Kaolin, calcined kaolin, wasshed kaolin, metakaolin.

ʻO ka hoʻohana ʻana o kaolin:
Ma ke ʻano he mineral pono no ka nui o nā ʻoihana, e like me ka hana ʻana i ka pepa, ka seramika, ka ʻōpala, ka ʻoihana kemika, ka uhi ʻana, ka lāʻau lapaʻau a me ka pale aupuni, loaʻa ka kaolin i kekahi plasticity, kahi e hoʻohuli ai ke kino lepo ceramic i ka huli ʻana, grouting a me ka hana ʻana.

ʻO ke kuleana o kaolin i loko o nā seramika ʻo ia ka hoʻolauna ʻana iā Al2O3, kahi kūpono i ka hoʻokumu ʻana o ka mullite a hoʻomaikaʻi i kona kūpaʻa kemika a me ka ikaika sintering.

I ka wā o ka sintering, hoʻoheheʻe ʻia ka kaolin i mullite, e hana ana i ke kumu nui o ka ikaika o ke kino ʻōmaʻomaʻo, hiki ke pale i ka deformation o nā huahana, hoʻonui i ka mahana ahi, a hoʻolilo i ke kino ʻōmaʻomaʻo i kekahi keʻokeʻo.

ʻO ka Metakaolin (MK no ka pōkole) he silicate alumini anhydrous (Al2O3 · 2SiO2, AS2 no ka pōkole) i hana ʻia e ka dehydration o kaolin (Al2O3 · 2SiO2 · 2H2O, AS2H2 no ka pōkole) ma kahi mahana kūpono (600 ~ 900 ℃).Aia ka Kaolin i ka papa silicate papa, a ua nakinakiia na papa e ka paa van der Waals, kahi i paa ai na iona OH.Ke hoʻomehana ʻia ka kaolin i ka lewa, e loli pinepine kona ʻano.Ke hoʻomehana ʻia a hiki i ka 600 ℃, e luku ʻia ke ʻano o ka kaolin ma muli o ka dehydration, e hana ana i kahi metakaolin hoʻololi me ka crystallinity maikaʻi ʻole.No ka mea, ʻaʻole maʻamau ka hoʻonohonoho molekala o ka metakaolin, hōʻike ia i kahi kūlana thermodynamic metastable a loaʻa ka gellability ma lalo o ka excitation kūpono.

ʻO ka Metakaolin kahi ʻano hoʻohui mineral ikaika loa.He alumini silicate amorphous i hoʻokumu ʻia e ka kaolin maikaʻi loa i calcined ma ka wela haʻahaʻa.Loaʻa iā ia ka hana pozzolanic kiʻekiʻe, i hoʻohana nui ʻia e like me ka hoʻohui ʻana i ka koneki, a hiki ke hoʻohana ʻia e hana i nā polymers geological kiʻekiʻe.