Alpha-alumina ine makemikari akasimba, inodzivirira ngura, kuomarara kwakanyanya, ine hunyanzvi hwakanaka hwekudzivirira kupisa, inonyunguduka zvakanyanya uye yakasimba, uye inoshandiswa muminda yakasiyana.
Kushandiswa kweupfu hweα-alumina muzviumbwa zvedongo
Microcrystalline alumina ceramics rudzi rutsva rwezvinhu zveceramic zvine chimiro chakafanana uye chakasimba uye saizi ye nano kana sub-micron grain. Ine zvakanakira simba remuchina rakakwirira, kuramba kupfeka, kuramba ngura, kuramba oxidation, kuwedzera kunogadziriswa uye kugadzikana kwakanaka kwekupisa. Chinhu chikuru ndechekuti kristalo yekutanga idiki. Saka, mamiriro ehunyanzvi akakosha ekugadzirira microcrystalline alumina ceramics ndeyekugadzira upfu hwe α-Al2O3 nekristaro diki yepakutanga uye basa rakawanda rekupisa. Upfu uhwu hwe α-Al2O3 hunogona kuva muviri weceramic wakakora pakupisa kwakaderera kwekupisa.
Kushandiswa kweupfu hweα-alumina muzvinhu zvinoramba kushanda
Upfu hweα-Al2O3 hwakasiyana muzvinhu zvinoramba simba zvichienderana nekushandiswa, uye zvinodiwa nehupfu zvakasiyanawo. Semuenzaniso, kana uchida kukurumidzisa kuwedzera simba kwezvinhu zvinoramba simba, nano-alumina ndiyo sarudzo yakanakisisa; kana uchida kugadzira zvinhu zvinoramba simba, unoda hupfu hweα-Al2O3 hune tsanga dzakakora, shrinkage diki, uye resistance yakasimba yekuchinja. Makristallite akaumbwa neflake kana plate ari nani; asi kana iri chinhu chinoramba simba chisina chimiro, α-Al2O3 inodiwa kuti ive nekuyerera kwakanaka, kushanda kwakanyanya kwe sintering, uye kugoverwa kwehukuru hwe particles kunoda huwandu hwakawanda, uye macrystallite akacheneswa zvakanaka ari nani.
Kushandiswa kweupfu hweα-alumina muzvinhu zvekupukuta
Mashandisirwo akasiyana ekupukuta anoda zvinhu zvakasiyana. Zvigadzirwa zvekupukuta zvisina kurongeka uye zvekupukuta zvepakati zvinoda simba rakasimba rekucheka uye kuomarara kwakanyanya, saka magadzirirwo azvo nemakristaro zvinofanirwa kunge zvakakora; α-alumina powder yekupukuta zvakanaka inoda kuti chigadzirwa chakaposhwa chive chisina kukora kwepamusoro uye chakajeka zvakanyanya. Saka, kana kristalo yekutanga yeα-Al2O3 idiki, zviri nani.
Kushandiswa kweupfu hweα-alumina muzvinhu zvinozadza
Muzvinhu zvinozadza, kuitira kuti zvive nechokwadi chekuti zvinobatana zvakanaka nezvinhu zvipenyu uye kuderedza kusimba kwesimba remuchina, chinhu chinonyanya kukosha pa α-Al2O3 ndechekuti kuyerera kwakanaka zvakakwana, zviri nani kuita sedenderedzwa, nekuti kana sphericity yakakwira, pamusoro payo. Simba diki, kuyerera kwebhora pamusoro payo kuri nani; chechipiri, upfu hwe α-Al2O3 hune kugadzirwa kwakakwana kwekristaro, kuchena kwemakemikari akawanda uye gravity yakakwira chaiyo ine conductivity yekupisa iri nani uye mhedzisiro iri nani kana ikashandiswa pakudzivirira uye zvinhu zvinofambisa kupisa.
Kushandiswa kweupfu hweα-alumina muzvinhu zve capacitor corundum
Muindasitiri, upfu hwe α-alumina hwakachena hunowanzo piswa muchoto chemagetsi chinodziya zvakanyanya kuti hugadzire corundum yakagadzirwa, inozivikanwawo se fused corundum. Chinhu ichi chine hunhu hwekuoma kwakanyanya, mipendero yakajeka nemakona, uye chimiro che microstructure chiri pedyo nedenderedzwa. Pakukuya nekukurumidza, tsanga dzinokwesha dzine simba guru rekucheka, uye tsanga dzinokwesha hadzisi nyore kupwanya, nokudaro zvichiwedzera hupenyu hwadzo hwekushanda.