Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lanthanum chromite-doped film type thermocouple and preparation method thereof

A technology of lanthanum chromate thin film and thermocouple, which can be used in the manufacture/processing of thermoelectric devices, materials for lead-out wires of thermoelectric devices, and thermometers with electric/magnetic elements that are directly sensitive to heat, etc., which can solve the instability of high temperature measurement , the maximum temperature limit, restricting the application of ITO thin films, etc., to achieve the effect of low cost, high operating temperature and high sensitivity

Inactive Publication Date: 2016-08-03
XI AN JIAOTONG UNIV
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, further research has found that ITO series thin film thermocouples will have very severe thermal volatilization in the high temperature region above 1000 °C, which will cause instability in high temperature measurement and limit the maximum temperature.
This severely restricts the application of ITO thin films in high-temperature measurement fields such as high-temperature hot runners.

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
  • Lanthanum chromite-doped film type thermocouple and preparation method thereof
  • Lanthanum chromite-doped film type thermocouple and preparation method thereof
  • Lanthanum chromite-doped film type thermocouple and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] La selected 0.8 Sr 0.2 CrO 3 And LaCrO 3 The powder is used as a thermocouple electrode material, and a thick film electrode is deposited on an alumina ceramic substrate 3 with a thickness of 1 mm by a screen printing process. The ceramic slurry used for screen printing is made of La 0.8 Sr 0.2 CrO 3 And LaCrO 3 The particle size of the powder is about 200nm, using a 1:2 mixed solution of ethyl cellulose and terpineol as the organic solvent, adding the ceramic powder to the organic matter in a ratio of 1:1 and mixing with strong stirring. Ceramic paste for screen printing. In order to obtain a good patterning, a U-shaped structure mask with a thermal electrode length of 12 cm and a width of 0.8 cm was selected to prepare the thick film electrode by screen printing. The screen used was 200 mesh. Print the ITO thick film on the substrate first, and then print the indium oxide thick film. After the two thick film materials are deposited, the thick film sample is heat treated...

Embodiment 2

[0038] La selected 0.9 Sr 0.1 CrO 3 And LaCrO 3 The powder is used as the material of thermocouple electrode, and the thick film electrode is deposited on the alumina ceramic substrate with a thickness of 3mm by the screen printing process. The ceramic slurry used for the screen printing is made of La 0.9 Sr 0.1 CrO 3 And LaCrO 3 The particle size of the powder is about 100nm, using a 1:2 mixed solution of ethyl cellulose and terpineol as the organic solvent, adding the ceramic powder to the organic matter in a ratio of 2:3 and mixing vigorously as Ceramic paste for screen printing. In order to obtain a good patterning, a U-shaped structure mask with a thermal electrode length of 25 cm and a width of 1.5 cm was selected to prepare the thick film electrode by screen printing. Print LaCrO on the substrate first 3 Thick film, then print La 0.9 Sr 0.1 CrO 3 Thick film. After the two thick film materials are deposited, the thick film sample is heat treated in a muffle furnace at 1200...

Embodiment 3

[0040] La selected 0.8 Sr 0.2 CrO 3 And La 0.9 Sr 0.1 CrO 3 The powder is used as the electrode material of the thermocouple, and the thick film electrode is deposited on the alumina ceramic substrate with a thickness of 10mm by the screen printing process. The ceramic slurry used for the screen printing is made of La 0.8 Sr 0.2 CrO 3 And La 0.9 Sr 0.1 CrO 3 The particle size of the powder is about 200nm, using a 1:2 mixed solution of ethyl cellulose and terpineol as the organic solvent, adding the ceramic powder to the organic matter in a ratio of 1:1 and mixing with strong stirring. Ceramic paste for screen printing. In order to obtain a good patterning, a U-shaped structure mask with a thermal electrode length of 20 cm and a width of 1.0 cm was selected to prepare the thick film electrode by screen printing. The screen used was 200 mesh. First print the ITO thick film on the substrate, and then print the indium oxide thick film. After the two thick film materials are deposite...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
widthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a doped lanthanum chromite film type thermocouple and a preparation method thereof, aiming at meeting requirements of measuring at high temperature under extreme environment. The technical solution of the invention is such that: a doped lanthanum chromite film type thermocouple includes two hot electrodes which are disposed on a ceramic substrate; the two hot electrodes are in mutually overlapped connection; the materials of the two hot electrodes individually adopt a lanthanum chromite film which is doped with one or a plurality of doping elements of Mg, Ca, Sr, Ba, Co, Cu, Sm, Fe, Ni and V; the lanthanum chromite films of the two hot electrodes are doped with different types of doping elements, or are doped with the same type of doping elements having different contents.

Description

Technical field [0001] The invention relates to the field of sensor preparation technology and high-temperature temperature measurement technology, in particular to a doped lanthanum chromate film type thermocouple and a preparation method thereof. Background technique [0002] In the aero-engine design and verification experiment, in order to verify the combustion efficiency of the engine and the design of the cooling system, it is necessary to accurately test the temperature of the surface of the engine's turbine blades and the internal combustion chamber. Compared with traditional linear and block thermocouples, high-temperature ceramic thin-film thermocouples have the characteristics of small heat capacity, small size, and fast response speed. They can capture instantaneous temperature changes. At the same time, thin-film thermocouples can be directly deposited on the surface of the measured object. , Does not damage the structure of the tested component, and has a small impa...

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 Applications(China)
IPC IPC(8): G01K7/02C04B35/50H10N10/851H10N10/01H10N10/17
CPCC04B35/50G01K7/02C04B2235/3275C04B2235/3279C04B2235/3272C04B2235/3281C04B2235/3239C04B2235/3208C04B2235/3206C04B2235/3213C04B2235/3224C04B2235/3227C04B2235/3215C04B35/12C04B35/62222G01K7/028H10N10/851H10N10/01H10N10/17C04B2235/3241
Inventor 史鹏任巍刘丹刘明田边蒋庄德
Owner XI AN JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com