Kaolin wani ma'adinai ne wanda ba na ƙarfe ba, wanda yumbu ne da dutsen yumbu wanda ya ƙunshi ma'adanai na ƙungiyar kaolinite.Saboda fari da lallausan kamanni, ana kuma kiranta da ƙasa Baiyun.An ba shi sunan kauyen Gaoling da ke Jingdezhen, lardin Jiangxi.

Tsaftataccen kaolin sa fari ne, mai taushin hali, kuma mai laushi a cikin rubutu, yana da kyawawan halaye na zahiri da sinadarai kamar robobi da juriya na wuta.Abubuwan da ke cikin ma'adinai sun ƙunshi ma'adanai kamar kaolinite, halloysite, hydromica, illite, montmorillonite, da ma'adini da feldspar.Ana amfani da Kaolin ko'ina wajen yin takarda, tukwane, da kayan gyarawa, sannan ana amfani da suttura, filayen roba, glazes na enamel, da albarkatun fararen siminti.Ana amfani da ƙaramin adadin a cikin filastik, fenti, pigments, ƙafafun niƙa, fensir, kayan kwalliyar yau da kullun, sabulu, magungunan kashe qwari, magunguna, yadi, man fetur, sinadarai, kayan gini, tsaron ƙasa, da sauran sassan masana'antu.

Ma'adinan da ke cikin kaolin a yanayi an raba su zuwa ma'adinan yumbu da ma'adanai marasa yumbu.Ma'adinan yumbu sun haɗa da ma'adanai na ƙungiyar kaolinite da ƙaramin adadin montmorillonite, mica, da chlorite;Ma'adinan da ba yumbu ba sun haɗa da feldspar, quartz, da hydrates, da kuma wasu ma'adanai na ƙarfe irin su hematite, siderite, limonite, titanium ma'adanai irin su rutile, da kwayoyin halitta irin su filaye na shuka.Babban abin da ke ƙayyade aikin kaolin shine ma'adinan yumbu.

Kaolin ya zama ma'adinai mai mahimmanci ga masana'antu da yawa kamar yin takarda, yumbu, roba, injiniyan sinadarai, sutura, magunguna, da tsaron ƙasa.

Masana'antar yumbu ita ce masana'antar farko kuma wacce aka fi amfani da ita don aikace-aikacen kaolin.Matsakaicin adadin shine 20% zuwa 30% na dabara.Matsayin kaolin a cikin yumbu shine gabatar da Al2O3, wanda ke da fa'ida ga samuwar mullite, inganta yanayin sinadarai da ƙarfi.A lokacin sintering, kaolin ya bazu don samar da mullite, yana samar da babban tsari don ƙarfin jiki.Wannan na iya hana nakasar samfur, faɗaɗa zafin harbi, kuma ya ba jiki wani matakin fari.A lokaci guda kuma, kaolin yana da takamaiman matakin filastik, mannewa, dakatarwa, da ikon haɗin gwiwa, yana ba da laka mai ƙyalƙyali da kyalkyali mai kyau, yana sanya jikin yumbu mai amfani ga jikin abin hawa da grouting, yana sauƙaƙa don samarwa.Idan aka yi amfani da shi a cikin wayoyi, zai iya ƙara rufi kuma ya rage asarar dielectric.

Ceramics ba kawai suna da tsauraran buƙatun don filastik, mannewa, bushewar bushewa, ƙarfin bushewa, raguwar raguwa, ɓangarorin kaddarorin, juriya na wuta, da bayan harbe-harbe na kaolin, amma kuma sun haɗa da kaddarorin sinadarai, musamman kasancewar abubuwan chromogenic kamar baƙin ƙarfe. titanium, jan karfe, chromium, da manganese, wanda ke rage farin harbe-harbe kuma yana haifar da aibobi.

Abubuwan da ake buƙata don girman ƙwayar kaolin shine gabaɗaya cewa mafi kyawun mafi kyau, don haka laka na ain yana da kyakkyawan filastik da ƙarfin bushewa.Koyaya, don tafiyar da simintin gyare-gyaren da ke buƙatar saurin simintin gyare-gyare, haɓakar saurin grouting, da saurin bushewa, wajibi ne a ƙara girman ɓangarorin abubuwan.Bugu da ƙari, bambance-bambance a cikin crystallinity na kaolinite a cikin kaolin zai kuma tasiri sosai wajen aiwatar da aikin billet ɗin ain.Idan crystallinity yana da kyau, filastik da ikon haɗin gwiwa sun yi ƙasa, raguwar bushewa kadan ne, yawan zafin jiki yana da girma, kuma abun ciki na ƙazanta ya ragu;Akasin haka, filastik ɗinsa ya fi girma, bushewar bushewa ya fi girma, ƙarancin zafin jiki yana da ƙasa, kuma daidaitaccen abun ciki na ƙazanta shima ya fi girma.