka he pauka α-alumina o nā kikoʻī like ʻole.
Hoʻohana nui ʻia ka α-alumina i ka hana ʻana o nā mea keramika hou like ʻole ma muli o kona ikaika kiʻekiʻe, paʻakikī kiʻekiʻe, kūpaʻa wela kiʻekiʻe, kūpaʻa ʻaʻahu a me nā waiwai maikaʻi ʻē aʻe. ʻAʻole wale ia he mea pauka maka no nā keramika alumina holomua e like me nā substrates kaapuni hoʻohui, nā pōhaku hana, nā mea ʻoki, nā iwi hana, a pēlā aku, akā hiki ke hoʻohana ʻia ma ke ʻano he mea lawe phosphor, nā mea refractory holomua, nā mea wili kūikawā, a pēlā aku. Me ka hoʻomohala ʻana o ka ʻepekema a me ka ʻenehana hou, ke ulu wikiwiki nei ke kahua noi o α-alumina, a ke piʻi nei hoʻi ke koi o ka mākeke, a he ākea loa kona mau manaʻolana.
Ka hoʻohana ʻana o ka α-alumina i nā keramika hana
Nā keramika hanae pili ana i nā keramika holomua e hoʻohana ana i kā lākou mau waiwai uila, magnetic, acoustic, optical, thermal a me nā waiwai ʻē aʻe a i ʻole ko lākou hopena hoʻopili e hoʻokō i kahi hana. Loaʻa iā lākou nā waiwai uila he nui e like me ka insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity a me superconductivity, no laila he nui kā lākou mau hana a me nā noi ākea loa. I kēia manawa, ʻo nā mea nui i hoʻokomo ʻia i ka hoʻohana pono ʻana ma kahi pae nui, ʻo ia nā keramika insulating no nā substrates circuit integrated a me ka packaging, nā keramika insulating plug automotive, nā keramika dielectric capacitor i hoʻohana nui ʻia i nā kīwī a me nā mea hoʻopaʻa wikiō, nā keramika piezoelectric me nā hoʻohana he nui a me nā keramika koʻikoʻi no nā sensor like ʻole. Eia kekahi, hoʻohana ʻia lākou no nā paipu hoʻomālamalama kukui sodium kiʻekiʻe.
1. Nā keramika hoʻokaʻawale ʻana i ka plug uila
ʻO nā keramika hoʻokaʻawale ʻana i nā plug uila wale nō ka hoʻohana nui ʻana o nā keramika i nā mīkini. No ka mea he maikaʻi loa ka insulation uila o ka alumina, ka ikaika mechanical kiʻekiʻe, ke kū'ē ʻana i ke kaomi kiʻekiʻe a me ke kū'ē ʻana i ka haʻalulu wela, hoʻohana nui ʻia nā plug uila hoʻokaʻawale alumina ma ka honua. ʻO nā koi no ka α-alumina no nā plug uila he mau micropowders α-alumina haʻahaʻa-sodium maʻamau, kahi o ka nui o ka sodium oxide he ≤0.05% a ʻo ka nui o ka ʻāpana awelika he 325 mesh.
2. Nā substrates kaapuni hoʻohui a me nā mea hoʻopili
ʻOi aku ka maikaʻi o nā keramika i hoʻohana ʻia ma ke ʻano he mau mea substrate a me nā mea hoʻopili ma mua o nā plastics ma nā ʻano aʻe: ke kūpaʻa kiʻekiʻe o ka insulation, ke kūpaʻa kiʻekiʻe o ka corrosion kemika, ke sila kiʻekiʻe, ka pale ʻana i ka makū, ʻaʻohe reactivity, a ʻaʻohe haumia i ka silicon semiconductor ultra-pure. ʻO nā waiwai o ka α-alumina e pono ai no nā substrates kaapuni hoʻohuihui a me nā mea hoʻopili: ka coefficient hoʻonui wela 7.0 × 10-6 / ℃, ka conductivity wela 20-30W / K · m (mahana lumi), dielectric constant 9-12 (IMHz), dielectric loss 3 ~ 10-4 (IMHz), resistivity volume> 1012-1014Ω · cm (mahana lumi).
