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Calcium zirconate material doped with metal and preparation method and application of calcium zirconate material

A calcium zirconate, metal technology, applied in electrochemical variables of materials, chemical instruments and methods, fuel cells, etc., can solve the problems of high price, poor mechanical properties and stability, and high cost, and achieve low cost, physical properties and chemical properties. Stable performance and less pores

Inactive Publication Date: 2018-09-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing materials for dense diffusion layer are generally LSM powder, LSC powder or LSF powder, etc., but these materials are expensive, high in cost, and have poor mechanical properties and stability

Method used

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  • Calcium zirconate material doped with metal and preparation method and application of calcium zirconate material
  • Calcium zirconate material doped with metal and preparation method and application of calcium zirconate material
  • Calcium zirconate material doped with metal and preparation method and application of calcium zirconate material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a method for preparing a metal-doped calcium zirconate material, which specifically includes the following steps:

[0028] S1, calcium carbonate (CaCO 3 ) powder, zirconia (ZrO 2 ) powder and chromium oxide (Cr 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Cr 2 o 3 =1:0.7:0.15 for batching. Among them, CaCO 3 The analytical purity of the powder is 99%, ZrO 2 The powder is analytically pure with a purity of 99%, Cr 2 o 3 The analytical purity of the powder was 99.9%.

[0029] S2. Mix all the powders obtained in step S1 together and put them into an agate mortar for grinding for 2.5 hours to form the first material to be molded. The particle size of the first molded material is ≤80 μm.

[0030] Specifically, using an agate mortar for grinding has simple operation and low cost, and avoids the need to add some reagents when grinding in other ways, which may lead to the introduction of impurities or increase the experiment time. Mixing a...

Embodiment 2

[0049] This embodiment provides a method for preparing a metal-doped calcium zirconate material, which specifically includes the following steps:

[0050] S1, calcium carbonate (CaCO 3 ) powder, zirconia (ZrO 2 ) powder and chromium oxide (Cr 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Cr 2 o 3 =1:0.9:0.05 for batching. Among them, CaCO 3 The analytical purity of the powder is 99%, ZrO 2 The powder is analytically pure with a purity of 99%, Cr 2 o 3 The analytical purity of the powder was 99.9%.

[0051] S2. Mix all the powders obtained in step S1 and put them into an agate mortar for grinding. The grinding time is 2 hours to form the first material to be molded. The particle size of the first material to be molded is ≤80 μm.

[0052] S3. Compress the first material to be molded under a compression pressure of 6.5 MPa by cold pressing, and then perform calcination at 1200° C. for 8 hours to obtain a chromium-doped calcium zirconate composite. The composition of ...

Embodiment 3

[0059] This embodiment provides a method for preparing a metal-doped calcium zirconate material, which specifically includes the following steps:

[0060] S1, calcium carbonate (CaCO 3 ) powder, zirconia (ZrO 2 ) powder and chromium oxide (Cr 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Cr 2 o 3 =1:0.8:0.1 for batching. Among them, CaCO 3 The analytical purity of the powder is 99%, ZrO 2 The powder is analytically pure with a purity of 99%, Cr 2 o 3 The analytical purity of the powder was 99.9%.

[0061] S2. Mix all the powders obtained in step S1 together and put them into an agate mortar for grinding for 3 hours to form the first material to be molded. The particle size of the first molded material is ≤80 μm.

[0062] S3. Compress the first material to be molded under a compression pressure of 12 MPa by cold pressing, and then perform calcination at 1300° C. for 5 hours to obtain a chromium-doped calcium zirconate composite. The composition of the obtained comp...

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Abstract

The invention relates to a calcium zirconate material doped with metal and a preparation method and application of the calcium zirconate material. The calcium zirconate material doped with metal comprises the following raw materials of: calcium carbonate powder, zirconia powder and chromium oxide powder, wherein the molar ratio of the total of the zirconia powder and chromium oxide powder to the calcium carbonate powder is 1:1, and the chromium oxide powder accounts for 0.05-0.15, by mole, of the total of the zirconia powder and chromium oxide powder. The calcium zirconate material doped withchromium has both oxygen ion conductivity and electron conductivity at the same time, and has low price, excellent mechanical properties and stability. The preparation method of the calcium zirconatematerial doped with chromium has a simple process and low cost, the prepared calcium zirconate material doped with chromium has few pores, and the compactness and mechanical properties are improved greatly; the calcium zirconate material doped with chromium can be applied to a dense diffusion barrier layer in an oxygen sensor, a cathode of a solid oxide fuel cell or an oxygen separation membrane.

Description

technical field [0001] The invention belongs to the technical field of calcium zirconate materials, and in particular relates to a metal-doped calcium zirconate material, a preparation method and an application thereof. Background technique [0002] Electrochemical oxygen sensors are divided into two types: primary battery type and current limiting type. Since the potential of the galvanic oxygen sensor is a function of the logarithm of the concentration ratio, the galvanic oxygen sensor is less sensitive at high oxygen partial pressures. The limiting current of the limiting current oxygen sensor is a function of the concentration, so the measuring range is wider and the accuracy is higher. At present, the limiting current oxygen sensor is divided into three types: small hole type, porous type and dense diffusion barrier layer type. Among them, the small hole type and porous type have defects such as high cost, frequent pore deformation and solid particle clogging. In comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G25/00G01N27/41H01M4/86H01M8/0226
CPCC01G25/006C01P2002/72C01P2004/03G01N27/41H01M4/8652H01M8/0226Y02E60/50
Inventor 王相南刘涛于景坤
Owner NORTHEASTERN UNIV
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