iindaba

I-Kaolin, i-calcined kaolin, i-kaolin ehlanjwe, i-metakaolin.

Ukusetyenziswa kwe-kaolin kubandakanya:
Njengemathiriyeli ekrwada yeminerali eyimfuneko kumashishini amaninzi, anjengokwenza amaphepha, iiseramikhi, irabha, ishishini lemichiza, ukutyabeka, iyeza kunye nokhuselo lwesizwe, i-kaolin inobuplastiki obuthile, obubangela ukuba umzimba wodaka lweceramic ulungele ukujika, ukugrumba kunye nokwenza.

Indima ye-kaolin kwi-ceramics kukwazisa i-Al2O3, ehambelana nokubunjwa kwe-mullite kwaye iphucula ukuzinza kwayo kweekhemikhali kunye namandla e-sintering.

Ngexesha le-sintering, i-kaolin ibola ibe yi-mullite, yenza isakhelo esiphambili samandla omzimba ohlaza, onokuthintela ukuguqulwa kweemveliso, ukwandisa ubushushu bokudubula, kwaye wenze umzimba oluhlaza ube nobumhlophe obuthile.

I-Metakaolin (i-MK ngokufutshane) i-aluminium silicate ye-anhydrous (Al2O3 · 2SiO2, AS2 ngokufutshane) eyenziwe ngokuchithwa kwe-kaolin (Al2O3 · 2SiO2 · 2H2O, AS2H2 ngokufutshane) kwiqondo lokushisa elifanelekileyo (600 ~ 900 ℃).I-Kaolin yeyesakhiwo se-silicate esinemaleko, kwaye iileya zibotshwe yi-van der Waals bond, apho i-OH ion ibotshwe ngokuqinileyo.Xa i-kaolin ifudunyezwa emoyeni, isakhiwo sayo siya kutshintsha amaxesha amaninzi.Xa ifudunyezwa ukuya kutsho malunga ne-600 ℃, isakhelo esilalayo se-kaolin siya kutshatyalaliswa ngenxa yokuphelelwa ngamanzi emzimbeni, yenze i-metakaolin yesigaba sotshintsho enobukristale obuhlwempuzekileyo.Ngenxa yokuba ulungiselelo lwemolekyuli ye-metakaolin ingaqhelekanga, ibonisa imeko ye-thermodynamic metastable kwaye i-gellability phantsi kwe-excitation efanelekileyo.

I-Metakaolin luhlobo lomxube weminerali osebenzayo kakhulu.Yi-amorphous aluminiyam silicate eyenziwe yi-ultra-fine kaolin calcined kwiqondo lokushisa eliphantsi.Inomsebenzi ophezulu we-pozzolanic, osetyenziswa ikakhulu njengomxube wekhonkrithi, kwaye ingasetyenziselwa ukwenza iipolima zejoloji ezisebenza kakhulu.

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Ixesha lokuposa: Jan-05-2023

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