Kushandiswa kweα-alumina muzvinhu zvitsvazviumbwa zvesimbi zvealumina
Kunyangwe paine mhando dzakawanda dzezvinhu zvitsva zveceramic, zvinogona kukamurwa kuita zvikamu zvitatu zvichienderana nemabasa azvo uye mashandisirwo azvo: functional ceramics (inozivikanwawo se electronic ceramics), structural ceramics (inozivikanwawo se engineering ceramics) uye bioceramics. Zvichienderana nezvikamu zvakasiyana zve raw material zvinoshandiswa, zvinogona kukamurwa kuita oxide ceramics, nitride ceramics, boride ceramics, carbide ceramics uye metal ceramics. Pakati pazvo, alumina ceramics dzakakosha zvikuru, uye raw material yayo i α-alumina powder ine specifications dzakasiyana.
α-alumina inoshandiswa zvakanyanya mukugadzira zvinhu zvitsva zvakasiyana-siyana zveceramic nekuda kwesimba rayo guru, kuomarara kwayo, kuramba kupisa kwakanyanya, kuramba kupfeka uye zvimwe zvinhu zvakanaka. Haisi chete chinhu cheupfu chekugadzira zvinhu zvepamusoro zve alumina ceramics zvakaita se substrates dzakasanganiswa dzedunhu, matombo ekugadzira, maturusi ekucheka, mapfupa ekugadzira, nezvimwewo, asiwo inogona kushandiswa senzira yekutakura phosphor, zvinhu zvepamusoro zvinoramba kushanda, zvinhu zvekukuya zvakakosha, nezvimwewo. Nekuvandudzwa kwesainzi yemazuva ano netekinoroji, nzvimbo yekushandisa ye α-alumina iri kukura nekukurumidza, uye kudiwa kwemusika kuri kuwedzerawo, uye mikana yayo yakakura kwazvo.
Kushandiswa kweα-alumina muzvigadziko zvesimbi zvinoshanda
Zviumbwa zvesimbi zvinoshandazvinoreva zviumbwa zvesimbi zvemhando yepamusoro zvinoshandisa simba razvo remagetsi, remagineti, remanzwi, remagetsi, rekupisa uye zvimwe zvinhu kana kuti zvinobatanidza kuti zvibudirire. Zvine simba rakawanda remagetsi rakadai sekudzivirira kupisa, remadielectric, remapiezoelectric, remaotomatiki, remasekonzi, remaion conductivity uye remasuperconductivity, saka zvine mabasa akawanda uye mashandisirwo akasiyana-siyana. Parizvino, zvikuru zvakashandiswa zvakanyanya ndezvizvi: zviumbwa zvesimbi zvesimbi zvemaintegrated circuit substrates uye ma packaging, zviumbwa zvesimbi zvesimbi zvemaautomotive spark plug, zviumbwa zvesimbi zvesimbi zve capacitor zvinoshandiswa zvakanyanya mumaterevhizheni nemavhidhiyo rekurekodha, zviumbwa zvesimbi zve piezoelectric zvine mashandisirwo akasiyana-siyana uye zviumbwa zvesimbi zvinonzwa simba zvema sensor akasiyana-siyana. Pamusoro pezvo, zvinoshandiswawo pamachubhu emwenje we sodium ane simba rakawanda.
1. Zviumbwa zvesimbi zvinodzivirira mapurasitiki
Zvigadzirwa zvesimbi zvinodzivirira kupisa (spark plug) pari zvino ndizvo chete zvinoshandiswa zvakanyanya muzviumbwa zvesimbi muinjini. Nekuti alumina ine insulation yakanaka yemagetsi, simba remagetsi rakawanda, resistance yakanyanya uye resistance yakanyanya kupisa, zviumbwa zvesimbi zvinodzivirira kupisa (alumina insulation spark plugs) zvinoshandiswa zvakanyanya pasi rose. Zvinodiwa zve α-alumina zvezviumbwa zvesimbi i low-sodium α-alumina micropowders, umo huwandu hwe sodium oxide huri ≤0.05% uye avhareji yehukuru hwezviumbwa i 325 mesh.
