Ka hoʻohana ʻana i ka α-alumina i kahi houalumina keramika
ʻOiai he nui nā ʻano mea hana seramika hou, hiki ke hoʻokaʻawale ʻia i ʻekolu mau ʻāpana e like me kā lākou hana a me ka hoʻohana ʻana: nā seramika hana (ʻike pū ʻia ʻo electronic ceramics), structural ceramics (i ʻike ʻia ʻo engineering ceramics) a me bioceramics. Wahi a nā ʻāpana ʻokoʻa i hoʻohana ʻia, hiki ke hoʻokaʻawale ʻia i nā seramika oxide, nitride ceramics, boride ceramics, carbide ceramics a me metal ceramics. I waena o lākou, he mea koʻikoʻi nā alumina ceramics, a ʻo kāna mea maka he α-alumina pauka o nā kikoʻī like ʻole.
Hoʻohana nui ʻia ka α-alumina i ka hana ʻana i nā ʻano mea seramika hou ma muli o kona ikaika kiʻekiʻe, kiʻekiʻe paʻakikī, kiʻekiʻe kiʻekiʻe ka pale ʻana i ka wela, ka pale lole a me nā mea maikaʻi ʻē aʻe. ʻAʻole wale ia he pauka maka no nā alumina seramika holomua e like me nā substrates kaapuni i hoʻohui ʻia, nā pōhaku kūlohelohe, nā mea ʻoki ʻoki, nā iwi artificial, a me nā mea ʻē aʻe, akā hiki ke hoʻohana ʻia ma ke ʻano he mea lawe phosphor, nā mea refractory kiʻekiʻe, nā mea wili kūikawā, a me nā mea ʻē aʻe.
Ka hoʻohana ʻana i ka α-alumina i nā seramika hana
ʻO nā seramika hanae nānā i nā seramika kiʻekiʻe e hoʻohana ana i kā lākou uila, magnetic, acoustic, optical, thermal a me nā waiwai ʻē aʻe a i ʻole kā lākou hopena hoʻohui e hoʻokō i kekahi hana. Loaʻa iā lākou nā waiwai uila e like me ka insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity a me superconductivity, no laila he nui nā hana a me nā noi ākea loa. I kēia manawa, ʻo nā mea nui i hoʻohana pono ʻia ma ke ʻano nui he insulating ceramics no nā substrates circuit circuit a me ka hoʻopili ʻana, automotive spark plug insulating ceramics, capacitor dielectric ceramics i hoʻohana nui ʻia i nā televise a me nā mea hoʻopaʻa wikiō, piezoelectric ceramics me nā hoʻohana he nui a me nā seramika koʻikoʻi no nā ʻano like ʻole. Eia kekahi, hoʻohana ʻia lākou no nā ipu kukui sodium kiʻekiʻe.
1. ʻO nā seramika hoʻomākaʻikaʻi
ʻO ka Spark plug insulating ceramics ka mea hoʻohana nui loa o nā seramika i nā ʻenekini. No ka mea ʻoi aku ka maikaʻi o ka alumina i ka uila uila, ka ikaika mechanical kiʻekiʻe, ke kūpaʻa kiʻekiʻe a me ke kūpaʻa haʻalulu wela, hoʻohana nui ʻia nā alumina insulating spark plugs ma ka honua. ʻO nā koi no ka α-alumina no nā pahu kukui he mau micropowders haʻahaʻa haʻahaʻa haʻahaʻa α-alumina, kahi i loaʻa ai ka sodium oxide ≤0.05% a ʻo ka nui o ka nui o ka ʻāpana he 325 mesh.
