Pilikia Mullite

ʻO nā pōhaku lepo Mullite kahi pale pale alumini kiʻekiʻe me ka mullite ma ke ʻano he kristal nui.ʻO ka maʻamau, ʻo ka ʻike o ka alumina ma waena o 65% a me 75%.Ma waho aʻe o ka mullite, ʻo nā minela me ka haʻahaʻa alumina haʻahaʻa he wahi liʻiliʻi o ka vitreous phase a me ka cristobalite.Loaʻa i ka ʻike alumina kiʻekiʻe ka nui o ka corundum.

He kiʻekiʻe ka refractoriness o nā pōhaku Mullite, hiki ke piʻi ma luna o 1790 ° C.ʻO 1600 ~ 1700 ℃ ka mahana wela hoʻomaka.ʻO ka ikaika compressive i ka lumi lumi he 70-260MPa.Kūleʻa haʻalulu wela maikaʻi.

ʻElua ʻano o nā pōhaku lepo mullite sintered a me nā pōhaku lepo mullite fused.

Hana ʻia nā pōhaku lepo mullite sintered o ka clinker bauxite kiʻekiʻe-alumina ma ke ʻano he kumu nui, e hoʻohui ana i kahi liʻiliʻi o ka pālolo a i ʻole ka bauxite maka ma ke ʻano he mea hoʻopaʻa, a ua hana ʻia a puhi ʻia.Hana ʻia nā pōhaku lepo mullite me ka bauxite kiʻekiʻe, ka alumina ʻoihana a me ka pālolo refractory, a ua hoʻohui ʻia ka lanahu a i ʻole nā ​​ʻāpana coke ma ke ʻano he mea hoʻemi.Ma hope o ka hoʻoheheʻe ʻana, hana ʻia lākou e ka hoʻemi ʻana i ka electrofusion.

ʻOi aku ka nui o ka crystallization o fused mullite ma mua o ka mullite sintered, a ʻoi aku ka maikaʻi o kona pale ʻana i ka wela ma mua o nā huahana sintered.ʻO kā lākou hana wela kiʻekiʻe e hilinaʻi nui ʻia i ka ʻike o ka alumina a me ke kūlike o ka hāʻawi ʻana i ka pae mullite a me ke aniani.

Hoʻohana nui ʻia nā pōhaku Mullite no ka umu wela wela, ke kino o ka umu ahi a me lalo, ka umu ahi regenerator, ka kiln ceramic, ka uhi kihi make o ka ʻōnaehana ʻaila, etc.