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Sealing glass powder, sealing glass ceramic powder and application

A technology for sealing glass and ceramic powder, applied in the field of sealing glass ceramics, can solve the problems of deterioration of ceramic reinforced glass sealing material, inability to adapt to SOFC long-term operation, unreasonable glass composition, etc., and achieves stable thermal expansion coefficient, low cost, and use long life effect

Active Publication Date: 2010-03-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the operating temperature of SOFC, the reaction of the glass phase and the ceramic phase causes the deterioration of important properties such as the thermal expansion coefficient of these materials, which leads to the failure of the seal and cannot adapt to the long-term operation of SOFC
The reason is that the performance of ceramic reinforced glass sealing materials deteriorates because the composition of the glass is not reasonable enough, and the incompatibility with ceramic materials

Method used

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  • Sealing glass powder, sealing glass ceramic powder and application
  • Sealing glass powder, sealing glass ceramic powder and application
  • Sealing glass powder, sealing glass ceramic powder and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) With 25mol% SiO 2 , 22mol%B 2 o 3 , 20mol% BaO, 20mol% CaO, 6mol% MgO, 0.5mol% La 2 o 3 , 5mol% Y 2 o 3 , 1.5mol% ZrO 2 The ratio of each component was weighed, mixed evenly, and placed in a platinum crucible.

[0056] (2) Put the crucible with the raw material in the muffle furnace, keep it warm at 1300°C for 4 hours, cool it down to 800°C, take out the water quenching, make glass material, then crush the glass material into glass pieces, and crush the glass The lumps are ball-milled into a powder form, the particle size of the powder is 50-60 μm, and dried.

[0057] (3) Heat 7.5g of paraffin wax to 100°C, add 92g of glass powder, stir and mix, add 0.5g of oleic acid, and mix evenly to form a wax slurry.

[0058] (4) Inject the wax slurry into the mould, cool, and demould to obtain a glass blank.

[0059] (5) Heat the glass blank obtained in step (4) at 130°C for 0.5h to harden it.

[0060] (6) Place the hardened glass blank between the fuel cell connecti...

Embodiment 2

[0064] (1) With 25mol% SiO 2 , 22mol%B 2 o 3 , 20mol% BaO, 10mol% SrO, 10mol% CaO, 6mol% MgO, 0.5mol% La 2 o 3 , 5mol%Y 2 o 3 , 1.5mol% ZrO 2 The ratio of each component was weighed, mixed evenly, and placed in a platinum crucible.

[0065] (2) Put the crucible with the raw material in the muffle furnace, keep it warm at 1300°C for 3 hours, cool it down to 800°C, take out the water quenching, make glass material, and then crush the glass material into glass pieces. The block balls are ground into glass powder, the particle size of the glass powder is 90-100 μm, and dried.

[0066] (3) 80vol% glass powder, 10vol% MgO, 10vol% Y 2 o 3 Stable ZrO 2 The proportion of each component was weighed and mixed uniformly to obtain a glass ceramic powder.

[0067] (4) Heat 15.0 g of paraffin wax to 100° C., add 83.0 g of glass ceramic powder, stir and mix, add 1.0 g of oleic acid and 1.0 g of stearic acid, and mix evenly to form a wax slurry.

[0068] (5) Inject the wax slurry i...

Embodiment 3

[0074] (1) With 23mol% SiO 2 , 24mol%B 2 o 3 , 25mol% BaO, 15mol% CaO, 5mol% MgO, 1mol% La 2 o 3 , 5mol%Y 2 o 3 , 2mol% ZrO 2 The ratio of each component was weighed, mixed evenly, and placed in a platinum crucible.

[0075] (2) Put the crucible with the raw material in the muffle furnace, heat it at 1300°C for 5 hours, cool it down to 800°C, take out the water and quench it to make a glass material, and then crush the glass material into glass pieces. The block balls are ground into glass powder and dried.

[0076] (3) With 80vol% glass powder, 5vol% MgO, 5vol% ZrO 2 , 10vol% with Y 2 o 3 Stable ZrO 2 The proportion of each component was weighed and mixed uniformly to obtain a glass ceramic powder.

[0077] (4) Heat 10 g of paraffin wax to 80° C., add 88.5 g of glass ceramic powder, stir and mix, add 0.5 g of oleic acid and 1.0 g of stearic acid, and mix evenly to form a wax slurry.

[0078] (5) injecting the wax slurry into the mold, cooling, and demolding to ob...

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PUM

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Abstract

The invention provides sealing glass powder, which is prepared from glass containing 20 to 40 mol percent of SiO2, 10 to 30 mol percent of B2O3, 10 to 40 mol percent of BaO, 2 to 15 mol percent of MgO, 0.1 to 5 mol percent of La2O3, 2 to 10 mol percent of Y2O3, 1 to 5 mol percent of ZrO, 0 to 15 mol percent of SrO and 0 to 30 mol percent of CaO. The invention also provides a method for forming sealing glass by sintering the glass powder. In addition, the invention provides glass ceramic powder and the method for forming the sealing glass ceramic by sintering the powder. Furthermore, the invention provides the application of the sealing glass and the sealing glass ceramic. The glass powder and the glass ceramic powder in the invention are simple in adopted raw materials and manufacturing process, low in cost and good in wetting quality and compatibility with connected parts and have the advantages of adjustable thermal expansion coefficient and good thermal stability.

Description

technical field [0001] The present invention relates to a sealing glass powder and the sealing glass formed by sintering the powder, and also relates to a sealing glass ceramic powder and the sealing glass ceramic formed by sintering the glass ceramic powder. A sealing glass powder and a sealing method for sealing glass-ceramic powder. Background technique [0002] Fuel cells have the advantages of high energy conversion efficiency, a wide range of fuel choices, convenient operation, environmental friendliness, and durability. They are suitable for the construction of power stations and even mobile power sources, and are recognized as green energy. Solid oxide fuel cell (SOFC) has two structures: plate type and tube type. Plate type SOFC has the advantages of high power density, simple preparation process, and low preparation cost. Medium temperature (600-800°C) plate type SOFC is currently the research topic of SOFC at home and abroad. hotspot. The sealing of plate-type S...

Claims

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Application Information

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IPC IPC(8): C03C8/24C04B37/00
Inventor 朱庆山张涛彭练谢朝晖张丹张朝英
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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