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A kind of iron oxide-cobalt trioxide externally doped sealing glass and its preparation and use method

A technology for sealing glass and glass powder, which is applied in the field of glass sealing of metal substrates, can solve problems such as sealing failure and stress concentration at the sealing interface, and achieve the effects of improving sealing performance, reducing stress, and stabilizing the process

Active Publication Date: 2020-08-11
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stress concentration on the sealing interface and even the failure of the seal caused by the thermal expansion coefficient mismatch between the sealing material and the substrate are still unavoidable.

Method used

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  • A kind of iron oxide-cobalt trioxide externally doped sealing glass and its preparation and use method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: Preparation and sealing of materials

[0029] According to the proportioning of each component of embodiment 1 in table 1, take a certain amount of analytically pure raw material (Al 2 o 3 , SiO 2 、Na 2 O, CaO), and mixed evenly with a planetary ball mill for 24 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 1300°C at 3°C / min, and keep it for 1 hour; then, Take out the crucible, pour the melt into deionized water to quench, dry to obtain fragments of glass melt; grind, pass through a 100-mesh sieve to obtain glass powder, and then add a certain amount of externally mixed analytical pure powder. Mix the mixed powder with polyvinyl alcohol, fish oil, ethanol and toluene (the weight ratio is 80%, 2%, 1%, 10%, 7% in turn) to form a slurry, and disperse evenly in a ball mill; tape casting, Dry naturally, and then cut the embryo body into the required shape; place the embryo bo...

Embodiment 2

[0030] Embodiment 2: Preparation and sealing of materials

[0031] According to the proportioning of each component of embodiment 2 in table 1, take a certain amount of analytically pure raw material (Al 2 o 3 , SiO 2 、Na 2O, CaO), and mixed evenly with a planetary ball mill for 24 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 1350°C at 3°C / min, and keep it for 1 hour; then, Take out the crucible, pour the melt into deionized water to quench, dry to obtain fragments of glass melt; grind, pass through a 100-mesh sieve to obtain glass powder, and then add a certain amount of externally mixed analytical pure powder. Mix the mixed powder with methyl cellulose, polyvinyl alcohol, n-butanol and acetone (82%, 2%, 2%, 8%, 6% by weight in turn) to form a slurry, and disperse evenly by ball milling in a ball mill; Tape casting, dry naturally, and then cut into the embryo body of the desired shape; pla...

Embodiment 3

[0032] Embodiment 3: Preparation and sealing of materials

[0033] According to the proportioning of each component of embodiment 3 in table 1, take a certain amount of analytically pure raw material (Al 2 o 3 , SiO 2 、Na 2 O, CaO), and mixed evenly with a planetary ball mill for 24 hours; then put the powder into a platinum crucible, place it in the air atmosphere of a box-type resistance furnace, heat it to 1400°C at 3°C / min, and keep it for 1 hour; then, Take out the crucible, pour the melt into deionized water to quench, dry to obtain fragments of glass melt; grind, pass through a 100-mesh sieve to obtain glass powder, and then add a certain amount of externally mixed analytical pure powder. Mix the mixed powder with epoxy resin, polyacrylamide, isopropanol and toluene (the weight ratio is 84%, 1.5%, 0.5%, 9%, 5% in turn) to form a slurry, and disperse evenly in a ball mill; Stretching, drying naturally, and then cutting the embryo body into the required shape; place t...

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Abstract

The invention discloses sealing glass mixed with ferric oxide-cobalt oxide as well as a preparation method and a using method of the sealing glass. Glass powder comprises the following raw materials at a mass ratio: 20-40% of M2O, 0-20% of MeO, 40-60% of SiO2 and 0-20% of Al2O3 (M=Li, Na, K; Me=Ca, Mg, Sr). The mass of the mixed Fe2O3-Co2O3 is 0-30% of the glass powder. Part of the mixed Fe2O3 andCo2O3 enter into a glass network to generate a synergistic effect, so that the interface energy is reduced, and the sealing property is obviously improved; in addition, a compact spinel layer is promoted to be formed on a sealing interface, so that the element diffusion of the sealing interface can be effectively prevented, and an interface reaction between metal and the glass is inhibited. The residual mixed powder has the advantages of improving the overall coefficient of thermal expansion of a sealing material, reducing the mismatch with the coefficient of thermal expansion of a metal basematerial and effectively reducing the stress of the sealing interface.

Description

technical field [0001] The invention belongs to the field of glass sealing of metal substrates, in particular to a Fe 2 o 3 -Co 2 o 3 Added sealing glass and methods of making and using the same. Background technique [0002] Solid fuel cell (SOFC) is an electrochemical device for renewable energy that has attracted much attention in recent years. Its high efficiency, pollution-free, all-solid-state structure and wide adaptability to a variety of fuel gases make it widely used. SOFC technology is a key technology for the transformation of the future energy structure, and has the advantage of being able to directly convert chemical energy into electrical energy efficiently and without pollution. Compared with the rapid development of other components of solid fuel cells, the sealing material has become a bottleneck restricting its development. Glass material has become the first choice of sealing material due to its unique properties. At present, researchers at home and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24
CPCC03C8/24
Inventor 张腾董正伟林德伟
Owner FUZHOU UNIV