Kushandiswa kwea-alumina mune itsvaalumina ceramics
Kunyangwe paine akawanda akawanda emhando yezvigadzirwa zvitsva zveceramic, zvinogona kukamurwa kuita zvikamu zvitatu zvinoenderana nemabasa uye mashandisiro azvo: dhakamiki rinoshanda (inozivikanwawo semagetsi ekeramic), zviumbwa zvekeramics (inozivikanwawo seinjiniya ceramics) uye bioceramics. Zvinoenderana neyakasiyana-siyana mbishi zvinhu zvinoshandiswa, zvinogona kukamurwa kuita oxide ceramics, nitride ceramics, boride ceramics, carbide ceramics uye simbi ceramics. Pakati pazvo, alumina ceramics yakakosha zvikuru, uye iyo mbishi ndeye α-alumina poda yezvakasiyana zvakatemwa.
α-alumina inoshandiswa zvakanyanya mukugadzirwa kwezvinhu zvitsva zvakasiyana-siyana zveceramic nekuda kwesimba rayo guru, kuoma kwepamusoro, kukwirira kwekushisa kwekushisa, kusapfeka uye zvimwe zvakanaka. Haisi chete hupfu mbishi zvinhu zvepamberi alumina ceramics yakadai seyakasanganiswa redunhu substrates, matombo anokosha, maturusi ekucheka, mapfupa ekugadzira, nezvimwewo, asi zvakare inogona kushandiswa senge phosphor inotakura, yepamusoro refractory zvinhu, yakakosha kugaya zvinhu, etc. Nekuvandudzwa kwesainzi yemazuva ano uye tekinoroji, nzvimbo yekushandisa yealpha-alumina, musika unowedzera uye tarisiro yayo iri kuwedzera nekukurumidza.
Kushandiswa kwea-alumina mune inoshanda ceramics
Inoshanda Ceramicstarisa kumakeramiki epamberi anoshandisa magetsi, magineti, acoustic, optical, thermal uye zvimwe zvivakwa kana kubatanidza kwavo kuita rimwe basa. Ivo vane akawanda emagetsi emagetsi senge insulation, dielectric, piezoelectric, thermoelectric, semiconductor, ion conductivity uye superconductivity, saka vane mabasa mazhinji uye zvakapamhama application. Parizvino, iwo makuru akaiswa mukushandiswa kunoshanda pamwero mukuru ari insulating ceramics for integrated circuit substrates and packaging, mota spark plug insulating ceramics, capacitor dielectric ceramics inoshandiswa zvakanyanya mumaterevhizheni uye vhidhiyo rekodhi, piezoelectric ceramics ine akawanda mashandisiro uye inonzwisisika ceramics kune akasiyana masensa. Mukuwedzera, ivo vanoshandiswawo kune yakakwirira-kumanikidza sodium mwenje-emitting machubhu.
1. Spark plug insulating ceramics
Spark plug insulating ceramics pari zvino ndiyo chete yakakura kushandisa ceramics mumainjini. Nekuti alumina ine yakanakisa kuisirwa kwemagetsi, yakakwira mechani simba, yakakwira kumanikidza kuramba uye kupisa kwekuvhunduka, alumina insulating spark plugs anoshandiswa zvakanyanya munyika. Zvinodiwa zve α-alumina ye spark plugs zvakajairwa pasi-sodium α-alumina micropowders, umo sodium oxide yemukati iri ≤0.05% uye avhareji saizi i325 mesh.
2. Integrated circuit substrates uye kurongedza zvinhu
Ceramics inoshandiswa se substrate zvinhu uye zvekurongedza zvinhu zvakakwirira kune mapurasitiki mune zvinotevera zvinhu: yakakwirira insulation kuramba, yakakwirira kemikari corrosion resistance, high sealing, mwando kudzivirira kupinda, hapana reactivity, uye hapana kusvibiswa kune Ultra-pure semiconductor silicon. Zvinhu zve α-alumina inodiwa pakubatanidza dunhu substrates uye kurongedza zvinhu ndezvi: thermal kuwedzera coefficient 7.0 × 10-6 / ℃, thermal conductivity 20-30W/K · m (tembiricha yekamuri), dielectric inoramba iripo 9-12 (IMHz), dielectric kurasikirwa 3 ~ 10-4 (> 10 MHz , vhoriyamu resistance · 10 MHz), vhoriyamu resistance · 1 MHz 2 MHz .
Nekuita kwepamusoro uye kubatanidzwa kwepamusoro kwemaseketi akabatanidzwa, zvinodikanwa zvakanyanya zvinoiswa mberi kune substrates uye zvekurongedza zvinhu:
Sezvo chizvarwa chekupisa chechip chinowedzera, yakakwirira yekupisa conductivity inodiwa.
Nekumhanya kwakanyanya kweiyo computing element, yakaderera dielectric inokwana inodiwa.
Iyo yekupisa yekuwedzera coefficient inodiwa kuti ive pedyo nesilicon. Izvi zvinoisa zvinodiwa zvepamusoro pa α-alumina, kureva kuti, inokura munzira yekuchena kwepamusoro uye kunaka.
3. High-pressure sodium light-emitting rambi
Ceramics yakanakayakagadzirwa nepamusoro-kuchena ultrafine alumina seyakagadzirwa ine hunhu hwekupisa tembiricha kuramba, corrosion resistance, good insulation, high simba, etc., uye yakanakisa optical ceramic material. Transparent polycrystalline yakagadzirwa nehigh-purity alumina ine shoma shoma yemagnesium oxide, iridium oxide kana iridium oxide additives, uye yakagadzirwa neatmosphere sintering uye inopisa kudzvanya sintering, inogona kumira nekuora kweyepamusoro-tembiricha sodium mhute uye inogona kushandiswa seyakanyanya-kumanikidza sodium mwenje-emitting marambi ane yakanyanya kupenya.
Kushandiswa kwea-alumina mune zvimiro zvekeramics
Sezvinhu zvisingaverengeki zvebiomedical, bioceramic zvinhu hazvina chepfu mhedzisiro kana zvichienzaniswa nesimbi zvinhu uye polymer zvinhu, uye zvine yakanaka biocompatibility uye corrosion kuramba nebiological tissues. Vave vachiwedzera kukosheswa nevanhu. Tsvagiridzo uye kushandiswa kwekiriniki kwezvinhu zvebioceramic zvakagadzira kubva pakutsiva kwenguva pfupi uye kuzadza kusvika kune zvachose uye kwakasimba kudyara, uye kubva kune biological inert zvinhu kusvika kune biologically inoshanda zvinhu uye multiphase inoumbwa zvinhu.
Mumakore achangopfuura, porousalumina ceramicsakashandiswa kugadzira skeletal joints, artificial knee joints, artificial femoral heads, mamwe mapfupa ekugadzira, midzi yemazino ekugadzira, bhonzo fixation screws, uye corneal kugadziriswa nekuda kwemakemikari ayo ekuora, kusapfeka, kunaka kwekushisa kwepamusoro, uye thermoelectric properties. Iyo nzira yekudzora saizi yepore panguva yekugadzira porous alumina ceramics ndeyekusanganisa alumina zvimedu zveakasiyana particle saizi, furo impregnate, uye kupfapfaidza kuomesa zvimedu. Aluminium mahwendefa anogona zvakare anodized kugadzira inotungamira nano-scale microporous channel-type pores.