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A process for preparing alumina ceramic tubes by vertical clean sintering

An alumina ceramic tube, ceramic tube technology, applied in discharge lamps, electrical components, circuits, etc., can solve the problem of uneven temperature, high bending deformation rate of long alumina ceramic tubes, inability to sinter or overburning alumina ceramic tubes, etc. problem, to reduce the bending rate and avoid the effect of natural bending

Active Publication Date: 2018-06-01
湖南恒源精密陶瓷有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to propose an improved technical scheme for the sintering process of the existing alumina ceramic tube, so as to solve the problem that the bending deformation rate of the existing alumina ceramic tube is too high during the sintering process, and the temperature in the furnace is not uniform, so that the alumina ceramic tube cannot Product quality problems caused by sintering or overburning

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  • A process for preparing alumina ceramic tubes by vertical clean sintering
  • A process for preparing alumina ceramic tubes by vertical clean sintering
  • A process for preparing alumina ceramic tubes by vertical clean sintering

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Embodiment Construction

[0028] The following embodiments illustrate the technical solutions of the present invention in detail. The following embodiments are only exemplary, and can only be used to explain and illustrate the technical solutions of the present invention, and cannot be construed as limiting the technical solutions of the present invention.

[0029] The invention provides a process for preparing alumina ceramic tubes by vertical clean sintering, which includes the following steps:

[0030] Prepare a tubular crucible 05 with a lid 06, such as Figure 1 to Figure 3 As shown, in this embodiment, the material of the tubular crucible 05 is the same as the material of the lid, and both are made of magnesium oxide refractory material or recrystallized silicon carbide refractory material. Both the tubular crucible 05 and the lid 06 can be reused to reduce production costs.

[0031] A ceramic tube blank is prepared. The ceramic tube blank includes a tubular ceramic tube blank body 01, and a protrusion...

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Abstract

The present invention relates to a vertical clean sintering process for preparing alumina ceramic tube. The process includes preparing a tubular crucible; preparing a ceramic tube biscuit containing a tubular ceramic tube biscuit body and a flange head; inserting the tubular ceramic tube biscuit body into the tubular crucible, wherein the flange head is on the upper edge of the tubular crucible; covering a crucible lid, and completely sealing the ceramic tube biscuit in a cavity between the tubular crucible and the crucible lid; and sintering, taking out the furnace, and removing the flange head, so as to complete the preparation of alumina ceramic tube. The tubular crucible makes the ceramic biscuit in the crucible in an upright suspension manner, avoids natural curvature of traditional horizontal placement, and effectively reduces the bending rate of the alumina ceramic tube. By placing the ceramic tube in a complete closed cavity, the ceramic tube biscuit does not directly contact with the flame in the kiln in the firing process, and the surface of the ceramic tube is not affected.

Description

Technical field [0001] The invention belongs to the technical field of alumina ceramic lamp tube preparation, in particular to a vertical clean sintering process for preparing alumina ceramic tube. Background technique [0002] The metal halide lamp using polycrystalline alumina translucent ceramics as the material of the arc tube has the advantages of high working temperature, high luminous efficiency, low light decay, good color rendering and long life. [0003] The current ceramic metal halide lamp arc tube is mainly made of translucent alumina ceramics. The shape of the arc tube is mainly cylindrical, cylindrical and conical combined type, ellipsoidal, but the existing types of these types are complex and difficult to process. The forming agent needs to be added during manufacture, which increases the production cost. [0004] At present, the application range of alumina ceramic tubes is continuously expanding, especially the high-purity, long-length alumina ceramic tube product...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/30C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/64C04B2235/66H01J61/302
Inventor 吕冠军林韩邦李惠龙王节强汪乾
Owner 湖南恒源精密陶瓷有限公司