Uthini umahluko phakathi kwe-white corundum kunye ne-alumina

I-corundum emhlophe kunye ne-alumina ayiyonto enye. Ngokuphathelele isizathu, vumela umhleli ovela kuHenan Sicheng akuxelele ngokweenkcukacha: Yintoni umahluko phakathi kwe-corundum emhlophe kunye ne-alumina?

1. I-corundum emhlophe i-artificial abrasive eyenziwe nge-alumina njengento eluhlaza kwaye inyibilika kwaye ipholile kwiqondo lokushisa eliphezulu. I-alumina yinto enobunzima obuphezulu.

2. Icandelo eliphambili le-corundum emhlophe yi-alumina. Ngokukodwa, yindlela yekristale ye-alumina, eyi-α-Al2O3. Ukongeza kwi-alumina, kukho ukungcola okuncinci okufana ne-iron oxide kunye ne-silicon oxide. I-alumina yioksidi ezinzileyo ye-aluminiyam. Izinto eziphambili ziyi-oksijini kunye ne-aluminium, kunye nefomula yeekhemikhali yi-alumina. Kukho iikristale ezininzi ezifanayo kunye nezingafaniyo, ezifana ne-α-Al2O3, β-Al2O3 kunye ne-γ-Al2O3.

3. Iimpawu ezibonakalayo Indawo yokunyibilika kwe-corundum emhlophe yi-2250℃, kwaye imbonakalo ye-crystal form yi-crystal trigonal. Indawo yokunyibilika kwe-alumina ingaphantsi kwe-2010 ° C-2050 ° C. Ukubonakala kwayo ngumgubo omhlophe, kwaye isigaba sayo se-crystal sisigaba se-γ.

4. I-corundum emhlophe isetyenziswa ngokubanzi xa kusenziwa i-abrasives, kodwa ingasetyenziselwa kumashishini afana ne-catalysts, insulators, casting, kunye ne-sandblasting. Ialumina isetyenziswa ikakhulu kumashishini anjengokuqhuba ubushushu, ukupolisha, ukufakwa kwe-electroplating, kunye nezinto ezincedayo.