2. Nā substrate kaapuni i hoʻohui ʻia a me nā mea hoʻopili
ʻOi aku ka maikaʻi o nā seramika i hoʻohana ʻia e like me nā mea substrate a me nā mea hoʻopihapiha ma mua o nā plastics i nā ʻano aʻe: ke kūpaʻa insulation kiʻekiʻe, ke kūpaʻa ʻana i ka corrosion kemika kiʻekiʻe, ka sila kiʻekiʻe, ka pale ʻana i ka wai, ʻaʻohe reactivity, a ʻaʻohe pollution i ka ultra-pure semiconductor silicon. ʻO nā waiwai o ka α-alumina i koi ʻia no nā substrates kaapuni i hoʻohui ʻia a me nā mea hoʻopihapiha: ʻo ka helu hoʻonui wela 7.0 × 10-6 / ℃, conductivity thermal 20-30W / K·m (ke wela lumi), dielectric mau 9-12 (IMHz), dielectric nalowale 3~10-4 (IMHz), ka nui resistivity>1012-10cm14 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 hoʻopihapiha:
Ke piʻi aʻe ka hana wela o ka puʻupuʻu, koi ʻia ka conductivity thermal kiʻekiʻe.
Me ka wikiwiki kiʻekiʻe o ka mea hoʻopili helu, koi ʻia kahi mau dielectric haʻahaʻa.
Pono e pili ka koena hoʻonui wela i ka silika. Hoʻonoho kēia i nā koi kiʻekiʻe ma luna o ka α-alumina, ʻo ia hoʻi, hoʻomohala i ke ala o ka maʻemaʻe kiʻekiʻe a me ka maikaʻi.
3. Kiʻekiʻe kiʻekiʻe sodium kukui-emitting kukui
ʻO nā seramika maikaʻii hana ʻia me ka alumina ultrafine maʻemaʻe kiʻekiʻe e like me nā mea maka i nā ʻano o ke kūpaʻa wela kiʻekiʻe, ka pale ʻana i ka corrosion, ka insulation maikaʻi, ka ikaika kiʻekiʻe, a me nā mea ʻē aʻe, a he mea maikaʻi loa ka ceramic optical. ʻO ka polycrystalline māmā i hana ʻia me ka alumina maʻemaʻe kiʻekiʻe me ka liʻiliʻi o ka magnesium oxide, iridium oxide a iridium oxide additives, a i hana ʻia e ka lewa a me ka hoʻoheheʻe ʻana i ka wela, hiki ke pale i ka ʻino o ka sodium vapor kiʻekiʻe a hiki ke hoʻohana ʻia e like me ke kiʻekiʻe-pressure sodium light-emitting kukui me ke kiʻekiʻe o ke kukui.
Ka hoʻohana ʻana i ka α-alumina i nā seramika
E like me nā mea biomedical inorganic, ʻaʻohe hopena ʻino o nā mea bioceramic i hoʻohālikelike ʻia me nā mea metala a me nā mea polymer, a loaʻa ka biocompatibility maikaʻi a me ke kūpaʻa corrosion me nā ʻiʻo biological. Ua hoʻonui nui ʻia lākou e nā kānaka. Ua ulu ka noiʻi a me ka noiʻi lapaʻau o nā mea bioceramic mai ka pani pōkole a me ka hoʻopiha ʻana i ka implantation mau a paʻa, a mai nā mea inert biologically i nā mea hana biologically a me nā mea hoʻohui multiphase.
I nā makahiki i hala iho nei, porousalumina keramikaUa hoʻohana ʻia e hana i nā hui iwi iwi, nā kuli kuli, nā poʻo femoral artificial, nā iwi hana ʻē aʻe, nā aʻa niho kūlohelohe, nā iwi hoʻoponopono iwi, a me ka hoʻoponopono ʻana i ka corneal ma muli o ko lākou kūpaʻa ʻana i ke kino, ke kūpaʻa ʻana, ke kūpaʻa wela kiʻekiʻe, a me nā waiwai thermoelectric. ʻO ke ala no ka hoʻomalu ʻana i ka nui o ka pore i ka wā o ka hoʻomākaukau ʻana i nā seramika alumina porous ʻo ia ka hui ʻana i nā ʻāpana alumina o nā ʻāpana ʻokoʻa like ʻole, impregnate foam, a hoʻomaloʻo i nā ʻāpana. Hiki ke anodized nā papa alumini e hana i nā pores ʻano ʻano microporous nano-scale.