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Zirconium tube for zirconia oxygen analyzer and preparation method of zirconium tube

An oxygen analyzer and zirconia technology, applied in the field of instrument analysis, can solve the problems of low density and strength of zirconium tubes, poor product consistency, poor thermal shock resistance, etc., and achieve good electrical conductivity and thermal shock resistance, forming and The sintering process is stable and easy to control, and the effect of high bending strength

Inactive Publication Date: 2018-09-07
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The advantages of the hot die casting method are low investment, simple process, and suitable for industrial production; the disadvantage is that due to the use of a large amount of paraffin as a binder, it must be dewaxed before sintering, which takes a long time, high energy consumption, and poor product consistency. Low density, low yield
The advantage of the injection molding method is that the production process is highly automated, the size of the green body is precise, and it is easy to control; the disadvantage is that more organic binders (such as polyethylene, epoxy resin, etc.) are used, and it takes time to remove these organic substances during the sintering process. energy consumption
And because the hot die-casting method and the injection molding method belong to low-pressure molding, and at the same time, more organic matter is used as a binder in the preparation process, so both the green body and the sintered zirconium tube have low density and strength, and poor thermal shock resistance. The problem

Method used

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  • Zirconium tube for zirconia oxygen analyzer and preparation method of zirconium tube
  • Zirconium tube for zirconia oxygen analyzer and preparation method of zirconium tube

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: Preparation of zirconium tube for zirconia oxygen analyzer (1)

[0037] Will Y 2 o 3 Dissolved with hot nitric acid and ZrOCl 2 and Al(NO 3 ) 3 The solution is mixed evenly, and the molar ratio of the three is 8:91.5:1. Precipitant ammonia water was added, and the resulting precipitate was washed with deionized water and ethanol solution, freeze-dried, ground, and then calcined (at a temperature of 700°C for 3 hours), and the calcined product was added with a binder to be ground and granulated. Put the ground and granulated powder on a vibration platform with a vibration frequency of 25 Hz (ZP-0.5ⅹ0.5 type, Xinxiang No. 1 Vibration Machinery Factory) into a rubber mold with a designed size and fill it with vibration. Then put the rubber mold filled with zirconia powder into a cold isostatic press (LDJ200 / 1000-300 type, Chuanxi Machine Factory), and press isostatically under a pressure of 180 MPa to obtain a zirconium tube biscuit. Then place the obta...

Embodiment 2

[0038] Embodiment 2: Preparation of zirconium tubes for zirconia oxygen analyzer (two)

[0039] Will Y 2 o 3 Dissolved with hot nitric acid and ZrOCl 2 and Al(NO 3 ) 3The solution is mixed evenly, and the molar ratio of the three is 8:90.5:3. Precipitant ammonia water was added, and the obtained precipitate was washed with deionized water and ethanol solution, freeze-dried, ground, and then calcined (at a temperature of 800° C. for 2 hours), and the calcined product was added with a binder to be ground and granulated. Put the ground and granulated powder into a rubber mold with a designed size on a vibration equipment with a vibration frequency of 28 Hz (ZP-0.5ⅹ0.5 type, Xinxiang No. 1 Vibration Machinery Factory) and fill it with vibration. Then put the rubber mold filled with zirconia powder into a cold isostatic press (LDJ200 / 1000-300 type, Chuanxi Machine Factory), and press isostatically under a pressure of 190 MPa to obtain a zirconium tube biscuit. Then place the ...

Embodiment 3

[0040] Embodiment 3: Preparation of zirconium tubes for zirconia oxygen analyzer (three)

[0041] Will Y 2 o 3 Dissolved with hot nitric acid and ZrOCl 2 and Al(NO 3 ) 3 The solution is mixed evenly, and the molar ratio of the three is 8:89:6. Precipitant ammonia water was added, and the resulting precipitate was washed with deionized water and ethanol solution, freeze-dried, ground, and then calcined (at a temperature of 900° C. for 1 h), and the calcined product was added with a binder to be ground and granulated. Put the ground and granulated powder on a vibration platform with a vibration frequency of 30 Hz (ZP-0.5ⅹ0.5 type, Xinxiang No. 1 Vibration Machinery Factory) into a rubber mold with a designed size and fill it with vibration. Then put the rubber mold filled with zirconia powder into a cold isostatic press (LDJ200 / 1000-300 type, Chuanxi Machine Factory), and press isostatically under a pressure of 200 MPa to obtain a zirconium tube biscuit. Then place the obt...

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Abstract

The invention belongs to the technical field of instrument analysis, and relates to a zirconium tube for a zirconia oxygen analyzer and a preparation method of the zirconium tube. The zirconium tube mainly contains zirconia and 3-8% of yttria by mole. By means of the zirconium tube for the zirconia oxygen analyzer and the preparation method of the zirconium tube, the prepared zirconium tube for the zirconia oxygen analyzer can have good density, strength, electrical conductivity and thermal shock resistance.

Description

technical field [0001] The invention belongs to the technical field of instrument analysis, and relates to a zirconium tube for a zirconia oxygen analyzer and a preparation method thereof. Background technique [0002] Zirconia oxygen analyzer is widely used in petrochemical, metallurgy, electric power, light industry and other industries due to its advantages of high sensitivity, good stability, fast response speed and simple structure. Among them, the zirconia oxygen analyzer can continuously, real-time and dynamically measure the oxygen content in the exhaust gas during the combustion process of industrial boilers to improve fuel combustion efficiency and reduce SO in flue gas. 2 , NO x The purpose of emissions, so as to achieve the energy saving and emission reduction of industrial boilers. [0003] The key component of the zirconia oxygen analyzer is the zirconium tube, which is made of yttria-stabilized zirconia material. Since the zirconia oxygen analyzer requires ...

Claims

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Application Information

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IPC IPC(8): C04B35/48G01N27/409
CPCC04B35/48C04B2235/3217C04B2235/3225C04B2235/77C04B2235/96G01N27/409
Inventor 沙顺萍向兰翔赵璐周欣燕鲁盛会高会玲
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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