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Metal-doped calcium zirconate material, and preparation method and use thereof

A calcium zirconate and metal technology, applied in the field of calcium zirconate materials, can solve problems such as high cost, poor mechanical properties and stability, and high price, and achieve low cost, stable physical and chemical properties, and good stability.

Inactive Publication Date: 2018-11-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Metal-doped calcium zirconate material, and preparation method and use thereof
  • Metal-doped calcium zirconate material, and preparation method and use thereof
  • Metal-doped calcium zirconate material, and preparation method and use thereof

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Experimental program
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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 iron oxide (Fe 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Fe 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%, Fe 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 hours to form the first material to be molded. The particle size of the first material to be molded is ≤100 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 ...

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 iron oxide (Fe 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Fe 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%, Fe 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 for 1.5 hours to form the first material to be molded. The particle size of the first material to be molded is ≤100 μm.

[0052] S3. Compress the first material to be molded under a compression pressure of 6 MPa by cold pressing, and then perform calcination at 1000° C. for 8 hours to obtain iron-doped calcium zirconate composites. The composition of the obtained complex is Ca...

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 iron oxide (Fe 2 o 3 ) powder in molar ratio, CaCO 3 :ZrO 2 :Fe 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%, Fe 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 ≤100 μm.

[0062] S3. Compress the first material to be molded under a compression pressure of 10 MPa by cold pressing, and then perform calcination at 1200° C. for 4 hours to obtain an iron-doped calcium zirconate composite. The composition of the obtained complex is...

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Abstract

The invention relates to a metal-doped calcium zirconate material, and a preparation method and a use thereof. The metal-doped calcium zirconate material comprises calcium carbonate powder, zirconia powder and iron oxide powder, and a ratio of the total mole of the zirconia powder and the iron oxide powder to the mole of the calcium carbonate powder is 1:1; and the iron oxide powder accounts for 0.05-0.15 of the total mole of the zirconia powder and the iron oxide powder. The iron-doped calcium zirconate material has the advantages of oxonium ion conductivity, electron conductivity, low price,excellent mechanical performances and excellent stability. The preparation method of the iron-doped calcium zirconate material has the advantages of simple process and low cost; and the prepared iron-doped calcium zirconate material has the advantages of extremely few pores, greatly increased compactness and greatly improved mechanical performances. The iron-doped calcium zirconate material can be used in compact diffusion barrier layers in oxygen sensors, cathodes of solid oxide fuel cells, or oxygen separation films.

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): G01N27/416H01M8/0217H01M4/90C01G25/00B01D53/22
CPCB01D53/228C01G25/00G01N27/4162H01M4/9033H01M8/0217Y02E60/50
Inventor 王相南刘涛于景坤
Owner NORTHEASTERN UNIV
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