Thermal insulation device for microwave sintering of ceramic material
A heat preservation device and microwave sintering technology, which is applied in the direction of furnace, furnace type, lighting and heating equipment, etc., can solve the problems of affecting the sintering process, increasing internal voids, and high replacement costs, achieving increased reuse times, fast heating rate, well-structured effects
Active Publication Date: 2018-11-02
NANJING UNIV OF SCI & TECH
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Problems solved by technology
However, in this device, the area between the crucible and the bottom insulation brick is filled with insulation cotton. During the sintering process, the temperature around the crucible is relatively high. During use, the local high temperature of the crucible will soften the surrounding insulation cotton, which will easily cause the crucible to collapse. Increase, accelerate the heat loss, and the heating element deviates from the temperature measurement port, resulting in inaccurate temperature measurement and affecting the sintering process
In addition, once the insulation cotton softens and collapses, all the insulation cotton must be replaced before it can be used again, and the replacement cost is high
Method used
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[0010] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0011] see figure 1 , the heat preservation device for microwave sintering of ceramic materials in the present invention mainly includes a mullite fiber box 2, a second ceramic fiber blanket 3, an aluminum silicate ceramic fiber board 4, a third ceramic fiber blanket 5, a polycrystalline mullite fiber board 6, Corundum mullite sleeve 7, polycrystalline mullite high temperature fiber 8, corundum mullite cover plate 12 and mullite fiber box cover plate 3;
[0012] In the device, the mullite fiber box 2 and the mullite fiber cover plate 13 constitute a box body. A layer of second ceramic fiber blanket 3 is placed at the bottom of the cavity of mullite incubator 2, an aluminum silicate ceramic fiber board 4 is placed above the second ceramic fiber blanket 3, and a third layer of ceramic fiber blanket is placed above the aluminum silicate ceramic...
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Abstract
The invention belongs to the technical field of microwave sintering, and discloses a thermal insulation device for microwave sintering of a ceramic material. The heat preservation device comprises a ceramic fiber blanket, a mullite fiber box and a cover plate of the ceramic fiber blanket, an aluminum silicate ceramic fiber plate, a corundum mullite fiber board, a corundum mullite sleeve and a cover plate of the corundum mullite fiber sleeve, polycrystalline mullite high-temperature fiber cotton and a glass fiber high-temperature belt, wherein a sintering sample is placed in a corundum crucible, a silicon carbide buried powder is adopted for auxiliary heating. According to the device, the heat preservation device is simple in structure, good in interchangeability and low in cost, the highest bearing temperature can reach 2000 DEG C, and the device can be repeatedly used at the temperature at 1700 DEG C or below; and meanwhile, the heat preservation effect is good, the temperature risingspeed is high.
Description
technical field [0001] The invention belongs to the technical field of microwave sintering, in particular to a thermal insulation device for microwave sintering of ceramic materials. Background technique [0002] Microwave sintering is a sintering method introduced in the field of ceramics in the 1970s. Its biggest feature is to use microwave energy to heat the sintered material as a whole. Due to the overall heating, the material is heated evenly and the temperature gradient is small. The properties of the sintered material are Uniform, fine grain, good compactness. In addition, microwave sintering also has the characteristics of high efficiency, energy saving, and environmental protection, and can achieve structures and properties that cannot be achieved by traditional sintering methods. However, the sintering temperature of ceramic materials is high, and the design of the heat preservation device has become one of the important factors that limit the application of micro...
Claims
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IPC IPC(8): F27B14/08
Inventor 殷增斌徐伟伟汪家傲闫时雨刘奎袁军堂程寓汪振华胡小秋
Owner NANJING UNIV OF SCI & TECH