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Methods and apparatus for casting ceramic sheets

一种陶瓷片、陶瓷薄片的技术，应用在陶瓷成型机、制造工具、涂层等方向，能够解决生陶瓷片或带不适处理等问题

Inactive Publication Date: 2011-09-28
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] While the techniques described above are suitable for forming thin flexible sintered ceramic structures, imperfections such as cracks or holes introduced into the green ceramic sheet or ribbon during casting can render the green ceramic sheet or ribbon unsuitable for further processing

Method used

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  • Methods and apparatus for casting ceramic sheets
  • Methods and apparatus for casting ceramic sheets
  • Methods and apparatus for casting ceramic sheets

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] The methods and apparatus described herein relate to the formation of thin (eg, less than 45 microns thick) flexible ceramic electrolyte sheets, such as yttria-stabilized zirconia ceramic sheets, that can be used in conjunction with solid oxide fuel cell devices. figure 1 One embodiment of a tape caster apparatus for forming the ceramic sheet is shown. A tape caster typically includes a casting bed, a casting head, a drying chamber, a carrier film support, carrier film transfer rolls and carrier film collection rolls, one or more devices for dissipating or mitigating static buildup on the carrier film. The ceramic slip, the tape caster, and the method of use of the tape caster for forming green ceramic sheets will be described in more detail herein.

[0018] The flexible ceramic electrolyte sheet described here utilizes figure 1 The tape caster shown is formed by coating the ceramic slip onto a carrier film passing through the tape caster. Ceramic slips typically co...

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Abstract

A method for making a thin, free-standing ceramic sheet may include drawing a carrier film proximate a casting head and across a casting bed of a tape caster at a rate from about 2 cm / min to about 500 cm / min. Depositing a thin film of ceramic slip less than about 150 [mu]m on the carrier film with the casting head. The ceramic slip may comprises a ceramic powder with an ultimate crystallite size of less than about 10 [mu]m dispersed in a fluid vehicle such that the ceramic slip has a ceramic solids fraction of greater than about 20 % by volume. The deposited ceramic slip may be dried on the carrier film thereby forming a green ceramic sheet on the carrier film. After the green ceramic sheet is dried, the green ceramic sheet may be sintered.

Description

[0001] This invention was made in part with Government support under Agreement No. 70NANB4H3036 awarded by the US Department of Commerce. The government may have certain rights in some of the claims in this invention. [0002] This application claims priority to and benefit of US Provisional Patent Application No. 61 / 197,955, filed October 31, 2008, which is based upon and incorporated herein. technical field [0003] The present invention relates to methods and apparatus for forming ceramic sheets, and more particularly, to methods and apparatus for forming flexible ceramic electrolyte sheets by casting. Background technique [0004] Thin flexible sintered structures such as sintered ceramic sheets have a wide range of practical applications. For example, flexible sintered structures may be used in electronic and / or electro-optic applications such as waveguides, or as substrates for electronic coatings, superconductors, or high temperature superconductors. The flexible si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/486C04B35/632C04B35/634C04B35/626B28B5/02B28B11/24B29C41/26
CPCC04B35/6263C04B2235/5445C04B35/634B28B11/243C04B2235/606B28B5/027C04B35/486C04B2235/549C04B2235/6025C04B35/6264C04B2235/9623C04B35/632C04B35/6342C04B2235/5436C04B2235/661C04B2235/6562C04B2235/6567C04B2235/6565
Inventor L·克斯特T·D·凯查姆B·S·柯克D·J·圣朱利安
Owner CORNING INC