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Refractory castable with high thermal shock resistance
The invention relates to a refractory castable with high thermal shock resistance; the refractory castable includes flint clay, high-alumina bauxite, alpha-alumina micro-powder, silicon micro-powder, a binder and an additive, and particularly includes the raw materials by the mass percentage: 20-28 parts of flint clay, 15-25 parts of flint clay, 10-20 parts of high-alumina bauxite, 10-15 parts of high-alumina bauxite, 15-25 parts of high-alumina bauxite fine powder, 3-8 parts of the alpha-alumina micro-powder, 1-5 parts of the silicon micro-powder, 1-4 parts of a zirconite powder, 2-8 parts of the binder, and 0.1-2 parts of the additive. The refractory castable has the advantages that the refractory castable can achieve excellent thermal shock stability which is characterized in that zirconite can generate a decomposition reaction at high temperatures, and zirconia with a tetragonal crystal shape is produced and is changed into monoclinic zirconcia during cooling, that is to say, with the introduction of zirconite, a high temperature stress induced phase transformation toughening mechanism is formed in a matrix, microscopic cracks are produced in the interior of a material, and thus the thermal shock loss resistant ability of the material is improved.
Refractory castable with high thermal shock resistance
The invention relates to a refractory castable with high thermal shock resistance; the refractory castable includes flint clay, high-alumina bauxite, alpha-alumina micro-powder, silicon micro-powder, a binder and an additive, and particularly includes the raw materials by the mass percentage: 20-28 parts of flint clay, 15-25 parts of flint clay, 10-20 parts of high-alumina bauxite, 10-15 parts of high-alumina bauxite, 15-25 parts of high-alumina bauxite fine powder, 3-8 parts of the alpha-alumina micro-powder, 1-5 parts of the silicon micro-powder, 1-4 parts of a zirconite powder, 2-8 parts of the binder, and 0.1-2 parts of the additive. The refractory castable has the advantages that the refractory castable can achieve excellent thermal shock stability which is characterized in that zirconite can generate a decomposition reaction at high temperatures, and zirconia with a tetragonal crystal shape is produced and is changed into monoclinic zirconcia during cooling, that is to say, with the introduction of zirconite, a high temperature stress induced phase transformation toughening mechanism is formed in a matrix, microscopic cracks are produced in the interior of a material, and thus the thermal shock loss resistant ability of the material is improved.
Refractory castable with high thermal shock resistance
GUAN YAN (author) / SUN LIJIE (author) / WANG CHAO (author) / LI CHUNBAO (author) / ZHAO YU (author) / LU YANXIA (author) / TANG JIANPING (author)
2015-11-18
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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