Glass-ceramic sealing material for medium-low-temperature solid oxide fuel cells and preparation method thereof
A solid oxide and fuel cell technology, applied in the field of sealing materials and preparation, can solve the problems of poor compatibility and poor thermal stability of battery components
Active Publication Date: 2015-07-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the problems of poor thermal stability and poor compatibility with battery components of the glass-ceramic sealing material at the operating temperature of the battery (600-800°C), the present invention combines a glass phase with good thermal stability and a ceramic phase with stable chemical properties. Direct mixing to prepare sealing materials
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] Below further illustrate the present invention by embodiment:
[0017] Preparation of glass powder: according to the percentage content of various components in each embodiment in Table 1, weigh SiO 2 、H 3 BO 3 , MgCO 3 , CaCO 3 , SrCO 3 、Al 2 o 3 , La 2 o 3 , Y 2 o 3 , ZrO 2 , NiO and Fe 2 o 3, after grinding on a planetary ball mill for 24 hours, take it out and dry it at 60~80°C. Put the dried raw material in a corundum crucible and melt it in a crucible frit furnace. The heating system adopted is: raise the temperature at a rate of 10 °C / min to 1100 °C for 1 hour to ensure that the carbonate in the raw material is completely decomposed, then increase the temperature at a rate of 5 °C / min to 1500 °C, and keep the temperature for 2-5 hours To ensure that the glass is completely melted, the crucible is taken out from the furnace and quickly put into deionized water at 25°C for quenching to obtain a uniform and transparent glass frit. The glass frit is d...
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
| Property | Measurement | Unit |
|---|---|---|
| quality score | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a glass-ceramic sealing material for medium-low-temperature solid oxide fuel cells, and the glass-ceramic sealing material is good in long-term stability, adjustable in thermal expansion coefficient and good in chemical compatibility with cell elements, and is composed of 60-100 wt% of a glass phase and 0-40 wt% of a ceramic phase. The glass phase employs a low-boron barium-free system, the crystallization temperature is higher than working temperature (600-800 DEG C) of the cells, no continuous crystallization happens during usage, and the thermal stability is good. The ceramic phase employs at least one of metal oxides, metal composite oxides, silicates and aluminosilicates with expansion factor of 9-16*10<-6> K<-1>, and is good in chemical compatibility with cell elements and the glass phase. The sealing material provided by the invention has the advantages of being simple in raw materials, convenient for preparation and usage processes and low in cost, and is suitable for sealing of medium-low-temperature solid oxide fuel cell piles.
Description
technical field [0001] The invention relates to a medium-low temperature solid oxide fuel cell (SOFC) sealing material and a preparation method, and is particularly suitable for high-temperature sealing between ceramic components of the medium-low temperature solid oxide fuel cell and stainless steel connectors. Background technique [0002] Solid oxide fuel cell (SOFC) has outstanding advantages such as high energy utilization rate, strong fuel applicability, and environmental friendliness. It is considered to be one of the most promising fuel cells, and the corresponding application and basic research work has also received extensive attention. Flat-plate SOFC has the advantages of high power density, simple preparation process, and low cost, and has become a hot spot in SOFC research at home and abroad. However, due to the harsh working conditions of SOFC (high working temperature, long heat treatment time, repeated thermal cycles, strong oxidizing atmosphere and reducing...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/02
Inventor 程谟杰王秀玲区定容
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI