Bending-resistant high-temperature composite load bearing board and preparation method thereof

A setter and high-temperature technology, which is applied in lighting and heating equipment, furnace components, furnaces, etc., can solve problems such as falling off or cracking, weakening of high-temperature strength, bending and deformation of setters, etc., to prolong service life and improve high-temperature resistance The effect of improving the bending strength and reducing the manufacturing cost

Active Publication Date: 2020-04-24
江苏三恒高技术窑具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the actual high-temperature service conditions, the high-temperature strength of the alumina substrate layer is very weak in capacity, and the capacity of the setter plate is bent and deformed. In addition, due to the difference in linear expansion coefficient between sprayed zirconia and alumina, it is easy to appear in the use environment of rapid cold and hot cycles. Problems with shedding or cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A bending-resistant high-temperature composite setter, which is a composite setter with a three-layer structure consisting of an alumina layer, a zirconia layer, and a silicon carbide layer from the outside to the inside, and the quality of each component raw material of each layer of the setter The percentage is, alumina layer: alumina powder ≤50um 50%, corundum 60~100 mesh 25%, corundum 325 mesh 15%, kaolin ≤200 mesh 10%; zirconia layer: zirconia 250~400 mesh 90%, calcium oxide 325 mesh 6%, yttrium oxide 325 mesh 4%;

[0014] Silicon carbide layer: 35% of silicon carbide 6~30 mesh, 40% of silicon carbide 80~120 mesh, 15% of silicon carbide 325 mesh, 10% of kaolin <270 mesh; The mass percentage of the part is required to be mixed in the mixer for 3 to 4 hours. After the material is evenly mixed, the material is unloaded and stacked, and the material is trapped for 36 to 48 hours for later use; Mix the materials in the mixer for 6~8 hours. After the materials are evenl...

Embodiment 2

[0016] A bending-resistant high-temperature composite setter, referring to Example 1, the mass percentage of each component raw material of each layer of the setter is: alumina layer: alumina powder ≤ 50um 40%, corundum 60-100 mesh 30 %, corundum 325 mesh 25%, kaolin ≤ 200 mesh 5%; zirconia layer: zirconia 250~400 mesh 92%, calcium oxide 325 mesh 5%, yttrium oxide 325 mesh 3%; silicon carbide layer: silicon carbide 6~ 30 mesh 40%, silicon carbide 80~120 mesh 35%, silicon carbide 325 mesh 20%, kaolin <270 mesh 5%; Mix the materials in the machine for 3~4 hours. After the materials are evenly mixed, the materials are unloaded and stacked, and the materials are trapped for 36~48 hours before being used. In addition, the zirconia layer materials are mixed in the dry blender according to the mass percentage of the components for 6 ~8 hours, after the material is evenly mixed, the material is unloaded and stacked, and the material is stored for 12~24 hours before being used; in the ...

Embodiment 3

[0018] A bending-resistant high-temperature composite setter, referring to Example 1, the mass percentage of each component raw material of each layer of the setter is, the mass percentage of each component of the setter is, alumina Layer: alumina powder≤50um 47%, corundum 60~100 mesh 28%, corundum 325 mesh 23%, kaolin ≤200 mesh 2%; zirconia layer: zirconia 250~400 mesh 94%, calcium oxide 325 mesh 4% , yttrium oxide 325 mesh 2%; silicon carbide layer: silicon carbide 6~30 mesh 45%, silicon carbide 80~120 mesh 37%, silicon carbide 325 mesh 10%, kaolin <270 mesh 8%; , silicon carbide layer materials are mixed in the mixer for 3~4 hours according to the mass percentage of the components, and the materials are stacked after the materials are evenly mixed. The mass percentage of the components is required to be mixed in a dry blender for 6-8 hours, and the material is unloaded and stacked after the material is evenly mixed, and the material is stored for 12-24 hours before standby;...

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Abstract

The invention discloses an anti-bending type high-temperature composite load bearing board, and belongs to the field of preparation of fire-resistant kiln furniture; an outer surface layer is a load-bearing isolation layer composed of aluminum oxide as a main body, an inner surface layer is a load-bearing support layer composed of silicon carbide as a main body, and a toughening interface layer composed of zirconium oxide as a main body is arranged between the outer surface layer and the inner surface layer. At the same time, the invention also discloses a preparation method of the load bearing plate. Compared with the prior art, on the basis of fully mastering the use environment requirement of the composite load bearing plate and the main cause of damage, through the arrangement of the interface layer, the bonding strength of the inner layer and the outer layer is enhanced, the high-temperature breaking strength of the middle layer is improved, the high-temperature strength of the composite load bearing board is improved, the improvement of the bending resistance of the composite load bearing board is effectively reflected, the service life of the composite load bearing board isprolonged, and the manufacturing cost of a using unit is reduced.

Description

technical field [0001] The invention belongs to the field of refractory kiln furniture preparation, and in particular relates to a bending-resistant high-temperature composite setter and a preparation method thereof. Background technique [0002] Composite setter is a load-bearing kiln furniture sintered with electronic components represented by magnetic materials. It generally has a composite structure with silicon carbide as the middle layer and alumina as the wrapping layer. Iron, oxygen, manganese, zinc and other elements contained in electronic components are easy to react with silicon and other elements during high-temperature sintering, and the outer alumina layer directly contacts the fired products to reduce pollution to magnetic materials. The inner layer utilizes the high-temperature flexural strength of silicon carbide to provide bearing strength for the setter. However, at present, the composite setter with this structure is relatively prone to bending and defo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/488C04B35/565C04B35/622F27D5/00
CPCC04B35/117C04B35/488C04B35/565C04B35/622F27D5/00C04B2235/349C04B2235/5436C04B2235/5427C04B2235/3208C04B2235/3225C04B2235/656C04B2235/6567
Inventor 王立平王理达
Owner 江苏三恒高技术窑具有限公司
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