Metal-ceramic built-up unit, a built-up framework for transfer of oxide ions, a built-up unit having a capability of sealing

A technology of oxides and structures, applied in the direction of single-tube conductors, separation methods, semi-permeable membrane separations, etc., can solve the problems of molten glass not being able to withstand pressure differences, laborious sealing, and inability to obtain stability, etc.

Inactive Publication Date: 2006-03-08
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] However, when molten glass is used for the sealing material, the sealing material is melted out from the joint during use, or when the pressures of the two gases separated as in the above-mentioned pure oxygen production are different, the molten glass The problem of intolerance to poor pressure
In addition, glass materials also have the following problems: high joint strength cannot be obtained; during long-term use at high temperatures, sealing material deterioration such as evaporation and crystallization of components occurs, and stable characteristics cannot be obtained; due to thermal expansion differences during low-temperature curing, Sealability cann

Method used

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  • Metal-ceramic built-up unit, a built-up framework for transfer of oxide ions, a built-up unit having a capability of sealing
  • Metal-ceramic built-up unit, a built-up framework for transfer of oxide ions, a built-up unit having a capability of sealing
  • Metal-ceramic built-up unit, a built-up framework for transfer of oxide ions, a built-up unit having a capability of sealing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] In fact, the following is added with Figure 5 Exemplary oxygen separation device.

[0154] That is, the hollow member 21 has a structure in which a dense membrane of oxide ion-permeable ceramics is formed on a cylindrical porous ceramic substrate with one end closed. For the oxide, both the dense membrane and the porous substrate are SrCo 0.9 Nb 0.1 o x . SUS304 steel was used for the flange member 22 and the core member 25, and SUS310S steel was used for the integrated plate 26 and the oxygen separation container 29. A dense film was formed with a thickness of about 50 μm on the porous substrate by using a slurry coating method. Silver clay is inserted into the storage portion formed by combining a plurality of members, and heat-treated at the softening temperature of silver to form 23, 27, and 30 made of silver.

[0155] As a result of experiments conducted at 850° C. while maintaining the pressure of the compressed air in the region 32 at 1 MPa, it was confirme...

Embodiment 2

[0159] In order to maximize the capabilities of the device of the present invention, a material search for an optimum composite was carried out. First, prepare an oxide by the method shown below.

[0160] As the raw material of the sample, La 2 o 3 , CaCO 3 , SrCO 3 、BaCO 3 , Fe 2 o 3 、Co 3 o 4 , Nb 2 o 5 、 Ta 2 o 5 、In 2 o 3 , SnO 2 , V 2 o 5 、TiO 2 、Cr 2 o 3 , MnO 2 , CuO, ZnO, NiO, Li 2 CO 3 , MgO, respectively weigh the required amount, use ethanol as a dispersant, and carry out ball milling and mixing with zirconia balls for 2 hours. The resulting slurry was dried, disintegrated, placed in a horn sheath made of MgO, and fired at 900° C. for 12 hours in the air. The calcined powder obtained by crushing is packed in a φ12mm die, uniaxially molded, and then put into an ice bag for CIP molding. In a horn sheath made of MgO, the obtained molded body was fired at an optimum temperature in the temperature range of 1150-1300° C. for 5 hours to obtain a di...

Embodiment 3

[0197] The ceramic-metal composite structure obtained by the same treatment as in Example 1 was heat-treated again, and the room temperature-high temperature (850° C.) cycle resistance was evaluated. This was repeated up to 10 times, and the airtightness at high temperature was checked in the same manner as in Example 2 for the last 10th time. As a result, it was confirmed that the airtightness was good. Then, when it cooled to room temperature, and evaluated similarly to Example 1, both adhesiveness and peelability were favorable. Due to such circumstances, the ceramic-metal composite structure of the present invention proved to be excellent in cycle resistance.

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Abstract

A sealing technique is established in which a seal can be easily formed and which is excellent in reliability and a heat cycle property in a high temperature region of 800 DEG C or higher, so as to provide a composite body preferably used for a device for producing pure oxygen, oxygen-rich air, and the like, a membrane reactor represented by that for partial oxidation of a hydrocarbon gas, a solid oxide fuel cell, an oxygen purification device, a heat exchanger, or the like. The present invention makes it possible to increase a possibility of practical use in a wide area which has been delayed in development owing to a bottleneck of improvement in a sealing property. Particularly, its application to the device for producing pure oxygen, oxygen-rich air, or the like, the membrane reactor represented by that for partial oxidation of the hydrocarbon gas, the solid oxide fuel cell, the oxygen purification device, the heat exchanger, or the like can greatly contribute to acceleration of the development.

Description

[0001] This application is a divisional application of the Chinese patent application with application number 01815345.3 submitted on September 7, 2001. technical field [0002] The present invention relates to a ceramic-metal composite, a composite structure for oxide ion transport, and a hermetic composite, and particularly to a diaphragm reactor, an oxygen separation device, and an oxide ion transport application device using them. object. Background technique [0003] As for the sealing technology in the high temperature region exceeding 800°C, examples are given below. [0004] First, production of pure oxygen and production of oxygen-enriched air will be described. This technology brings huge economical effects by supplying cheap oxygen or oxygen-enriched air in fields that consume a lot of oxygen, such as ironmaking, glass, and cement. The principle of producing pure oxygen or oxygen-enriched air using mixed conductive oxides that have both oxide ion conductivity an...

Claims

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Application Information

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IPC IPC(8): B01D63/06B01D71/02B01D53/22H01M8/02H01M8/12B01DB01D63/00C01GC04B35/00C04B35/495C04B35/50C04B37/02C04B41/85H01B5/06H01M
CPCY02E60/521Y02E60/525Y02E60/50
Inventor 伊藤涉佐近正堂野前等永井徹
Owner NIPPON STEEL CORP
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