Ceramic sintering jig and manufacturing method thereof

Abstract

A ceramic burning bearing jig provided by the invention comprises a base body made of an aluminum oxide material with the purity being 90% or above, an isolation layer which covers the surface of the base body and is made of ceramic isolation powder, and a bonding layer located between the isolation layer and the base body. The bonding layer is formed by high-temperature sintering of the contact surfaces of the isolation layer and the base body, the bonding layer can be utilized to enhance the binding force between the isolation layer and the base body, the isolation layer is prevented from being separated from the base body, the thickness of the isolation layer is 0.05-1.00 mm, the isolation layer can be utilized to isolate the aluminum oxide base body from a sintered product, the plate sticking phenomenon is avoided, the consumption of the ceramic isolation powder can be reduced, the cost can be reduced, the high cost performance is achieved, the phenomena of warping, cracking, pulverization and the like are not prone to being caused, stability is better, even if the isolating layer warps, the warping range and the warping degree are small, and the sintered product is not prone to being squeezed to be damaged. The manufacturing method of the ceramic sintering jig is easy to operate, easy to implement, convenient to adjust and high in yield.

Description

technical field

[0001] The present application relates to the technical field of firing fixtures, and more specifically relates to a ceramic firing fixture and a method for manufacturing the ceramic firing fixture. Background technique

[0002] The firing fixture is the carrier of fired products such as metal products and electronic components during the firing process. In order to adapt to high temperature and reduce costs, most of the existing firing fixtures are ceramic firing fixtures with alumina as the main component. When this kind of fixture is firing titanium alloy, nickel-based alloy, manganese-zinc ferrite, nickel-zinc ferrite and other materials, the alumina component in the fixture is easy to react with the fired product, causing sticking phenomenon. It not only affects the quality of fired products, but also forms a polluted area on the ceramic firing fixture, which affects the repeated use of the ceramic firing fixture.

[0003] There are also ceramic firing ...

Examples

Embodiment 1

[0056] In this embodiment, the material of the insulating ceramic powder is zirconia (ZrO 2 ), evenly spray zirconia (ZrO 2 ) powder suspension, after drying, a layer of 0.05-1.00mm thick zirconia (ZrO 2 ) composition of the ceramic isolation film, at this time, the nickel-based alloy product is directly placed on the ceramic isolation film, after 1380 ℃ high-temperature vacuum sintering process, due to the existence of the ceramic isolation film, during sintering, the nickel-based alloy product The nickel element is not in contact with the aluminum element in the alumina ceramic plate, does not react, and does not appear to stick to the plate. It only needs to be sintered once, and it can be made into nickel-based alloy products and ceramic firing fixtures. low, high efficiency.

Embodiment 2

[0058] Example 2 is basically the same as Example 1, the difference is that in Example 2, the alumina ceramic plate and the ceramic isolation film are first sintered at a high temperature of 1450 ° C to form a bonding layer and an isolation layer, and then the nickel-based alloy product The part is placed above the isolation layer, and after a high-temperature vacuum sintering process at 1380 ° C, it is made into a nickel-based alloy product, and there is no sticking phenomenon. In Example 2, due to the good bonding relationship between zirconia (ZrO2) and alumina, in When nickel-based alloy products are sintered, zirconia particles will not be filled in the vacuum sintering furnace like dust, and will not pollute the sintering of subsequent products.

Embodiment 3

[0060] Embodiment 3 is substantially the same as Embodiment 1, and the difference is that the material of the ceramic spacer powder in Embodiment 3 is yttrium oxide (Y 2 o 3 ), during sintering, yttrium oxide (Y 2 o 3 ) reacts with the alumina in the alumina ceramic plate, and generates YAlO according to the amount of alumina contacted 3 and YAl 11 o 18 , where YAlO 3 Located on the side close to the isolation layer, YAl 11 o 18 Located on the side close to the alumina ceramic plate.

technical field

[0001] The present application relates to the technical field of firing fixtures, and more specifically relates to a ceramic firing fixture and a method for manufacturing the ceramic firing fixture. Background technique

[0002] The firing fixture is the carrier of fired products such as metal products and electronic components during the firing process. In order to adapt to high temperature and reduce costs, most of the existing firing fixtures are ceramic firing fixtures with alumina as the main component. When this kind of fixture is firing titanium alloy, nickel-based alloy, manganese-zinc ferrite, nickel-zinc ferrite and other materials, the alumina component in the fixture is easy to react with the fired product, causing sticking phenomenon. It not only affects the quality of fired products, but also forms a polluted area on the ceramic firing fixture, which affects the repeated use of the ceramic firing fixture.

[0003] There are also ceramic firing ...

Examples

Embodiment 1

[0056] In this embodiment, the material of the insulating ceramic powder is zirconia (ZrO 2 ), evenly spray zirconia (ZrO 2 ) powder suspension, after drying, a layer of 0.05-1.00mm thick zirconia (ZrO 2 ) composition of the ceramic isolation film, at this time, the nickel-based alloy product is directly placed on the ceramic isolation film, after 1380 ℃ high-temperature vacuum sintering process, due to the existence of the ceramic isolation film, during sintering, the nickel-based alloy product The nickel element is not in contact with the aluminum element in the alumina ceramic plate, does not react, and does not appear to stick to the plate. It only needs to be sintered once, and it can be made into nickel-based alloy products and ceramic firing fixtures. low, high efficiency.

Embodiment 2

[0058] Example 2 is basically the same as Example 1, the difference is that in Example 2, the alumina ceramic plate and the ceramic isolation film are first sintered at a high temperature of 1450 ° C to form a bonding layer and an isolation layer, and then the nickel-based alloy product The part is placed above the isolation layer, and after a high-temperature vacuum sintering process at 1380 ° C, it is made into a nickel-based alloy product, and there is no sticking phenomenon. In Example 2, due to the good bonding relationship between zirconia (ZrO2) and alumina, in When nickel-based alloy products are sintered, zirconia particles will not be filled in the vacuum sintering furnace like dust, and will not pollute the sintering of subsequent products.

Embodiment 3

[0060] Embodiment 3 is substantially the same as Embodiment 1, and the difference is that the material of the ceramic spacer powder in Embodiment 3 is yttrium oxide (Y 2 o 3 ), during sintering, yttrium oxide (Y 2 o 3 ) reacts with the alumina in the alumina ceramic plate, and generates YAlO according to the amount of alumina contacted 3 and YAl 11 o 18 , where YAlO 3 Located on the side close to the isolation layer, YAl 11 o 18 Located on the side close to the alumina ceramic plate.

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