Me ka hana kiʻekiʻe a me ka hoʻohui kiʻekiʻe o nā kaapuni i hoʻohui ʻia, ua kau ʻia nā koi koʻikoʻi no nā substrates a me nā mea hoʻopili:
I ka piʻi ʻana o ka hana wela o ka ʻāpana, pono ka conductivity thermal kiʻekiʻe.
Me ka wikiwiki kiʻekiʻe o ka ʻāpana helu, pono ka paʻa dielectric haʻahaʻa.
Pono ke koina hoʻonui wela e kokoke i ka silicon. Hoʻokau kēia i nā koi kiʻekiʻe ma luna o ka α-alumina, ʻo ia hoʻi, ulu ia ma ke ala o ka maʻemaʻe kiʻekiʻe a me ka maikaʻi.
3. Ke kukui hoʻomālamalama sodium kiʻekiʻe-kaomi
Nā keramika maikaʻiHana ʻia me ka alumina ultrafine kiʻekiʻe-maʻemaʻe e like me nā mea maka he mau ʻano o ke kūpaʻa wela kiʻekiʻe, ke kūpaʻa i ka corrosion, ka insulation maikaʻi, ka ikaika kiʻekiʻe, a me nā mea ʻē aʻe, a he mea seramika optical maikaʻi loa. ʻO ka polycrystalline translucent i hana ʻia me ka alumina maʻemaʻe kiʻekiʻe me kahi liʻiliʻi o ka magnesium oxide, iridium oxide a i ʻole nā mea hoʻohui iridium oxide, a hana ʻia e ka sintering lewa a me ka sintering kaomi wela, hiki ke kū i ka corrosion o ka mahu sodium wela kiʻekiʻe a hiki ke hoʻohana ʻia e like me nā kukui hoʻomālamalama sodium kiʻekiʻe me ka pono kukui kiʻekiʻe.
Ka hoʻohana ʻana o ka α-alumina i nā keramika kūkulu
Ma ke ʻano he mau mea biomedical inorganic, ʻaʻohe hopena ʻawaʻawa o nā mea bioceramic i hoʻohālikelike ʻia me nā mea metala a me nā mea polymer, a he biocompatibility maikaʻi a me ke kūpaʻa i ka palaho me nā ʻiʻo olaola. Ua piʻi nui ka mahalo o ka poʻe iā lākou. Ua ulu ka noiʻi a me ka hoʻohana lapaʻau o nā mea bioceramic mai ka hoʻololi pōkole a me ka hoʻopiha ʻana i ka hoʻokomo mau loa a paʻa, a mai nā mea inert olaola a hiki i nā mea hana olaola a me nā mea hui multiphase.
I nā makahiki i hala iho nei, ua ʻike ʻia nā porous.nā keramika aluminaua hoʻohana ʻia e hana i nā hui iwi artificial, nā hui kuli artificial, nā poʻo femoral artificial, nā iwi artificial ʻē aʻe, nā aʻa niho artificial, nā wili hoʻopaʻa iwi, a me nā hoʻoponopono corneal ma muli o ko lākou kūpaʻa kemika i ka palaho, ke kūpaʻa ʻana i ka ʻaʻahu, ke kūpaʻa maikaʻi o ka mahana kiʻekiʻe, a me nā waiwai thermoelectric. ʻO ke ʻano no ka kaohi ʻana i ka nui o ka pore i ka wā o ka hoʻomākaukau ʻana i nā keramika alumina porous, ʻo ia ke kāwili ʻana i nā ʻāpana alumina o nā nui ʻāpana like ʻole, ka hoʻokomo ʻana i ka foam, a me ka hoʻomaloʻo ʻana i nā ʻāpana. Hiki ke anodized ʻia nā papa alumini e hana i nā pores ʻano channel microporous nano-scale directional.