Alumina ceramic inodzivirira kupfekaipurasitiki yemhando yepamusoro yakagadzirwa nealumina (Al₂O₃). Yave chinhu chakakosha chekugadzirisa kusakara kwakanyanya, ngura, uye mamiriro ekupisa kwakanyanya nekuda kwekuoma kwayo kwakanyanya, kuramba kusakara, uye kugadzikana kwemakemikari. Kana ichienzaniswa nezvinhu zvechinyakare zvisingaparare simbi, inowedzera hupenyu hwebasa remidziyo uye inoderedza kuwanda kwekugadzirisa uye mitengo mumaindasitiri akasiyana siyana, ichishanda semhinduro inokosha kumaindasitiri akasiyana-siyana kubva kusimba nesimbi kusvika kukugadzira zvinhu zvepamusoro.
Kushanda kwayo kwakanaka kunobva padata rechokwadi remuviri nemakemikari. Kuomarara kweRockwell (HRA) kwealumina ceramic kunogona kusvika 80-90, nesimba rekudzvanya rinodarika 850 MPa. Miedzo yehunyanzvi inoratidza kuti kuramba kwayo kupfeka kwakapetwa ka266 pane simbi yemanganese uye kwakapetwa ka171.5 pane simbi ine chromium yakawanda. Kana tichitarisa kuramba kupisa, kupisa kwayo kwenguva refu kunogona kusvika 300°C, uye inogona kumira ngura yeacid nealkali mukati me pH iri pakati pe3 kusvika 12. Izvi zvinoita kuti ikwanise kushanda zvakadzikama munzvimbo dzine simba guru, dzinopera simba, uye dzinoparadza, semuenzaniso, zvichiwedzera hupenyu hwekushanda kwemapaipi anotakura hupfu hwemarasha nekanopfuura ka10.
Kushanda kwealumina ceramic isingaparare kunobatsira kubva pakudzora kwakarurama maitiro ese kubva pazvinhu zvakagadzirwa kusvika pakusviba. Chekutanga, upfu hwealumina hunoitwa nekukuyiwa kwakanaka, nehukuru hwezvimedu hunowanzo dzorwa pasi pe 1 micron, zvichiita kuti huve hwakachena uye huwandu hwezvimedu huve hwakafanana. Maitiro ekutanga ekugadzira anosanganisira kudzvanya kwakaoma uye kudzvanya kwe isostatic, kwekupedzisira kuchipa huwandu hwakafanana kumuviri wegirini. Chekupedzisira, muviri wegirini unosviba pa1700°C, zvichigadzira chimiro che microcrystalline chakasimba, nehuremu hwezvinhu hunosvika pamusoro pe95%. Mafomula akabatanidzwa, akadai sekuwedzera zirconia (ZrO₂), anogona kuwedzera kuramba kwayo kusimba uye kusimba.
Chinhu ichi chinoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana. Mumaindasitiri esimba nekuchengetedza nharaunda, chinoshandiswa mumapaipi ehupfu hwemarasha emagetsi ekupisa, uye mumaclassifiers nema cyclone cones emasimende, zvichiwedzera hupenyu hwekushandisa michina nekatatu kusvika kashanu. Mumaindasitiri esimbi nekuchera, ma ceramic liners akaiswa mumapaipi e blast furnace coal injection nemapaipi ekubvisa guruva zvinobudirira zvinodzivirira zvakanyanya abrasive media senge iron ore powder, zvichideredza mari yekugadzirisa yegore negore kusvika ku60%. Uyezve, kuchena kwakanyanya (semuenzaniso, 99.7%) alumina ceramics inoshandiswawo muminda yekugadzira yepamusoro senge semiconductor wafer polishing.
Nguva yekutumira: Zvita-19-2025