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Method of joining ITM materials using a partially- or fully-transient liquid phase

A technology for connecting materials and multi-components, applied in the direction of separation methods, welding/cutting media/materials, chemical instruments and methods, etc.

Active Publication Date: 2004-12-01
AIR PROD & CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This connection technology is only used for metal bodies

Method used

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  • Method of joining ITM materials using a partially- or fully-transient liquid phase
  • Method of joining ITM materials using a partially- or fully-transient liquid phase
  • Method of joining ITM materials using a partially- or fully-transient liquid phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0073] Example 1-2: La 0.4 Sr 0.6 CoO 3-δ Disc and Tube Connections

[0074] The joint material batches shown in Table 1 were prepared by brushing and shaking the material in a 250 ml polyethylene tank for 1 hour with 100 g of 2-propanol and 250 g of spherical Y-TZP media. The slurry was dried and then dry milled for 30 minutes before being screened through a 20 mesh screen. The powder was calcined by heating at 100°C / hour to 900°C for 10 hours before cooling to room temperature at 100°C / hour. The calcined powder was sieved through a 40 mesh screen using an alumina pestle before preparing a slip by adding 0.5 g of polyvinyl butyral (PVB) as a dispersant to 38.0 g of toluene and 9.5 g of ethanol. 100 grams of calcined powder was added to a 250 ml polyethylene jar along with 250 grams of Y-TZP medium. The slip was placed on a brush shaker for 1 hour. Binder (7.25 grams of PVB) and plasticizer (3.88 grams of butyl benzyl phthalate (BBP)) were added so that the slip had a so...

Embodiment 3-10

[0084] Embodiment 3-10: the preparation of ink

[0085] To illustrate the whole range of compositions, 8 inks were prepared from the compositions shown in Table 2, ie from pure CuO and mixtures of copper oxide and calcium oxide. figure 2 Phase diagrams for Cu and Ca in air are shown, indicating that all components should have some proportion of molten phase above 1026°C. Example 5, the eutectic composition will form a liquid at the lowest temperature, and Example 10 will have the least amount of liquid phase at all temperatures.

[0086] Table 2

[0087] Composition number

Element

mass (g)

CuO

CaCO 3

3

CuO

200

0.0

4

CuO-0.1CaCO 3

175.5

24.53

5

CuO-0.15CaCO 3

163.7

36.34

6

CuO-0.2CaCO 3

152.1

47.86

7

CuO-0.3CaCO 3

129.9

70.06

8

CuO-0.4CaCO 3 ...

Embodiment 11-15

[0093] Examples 11-15: Connection of components

[0094] Ink 3-10 from Examples 3-10 was distributed onto the tube as in the tube-disc contact, and the tube was then placed on the disc and turned to squeeze the ink out, thereby displacing the milled La 0.4 Sr 0.6 CoO 3-δ (LSCo) tubing was attached to the milled LSCo disc. The ink is dried with warm moving air.

[0095] 18 tubes were connected to 18 discs at a pressure of about 10 kPa by heating at 1250°C for 1 hour using the following heating / cooling profile: from room temperature (RT) to 1250°C (at 1250°C 1 hour), at 50°C / hour from 1250-700°C, at 25°C / hour from 700-650°C, at 17°C / hour from 650-600°C, at 10°C / hour from 600-550°C, to 5°C / hour from 550-500°C, 2.5°C / hour from 500-450°C, 2°C / hour from 450-400°C, 50°C / hour from 400-20°C. After sealing the tubes are checked for leaks. Selected specimens were polished with diamond paste, or crushed, before observation by SEM. The cross-section of the polished tube was checked ...

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Abstract

A method of forming a composite structure includes: (1) providing first and second sintered bodies containing first and second multicomponent metallic oxides having first and second identical crystal structures that are perovskitic or fluoritic; (2) providing a joint material containing at least one metal oxide: (a) containing (i) at least one metal of an identical IUPAC Group as at least one sintered body metal in one of the multicomponent metallic oxides, (ii) a first row D-Block transition metal not contained in the multicomponent metallic oxides, and / or (iii) a lanthanide not contained in the multicomponent metallic oxides; (b) free of metals contained in the multicomponent metallic oxides; (c) free of cations of boron, silicon, germanium, tin, lead, arsenic, antimony, phosphorus and tellurium; and (d) having a melting point below the sintering temperatures of the sintered bodies; and (3) heating to a joining temperature above the melting point and below the sintering temperatures.

Description

[0001] Statement Regarding Federally Funded Research or Development [0002] This invention was made at least in part with support from the US Department of Energy under grant DE-FC-98FT40343. The US Government has certain rights in this invention. technical field [0003] The present invention relates to a method of forming a bond at the interface between two sintered bodies comprising multicomponent metal oxides of a specific crystal structure. When the sintered body is used in a device such as an oxygen separation device, it is often necessary to make it firmly connected, or even to provide a gas-tight joint which is required to withstand the operating conditions of the device. Typical sintered bodies in the above devices are ion transport membranes (electrolytes), connectors, supports, ceramic tubes, closures and conduits, and the like. Such sintered bodies are usually tube-tube, tube-plate, and plate-plate connections, respectively. Background technique [0004] Any ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B37/00B01J20/06B23K35/00B32B3/00B32B3/26B32B7/00B32B9/00B32B15/04B32B17/00B32B18/00C04BC04B35/45
CPCC04B2235/3281B01D2256/12C04B2235/3215C04B37/005C04B2235/6567C04B2235/3208C04B2235/76B23K35/001C04B2235/6025C04B2235/3213C04B2235/6565C04B2235/3227C04B2235/6562C04B35/01C04B2235/656B01D53/228C04B2237/34C04B2235/3272C04B2237/06Y10T428/24926Y10T428/249953Y02E50/10Y02E50/30C10L5/447C10L5/36C10L2230/088C10L2290/32
Inventor D·P·布特R·A·库特勒S·W·赖德斯M·F·卡罗兰
Owner AIR PROD & CHEM INC
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