Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Ceramic material (titanium-tungsten-silicon-carbon) for connector of SOFC (solid oxide fuel cell)

A technology of solid oxide and ceramic materials, which is applied to fuel cell parts, fuel cells, circuits, etc., can solve problems such as thermal expansion mismatch, achieve high creep resistance, overcome a lot of waste, and good oxidation resistance Effect

Inactive Publication Date: 2018-04-17
QINGDAO UNIV
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the volatilization problem of metal connecting body existing in the prior art, and problems such as thermal expansion mismatch, the object of the present invention is to provide a kind of novel ceramic material titanium-tungsten-silicon-carbon for solid oxide fuel cell (SOFCs) connecting body, It has a great practical prospect on SOFCs and can promote the industrialization process of solid oxide fuel cells

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ceramic material (titanium-tungsten-silicon-carbon) for connector of SOFC (solid oxide fuel cell)
  • Ceramic material (titanium-tungsten-silicon-carbon) for connector of SOFC (solid oxide fuel cell)
  • Ceramic material (titanium-tungsten-silicon-carbon) for connector of SOFC (solid oxide fuel cell)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] When x=0.05 in the chemical formula, the selected experimental material is titanium tungsten silicon carbon material (Ti 0.95 W 0.05 ) 3 SiC 2 , and its preparation process is as follows:

[0052] Ti, W, Si, and C element powders are used as synthetic materials. The above-mentioned material powders are prepared according to the ratio of 2.85:0.15:1:2. The raw powders are mixed with alcohol and put into a ball mill for ball milling. After 30 hours, it was taken out and sieved; it was cold-pressed in a graphite mold with a pressure of 10 MPa, and put into a hot-press furnace for hot-press synthesis. In the present invention, the technology adopted for the hot-pressing synthesis is: under the pressure of 70 MPa, heat preservation at 1650° C. for 60 minutes, and the reaction atmosphere is flowing Ar gas.

[0053] figure 1 The sintered dense (Ti 0.95 W 0.05 ) 3 SiC 2 XRD results of the bulk.

[0054] The density of the bulk material was measured to be 99.1%. Cut 1...

Embodiment 2

[0062] When x=0.025 in the chemical formula, the selected experimental material is titanium tungsten silicon carbon material (Ti 0.975 W 0.025 ) 3 SiC 2 , and its preparation process is as follows:

[0063] Ti, W, Si, and C element powders are used as synthetic materials. The above-mentioned material powders are prepared according to the ratio of 2.925:0.075:1:2. The prepared raw powders are mixed with alcohol and put into a ball mill for ball milling. After 24 hours, it was taken out and sieved; it was cold-pressed in a graphite mold with a pressure of 15 MPa, and put into a hot-press furnace for hot-press synthesis. In the present invention, the technology adopted for the hot-pressing synthesis is: under the pressure of 70 MPa, heat preservation at 1200° C. for 50 minutes, and the reaction atmosphere is flowing Ar gas. The density of the synthesized material is 97.6%.

[0064] figure 1 Medium is titanium tungsten silicon carbon material (Ti 0.975 W 0.025 ) 3 SiC 2 ...

Embodiment 3

[0068] When x=0.005 in the chemical formula, the selected experimental material is titanium tungsten silicon carbon material (Ti 0.995 W 0.005 ) 3 SiC 2 , and its preparation process is as follows:

[0069] Ti, W, Si, and C element powders are used as synthetic materials. The above-mentioned material powders are prepared according to the ratio of 2.985:0.015:1:2. The prepared raw powders are mixed with alcohol and put into a ball mill for ball milling. After 10 hours, it was taken out and sieved; it was cold-pressed in a graphite mold with a pressure of 5 MPa, and put into a hot-press furnace for hot-press synthesis. In the present invention, the process adopted for hot-pressing synthesis is: under 20MPa pressure, heat preservation at 1680°C for 20 minutes, then heat preservation at 1400°C for 80 minutes, and the reaction atmosphere is flowing Ar gas. The density of the synthesized material is 97.9%. The oxidation kinetic constant at 800°C is: 7.59×10 -14 g 2 cm -4 ·s ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thermal expansion coefficientaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the fields of energy engineering and technique, in particular to a novel ceramic material (titanium-tungsten-silicon-carbon) for a connector of a SOFC (solid oxide fuel cell).A chemical formula of the ceramic material is (Ti1-xWx)3SiC2(x is equal to 0.005 to 0.2). The ceramic material has the advantages that the anti-oxidizing property is excellent, and is better than theanti-oxidizing property of the existing commercial alloy Crofer22APU and Ebrite; after the ceramic material is oxidized, the conductivity is good; the thermal expansion coefficient is (9.7+ / -0.5)*10<-6>K<-1>, and is similar to the thermal expansion coefficient (10.5*10<-6>K<-1>) of the SOFCs electrolyte YSZ (yttria-stabilized zirconia); the anti-creepage property is high; the thermal stability isgood; the processing is easy; the density is high, and the problems of leakage and the like are avoided; compared with the alloy connector material, the ceramic material has the characteristics that1, the thermal expansion coefficient is similar to the thermal expansion coefficient of the YSZ; 2, the volatile pollutant is not produced in the working environment of the SOFCs, and the problem of acceleration of cathode poisoning and electric pack aging can be avoided; the problem of volatizing of the alloy connector in use can be solved, and the huge application prospect is realized in SOFCs.

Description

technical field [0001] The invention belongs to the field of energy engineering and technology, and in particular relates to a novel ceramic material titanium-tungsten-silicon-carbon used for solid oxide fuel cell (SOFCs) connectors. Background technique [0002] Due to the advantages of using carbon-containing fuels, high power generation efficiency and low power generation cost, solid oxide fuel cells have broad application prospects in the fields of distributed power stations and power sources. Although there have been some battery stacks in demonstration operation around the world, their large-scale commercialization is still restricted by the materials of each component. Among them, the linker material is one of the bottlenecks in the development of SOFCs. Before the 1990s, the link material of SOFCs was lanthanum chromate or doped lanthanum chromate. For high temperature solid oxide fuel cells, this material can meet the requirements. After the 1990s, with the devel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C04B35/56H01M8/02H01M8/0217
CPCC04B35/5607C04B2235/404C04B2235/422C04B2235/428C04B2235/658C04B2235/9607C04B2235/9684H01M8/02H01M8/0217Y02E60/50
Inventor 郑莉莉李美栓李希超钱余海徐敬军
Owner QINGDAO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com