ʻO nā Crystal Mullite e like me Needle e hāʻawi ana i ka helu heheʻe kiʻekiʻe, ka hoʻonui haʻahaʻa haʻahaʻa haʻahaʻa a me ke kūpaʻa maikaʻi loa i ka haʻalulu wela no ka fused Mullite

Corundum mullite
ʻO ka mullite fused kiʻekiʻe
Electro-fused mullite

Wehewehe pōkole

Hoʻokumu ʻia ʻo Fused Mullite e Bayer process alumina a me ke one quartz maʻemaʻe kiʻekiʻe aʻo ka hui ʻana i loko o ka umu ahi uila nui loa.

Loaʻa iā ia kahi kiʻekiʻe o nā kristal mullite like me ka nila e hāʻawi ana i ka helu heheʻe kiʻekiʻe, haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa a me ke kūpaʻa maikaʻi loa i ka haʻalulu wela, deformation ma lalo o ka ukana, a me ka corrosion kemika i ke kiʻekiʻe wela.

E HOAKAKA ANO

Hoʻohui ʻia ʻo Mullite 75

Nā mea		Unite	Papa kuhikuhi	Maʻamau
haku mele ʻana	Al₂O₃	%	73.00-77.00	73.90
	SiO₂	%	22.00-29.00	24.06
	Fe₂O₃	%	0.4 ka nui (Nā uku 0.5% ka nui)	0.19
	K2O+Na₂O	%	0.40 ka nui	0.16
	CaO+MgO	%	0.1% ka nui	0.05
ʻO ka refractoriness		℃	1850min
ʻAno nui		g/cm³	2.90min	3.1
Maʻiʻo ʻāpana aniani		%	10 ka nui
3Al₂O₃.2SiO₂Māhele		%	90 min

F-Fused; M-Mulite

Hoʻohui ʻia ʻo Mullite 70

Nā mea		Unite	Papa kuhikuhi	Maʻamau
haku mele ʻana	Al₂O₃	%	69.00-73.00	70.33
	SiO₂	%	26.00-32.00	27.45
	Fe₂O₃	%	0.6 kiʻekiʻe (Nā uku 0.7%ʻoi aku)	0.23
	K2O+Na₂O	%	0.50 ka nui	0.28
	CaO+MgO	%	0.2% ka nui	0.09
ʻO ka refractoriness		℃	1850min
ʻAno nui		g/cm³	2.90min	3.08
Maʻiʻo ʻāpana aniani		%	15max
3Al₂O₃.2SiO₂Māhele		%	85 min

Kaʻina Hana Hana

Hoʻokumu ʻia ʻo Fused Mullite e Bayer process alumina a me ke one quartz maʻemaʻe kiʻekiʻe aʻo ka hui ʻana i loko o ka umu ahi uila nui loa.

Palapala noi

Hoʻohana nui ʻia ʻo ia e like me nā mea maka no nā refractory kiʻekiʻe, e like me nā pōhaku lepo i loko o ka umu ahi ahi a me nā pōhaku i hoʻohana ʻia i ka umu wela wela i ka ʻoihana kila.

Hoʻohana ʻia ia i ka ceramic kiln a me ka ʻoihana petrochemical a me nā noi ʻē aʻe he nui.

Hoʻohana ʻia nā uku ʻo Fused Mullite i loko o nā uhi Foundry no kona kūpaʻa haʻalulu wela a me nā waiwai ʻole-wettability

Nā hiʻohiʻona

• Paʻa wela kiʻekiʻe
• Haʻahaʻa reversible hoʻonui wela
• Ke kū'ē i ka hoʻoukaʻana o ka slag i nā wela kiʻekiʻe
• Hoʻohui kemika paʻa

ʻO Mullite, kekahi ʻano mineral laha ʻole i loaʻa i ka alumini silicate (3Al2O3·2SiO2). Hoʻokumu ʻia ia ma ke puhi ʻana i nā mea aluminosilicate a ʻo ia ka mea koʻikoʻi o nā mea keʻokeʻo seramika, porcelains, a me nā mea hoʻonaninani kiʻekiʻe a me nā mea refractory. ʻO nā haku mele, e like me ka mullite, loaʻa ka ratio alumina-silica o ka liʻiliʻi loa he 3:2 ʻaʻole e heheʻe ma lalo o 1,810° C (3,290° F), akā ʻo ka poʻe me ka ratio haʻahaʻa e hoʻoheheʻe ʻia ma nā mahana haʻahaʻa e like me 1,545 ° C (2,813 °). F).

Ua ʻike ʻia ka mullite kūlohelohe ma ke ʻano he keʻokeʻo, elongated crystals ma ka Mokupuni o Mull, Inner Hebrides, Scot. Ua ʻike ʻia i loko o nā pā argillaceous i hoʻohui ʻia i loko o nā pōhaku igneous intrusive, kahi kūlana e hōʻike ana i nā wela kiʻekiʻe loa o ka hoʻokumu ʻana.

Ma waho aʻe o kona koʻikoʻi no nā seramika maʻamau, ua lilo ʻo mullite i mea koho o nā mea no nā seramika holomua a me ka hana ma muli o kāna mau waiwai maikaʻi. ʻO kekahi mau waiwai koʻikoʻi o ka mullite he haʻahaʻa wela haʻahaʻa, haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa, kūpaʻa maikaʻi i ka creep, ikaika kiʻekiʻe-mehana, a me ka paʻa kemika maikaʻi. ʻO ke ʻano o ka hoʻokumu ʻana i ka mullite e pili ana i ke ʻano o ka hoʻohui ʻana i nā reactants alumina a me ka silica. E pili pū ana i ka mahana e alakaʻi ai ka hopena i ka hoʻokumu ʻana o ka mullite (mullitation temperature). Ua hōʻike ʻia ka ʻokoʻa ʻana o nā mahana mulitisation a hiki i nā haneli degere Celsius ma muli o ke ʻano hana synthesis i hoʻohana ʻia.