Kaolin, kaolin yakakangwa, kaolin yakagezwa, metakaolin.

Mashandisirwo e kaolin anosanganisira:
Sezvinhu zvicherwa zvinodiwa mumaindasitiri akawanda, akadai sekugadzira mapepa, zvedongo, rabha, indasitiri yemakemikari, zvekufukidza, mishonga nekudzivirira nyika, kaolin ine plasticity yakati, iyo inoita kuti dhaka redongo redongo rikwanise kutenderedza, kukwesha uye kugadzira.

Basa rekaolin muzviumbwa zvesimbi nderekuisa Al2O3, iyo inobatsira pakuumbwa kwemullite uye inovandudza kugadzikana kwayo kwemakemikari uye simba rekupisa.

Munguva yekusviba, kaolin inoora kuita mullite, ichiumba chimiro chikuru chesimba remuviri wegirini, izvo zvinogona kudzivirira kuchinja kwezvigadzirwa, kuwedzera tembiricha yekupisa, uye kuita kuti muviri wegirini uve nekuchena kwakati.

Metakaolin (MK muchidimbu) isimbi yealuminium silicate (Al2O3 · 2SiO2, AS2 muchidimbu) inoumbwa nekushaya mvura kwekaolin (Al2O3 · 2SiO2 · 2H2O, AS2H2 muchidimbu) patembiricha yakakodzera (600~900 ℃). Kaolin ndeyechimiro chesilicate chakaiswa layered, uye zvikamu zvacho zvakasungwa ne van der Waals bond, umo ma OH ions akasungwa zvakasimba. Kana kaolin ikapiswa mumhepo, chimiro chayo chinochinja kakawanda. Kana yapiswa kusvika pa600 ℃, chimiro chekaolin chakaiswa layered chichaparadzwa nekuda kwekushaya mvura, zvichigadzira transition phase metakaolin isina crystallinity. Nekuti kurongeka kwemamorekuru emetakaolin hakuna kurongeka, inopa thermodynamic metastable state uye ine gellability pasi pe excitation yakakodzera.

Metakaolin imhando yekusanganiswa kwezvicherwa kunoshanda zvikuru. Isimbi isina chimiro yakaumbwa nekaolin yakapfava zvikuru inonyungudutswa pakupisa kwakaderera. Ine simba rakawanda repozzolanic, inonyanya kushandiswa sekusanganiswa kwekongiri, uye inogona kushandiswawo kugadzira mapolymer epamusoro-soro.