Ƙwallon alumina mai jurewa microcrystalline matsakaicin niƙa ne mai inganci, wanda aka yi shi da kayan ci-gaba da aka zaɓa, fasahar ƙira ta ci-gaba, kuma an ƙirƙira shi a cikin tukunyar rami mai zafin jiki.Wannan samfurin yana da babban yawa, babban taurin, ƙarancin lalacewa, kyakkyawan kwanciyar hankali da kuma juriya mai kyau na lalata.Ita ce mafi kyawun matsakaici don niƙa glazes, billets da foda na ma'adinai, kuma ana amfani da ita azaman hanyar niƙa don yumbu da yumbu da siminti., Rufi, refractories, inorganic ma'adinai foda da sauran masana'antu.