Ceramic-metal sealing ceramic chip prepared by tape casting method

Abstract

The invention discloses a ceramic metal sealing ceramic chip prepared by a tape casting method. A sealing butt joint process flow comprises the following steps: (1) drying inorganic powder at 110 DEGC for 4 hours; (2) using a ball mill, weighing the powder as required, and performing crushing to obtain glass powder to be sealed; and (3) adding the prepared glass powder into a ball milling tank according to a pulping formula to prepare glass pulp. According to the ceramic metal sealing ceramic chip prepared by the tape casting method, different from the prior art, the ceramic metal sealing ceramic chip prepared by the tape casting method is suitable for high-temperature use, uniform in density, suitable for cutting and processing, good in fit plating with a plane, good in sealing propertyafter sintering and high in chemical stability in an oxidizing gas environment; and the thermal expansion amount is uniformly matched with each part of a solid oxide fuel cell, and the failure causedby local thermal expansion amount difference is avoided, so that the air tightness, the insulativity, the thermal stability and the chemical stability of the solid oxide fuel cell are greatly improved.

Description

technical field [0001] The invention relates to the technical field of ceramic-metal sealing under high-temperature working conditions, in particular to a ceramic-metal sealing ceramic sheet prepared by a casting method. Background technique [0002] Solid Oxide Fuel Cells (Solid Oxide Fuel Cells, SOFCs) are a new type of green power generation technology that combine fuels (e.g., H2, natural gas) on oxygen ion-conducting ceramics with oxidizing gases (e.g., air) to generate chemical can be converted into electricity and heat. Due to the harsh working environment and high working temperature of solid oxide fuel cells, the sealing materials of fuel cell stacks are required to have good airtightness, insulation, thermal stability and chemical stability, etc., but so far there is no One material can satisfy all conditions, so the sealing becomes a bottleneck restricting the development of planar SOFC. [0003] At present, the traditional process of ceramic-metal sealing is ma...

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Problems solved by technology

[0004] However, the coating uniformity of this traditional process is poor, and the structure of the formed sealing layer is not uniform, which makes it difficult to ensure the airtightness of the high temperature solid oxide fuel cell. Therefore, we propose a ceramic-metal Hermetic Ceramics

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