2. Zvigadziko zvedunhu zvakabatanidzwa nezvinhu zvekurongedza
Zvidimbu zvinoshandiswa sezvinhu zvepasi uye zvinhu zvekurongedza zvakanakisa kupfuura mapurasitiki muzvinhu zvinotevera: kuramba kudziya zvakanyanya, kuramba ngura zvakanyanya, kuvhara zvakanyanya, kudzivirira kupinda kwehunyoro, kusaita reactivity, uye kusasvibiswa kwe ultra-pure semiconductor silicon. Hunhu hwe α-alumina hunodiwa kune integrated circuit substrates nezvinhu zvekurongedza ndei: thermal expansion coefficient 7.0×10-6/℃, thermal conductivity 20-30W/K·m (tembiricha yekamuri), dielectric constant 9-12 (IMHz), dielectric loss 3~10-4 (IMHz), volume resistivity>1012-1014Ω·cm (tembiricha yekamuri).
Nekushanda kwepamusoro uye kubatanidzwa kwakanyanya kwemasekete akabatanidzwa, zvinodiwa zvakanyanya zvinoiswa pamberi pe substrates nezvinhu zvekurongedza:
Sezvo kupiswa kwechip kuchikwira, kunodiwa kuti kupisa kwacho kuwedzere.
Nekumhanya kwakanyanya kwechinhu chekuverenga, chinhu che dielectric chakaderera chinodiwa.
Kuwanda kwekupisa kunodiwa kuti ive pedyo nesilicon. Izvi zvinoisa zvinodiwa zvakanyanya paα-alumina, kureva kuti, inokura ichienda pakuchena kwakanyanya uye kupfava.
3. Rambi rinoburitsa chiedza chesodium rine simba guru
Zviumbwa zvakanaka zvedongoYakagadzirwa nealumina yemhando yepamusoro-soro sezvinhu zvakagadzirwa zvine hunhu hwekudzivirira kupisa kwakanyanya, kudzivirira ngura, kudzivirira kupisa kwakanaka, simba rakawanda, nezvimwewo, uye ipurasitiki yakanaka kwazvo. Yakagadzirwa nepolycrystalline yakajeka yakagadzirwa nealumina yemhando yepamusoro-soro ine huwandu hushoma hwemagnesium oxide, iridium oxide kana iridium oxide additives, uye yakagadzirwa nemhepo inodziya uye inopisa, inogona kutsungirira ngura yemhepo inopisa-soro uye inogona kushandiswa semwenje inoburitsa mwenje yesodium ine simba rakawanda remwenje.
Kushandiswa kweα-alumina muzvigadzirwa zvesimbi
Sezvinhu zvisingasanganisike zvekurapa, zvinhu zvebioceramic hazvina migumisiro ine chepfu zvichienzaniswa nezvinhu zvesimbi nezvinhu zvepolymer, uye zvine hukama hwakanaka uye zvinodzivirira ngura nematishu ezvehupenyu. Zvave zvichikosheswa nevanhu zvakanyanya. Tsvagiridzo nekushandiswa kwekiriniki kwezvinhu zvebioceramic zvakabva pakutsiva kwenguva pfupi nekuzadza kusvika pakuiswa zvachose uye kwakasimba, uye kubva pazvinhu zvisina simba zvehupenyu kusvika kune zvinhu zvinoshanda zvehupenyu uye zvinhu zvakawanda zvakasanganiswa.
Mumakore achangopfuura,zviumbwa zvesimbi zvealuminazvakashandiswa kugadzira majoini emapfupa ekugadzira, majoini emabvi ekugadzira, misoro yefemoral yekugadzira, mamwe mapfupa ekugadzira, midzi yemazino ekugadzira, screws dzekugadzirisa mapfupa, uye kugadziriswa kwe cornea nekuda kwekusagadzikana kwemakemikari, kusapera, kugadzikana kwakanaka kwekupisa kwepamusoro, uye hunhu hwe thermoelectric. Nzira yekudzora saizi yemaburi panguva yekugadzirira zvidimbu zve alumina zvine maburi ndeyekusanganisa zvidimbu zve alumina zvehukuru hwakasiyana, kuisirwa furo, uye kupfapfaidza zvidimbu. Maplate ealuminium anogonawo kuomeswa kuti agadzire maburi emhando ye nano-scale microporous channel.