Kaolin, kaolin kua whakapūkaratia, kaolin kua horoia, metakaolin.

Ko ngā whakamahinga o te kaolin ko:
Hei rauemi mata kohuke e tika ana mō ngā tini ahumahi, pērā i te hanga pepa, te uku, te rapa, te ahumahi matū, te paninga, te rongoā me te tiaki whenua, he āhua kirihou te kaolin, e pai ai te hurihanga, te whakakī me te hanga i te tinana paru uku.

Ko te mahi a te kaolin i roto i ngā uku he whakauru i te Al2O3, he mea e whai hua ana ki te hanganga o te mullite, e whakapai ake ana hoki i tōna pumau matū me tōna kaha sintering.

I te wā e whakakoi ana, ka pirau te kaolin ki te mullite, ka hanga i te anga matua o te kaha o te tinana matomato, ka taea te aukati i te whakarerekētanga o ngā hua, te whakawhānui i te pāmahana mura, me te hanga i te tinana matomato kia mā.

Ko te Metakaolin (MK) he silicate konumohe kore wai (Al2O3 · 2SiO2, AS2) i hangaia mā te whakamaroke o te kaolin (Al2O3 · 2SiO2 · 2H2O, AS2H2) i te pāmahana tika (600~900 ℃). Kei roto te Kaolin i te hanganga silicate paparua, ā, e herea ana ngā paparanga e te here van der Waals, e herea pūmau ana ngā iona OH. Ina whakamahanahia te kaolin i te hau, ka rerekē tōna hanganga i ngā wā maha. Ina whakamahanahia ki te 600 ℃, ka whakangaromia te hanganga paparua o te kaolin nā te whakamaroke, ka hanga he metakaolin wāhanga whakawhiti me te iti o te tioata. Nā te mea he koretake te whakaritenga ngota o te metakaolin, ka puta he āhua pumau thermodynamic me te ngāwari ki te whakakoi i raro i te whakaoho tika.

He momo ranunga kohuke kaha te Metakaolin. He silicate konumohe kore-āhua i hangaia mā te kaolin tino pai i whakawerahia i te pāmahana iti. He kaha pozzolanic teitei, e whakamahia ana hei ranunga raima, ā, ka taea hoki te whakamahi hei hanga i ngā pūmua whenua mahi-teitei.