Unlock instant, AI-driven research and patent intelligence for your innovation.

Zirconium oxide-based solid electrolyte powder for automobile oxygen sensor and preparation method thereof

An automotive oxygen sensor and solid electrolyte technology, applied in the field of gas sensor manufacturing, can solve the problems of difficult preparation of highly dispersible nanopowder, complex preparation process, difficult filtration of hydroxide precipitation, etc. The effect of simplicity and equipment simplification

Inactive Publication Date: 2013-07-03
UNIV OF SCI & TECH BEIJING
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the obtained hydroxide precipitate is difficult to filter, and the roasted product is too hard agglomerate, it is difficult to prepare highly dispersed nanopowder
In order to solve the above problems, in the literature J.Euro.Soc.1996,16(4):437-440, Gao L et al. prepared a tetragonal phase ZrO of 12-14nm by the emulsion method. 2 (3Y) powder, but the problem is that the preparation process is complicated, and it is necessary to add emulsifier Tween80 and xylene organic solvent that pollute the environment

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
  • Zirconium oxide-based solid electrolyte powder for automobile oxygen sensor and preparation method thereof
  • Zirconium oxide-based solid electrolyte powder for automobile oxygen sensor and preparation method thereof
  • Zirconium oxide-based solid electrolyte powder for automobile oxygen sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] to synthesize 1 gram of Y 2 o 3 The content is 5% (mol) 5YSZ material as an example.

[0026] Weigh 2.3852g of ZrOCl with an electronic analytical balance 2 ·8H 2 O, add 7.4ml of distilled water to make a solution with a concentration of 1mol / L, and treat ZrOCl 2 ·8H 2 After O is completely dissolved, add 4.4ml Y 2 o 3 Concentration of 0.02g / ml Y(NO 3 ) 3 solution to form a mixed solution; then add 0.59ml of polyethylene glycol 400 accounting for 5% of the volume of the mixed solution, and then add 0.05ml of oxalic acid with a mass concentration of 5% at a temperature of 50°C, and heat and melt until a uniform mixed solution is formed; Finally, under constant stirring, add ammonia water dropwise to the mixture to adjust the pH to 9, and let it stand for 4 hours to make it a white gel; dry the gel in a vacuum oven at 90°C for 1 hour, and then put it in a muffle furnace After heating up to 400°C for 1 hour, take it out and grind it, then put the powder into the m...

Embodiment 2

[0028] to synthesize 1 gram of Y 2 o 3 The content is 4% (mol) 4YSZ material as an example.

[0029] Weigh 2.4297g of ZrOCl with an electronic analytical balance 2 ·8H 2 O, add 7.54ml of distilled water to make a solution with a concentration of 1mol / L, and treat ZrOCl 2 ·8H 2 After O is completely dissolved, add 3.55ml Y 2 o 3 Concentration of 0.02g / ml Y(NO 3 ) 3 solution to form a mixed solution; then add 0.55ml of polyethylene glycol 400 accounting for 5% of the volume of the mixed solution, then add 0.05ml of oxalic acid with a mass concentration of 5% at a temperature of 60°C, and heat to dissolve until a uniform mixed solution is formed; Then, according to the process steps of Example 1, a white bulky nano-scale pure cubic phase zirconia-based solid electrolyte powder can be obtained. XRD results show that the obtained 4YSZ powder has a pure cubic phase structure.

Embodiment 3

[0031] to synthesize 1 gram of Y 2 o 3 The content is 3% (mol) 3YSZ material as an example.

[0032] Weigh 2.475g of ZrOCl with an electronic analytical balance 2 ·8H 2 O, add 7.7ml of distilled water to make a solution with a concentration of 1mol / L, and treat ZrOCl 2 ·8H 2 After O is completely dissolved, add 2.68ml Y 2 o 3 Concentration of 0.02g / ml Y(NO 3 ) 3solution to form a mixed solution; then add 0.52ml of polyethylene glycol 400 accounting for 5% of the volume of the mixed solution, then add 0.05ml of oxalic acid with a mass concentration of 5% at a temperature of 70°C, and heat to dissolve until a uniform mixed solution is formed; Then, according to the process steps of Example 1, a white bulky nano-scale pure cubic phase zirconia-based solid electrolyte powder can be obtained. XRD results show that the obtained 3YSZ powder has a pure cubic phase structure.

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

No PUM Login to View More

Abstract

The invention belongs to the field of gas sensor manufacturing, and relates to nano powder for zirconium oxide-based solid electrolyte ceramics (one of critical materials for preparing an automobile oxygen sensor) and a preparation method thereof. By using ZrOCl2.8H2O as the main raw material, the nano powder is prepared by a method comprising the following steps: sequentially adding Y(NO3)3.6H2O, water, surfactant and dispersant, preparing into a uniform mixed solution, and then dropwisely adding precipitant. By using the wet chemical coprecipitation-gel method, adding the dispersant and thesurfactant, and calcining the precursor obtained by precipitation at 750-820 DEG C for 15-20 minutes without filtration and washing processes, completely stable ZrO2 ultrafine powder which contains cubic-phase low-agglomerated Y2O3 of 10-20nm only and no monoclinic one can be obtained, and the powder is applicable to preparing the zirconium oxide-based solid electrolyte powder for a chip limitingcurrent type automobile oxygen sensor. The invention has the advantages of simple process and low cost, and the prepared ceramic can meet development trends of high performance, miniaturization and chip actualization of the limiting current type automobile sensor.

Description

technical field [0001] The invention belongs to the field of gas sensor manufacturing, and in particular relates to a method for preparing a nanoscale powder material for preparing zirconia-based solid electrolyte ceramics, one of the key materials of an automobile oxygen sensor. technical background [0002] In terms of automotive sensor applications, zirconia-type oxygen sensors currently account for about 99% of the entire oxygen sensor market, and among them, yttrium oxide-stabilized type is the most common. Pure ZrO 2 It is a monoclinic phase below 1100°C, a tetragonal phase between 1100°C and 2300°C, and a cubic phase above 2300°C. During this phase transition process, due to the accompanying huge volume change, the ZrO 2 cleavage, so that pure ZrO 2 Lost application value. At present, people generally use ZrO 2 A certain amount of CaO, MgO, Y 2 o 3 Or rare earth oxides, so that its cubic phase structure can be stable to room temperature. [0003] Yttrium-stabi...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 纪箴田文怀赵光葛泳高红叶
Owner UNIV OF SCI & TECH BEIJING