CN101158660A - Laser heat conducting instrument - Google Patents
Laser heat conducting instrument Download PDFInfo
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- CN101158660A CN101158660A CNA2007101868721A CN200710186872A CN101158660A CN 101158660 A CN101158660 A CN 101158660A CN A2007101868721 A CNA2007101868721 A CN A2007101868721A CN 200710186872 A CN200710186872 A CN 200710186872A CN 101158660 A CN101158660 A CN 101158660A
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Abstract
The invention relates to a laser thermal conductivity meter, in particular to using a laser thermal conductivity meter to measure the high-temperature thermal diffusivity and the thermal coefficient of steel materials, belonging to the measuring and testing field. The invention is characterized in that: by adding a ring-shaped oxide ceramics gasket between a testing sample and an external housing of a sample room, the chemical reaction between silicon carbide (or graphite) external housing and the steel materials is avoided under the temperature over 1000 DEG C, thus leading a laser pulse method to be used for measuring the high-temperature thermal diffusivity and the thermal coefficient of the steel materials.
Description
One, technical field
The present invention relates to a kind of laser heat conducting instrument, particularly relate to the elevated temperature heat coefficient of diffusion and the coefficient of heat conductivity that utilize laser heat conducting instrument to measure ferrous materials, belong to measurement, field tests.
Two, background technology
The elevated temperature heat coefficient of diffusion and the coefficient of heat conductivity of ferrous materials have great significance for its smelting, process and application.LFA 427 conductometers are highly sophisticated devices (error＜3%) of the mensuration material thermal conductivity produced of the anti-company of speeding of Germany, and it utilizes laser pulse method accurately to measure thermal diffusion coefficient and the coefficient of heat conductivity of material in room temperature to the 1500 ℃ temperature range.The sample that this instrument is surveyed adapts to wide, comprises various materials such as pottery, glass, metal, fused mass, liquid, powder, fiber and multilayer material.During measurement, the lower surface of beam of laser PULSE HEATING sample utilizes infrared thermometer continuous detecting upper surface temperature over time, thereby draws the thermal diffusion coefficient of material, calculates the coefficient of heat conductivity of material.In order to guarantee measuring accuracy, need to add silit (or graphite) outer cover with holes at the sample overcoat.But when the elevated temperature heat coefficient of diffusion of measuring ferrous materials and coefficient of heat conductivity (probe temperature is greater than 1000 ℃),, outer cover is destroyed, cause test normally to carry out because chemical reaction at high temperature takes place for silit (or graphite) outer cover and ferrous materials.
Three, summary of the invention
The object of the present invention is to provide a kind of silit (or graphite) outer cover of avoiding directly to contact with ferrous materials, prevented chemical reaction at high temperature between ferrous materials and silit (or graphite) outer cover, guarantee normally carrying out of test, thereby realized a kind of laser heat conducting instrument of the measurement of ferrous materials thermal diffusion coefficient and coefficient of heat conductivity under the high temperature.
Technical solution: the present invention includes the sample chamber, the sample chamber is made up of outer cover, mensuration sample, alundum tube and sample mount, and the ring-shaped pottery pad is housed between outer cover and the sample.
The present invention is by increasing the annular oxide ceramics pad with high-temperature stability between the sample of LFA427 laser heat conducting instrument and outer cover, avoid silit (or graphite) outer cover to contact with the direct of ferrous materials, prevent chemical reaction at high temperature between ferrous materials and silit (or graphite) outer cover, make high temperature (greater than the 1000 ℃) thermal diffusion coefficient and the coefficient of heat conductivity that utilize the LFA427 conductometer to measure ferrous materials become possibility.
Four, description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the synoptic diagram of ring-shaped pottery gasket construction of the present invention;
20CrMnTi steel thermal diffusion coefficient and coefficient of heat conductivity result that Fig. 3 measures for the present invention;
GCr15 steel thermal diffusion coefficient and coefficient of heat conductivity result that Fig. 4 measures for the present invention;
TP3471 steel thermal diffusion coefficient and coefficient of heat conductivity result that Fig. 5 measures for the present invention;
Fig. 6 is the thermal diffusion coefficient and the coefficient of heat conductivity result of 403 steel of the present invention's mensuration
Five, embodiment
The present invention adopts the LFA427 laser heat conducting instrument, comprise the sample chamber, the sample chamber is by outer cover 1, sample 2, alundum tube 3 and sample holder 4 are formed, between outer cover 1 and sample 2, ring-shaped pottery pad 5 is housed, its structural representation as shown in Figure 2, the external diameter φ 1=18～20mm of ring-shaped pottery pad 5, internal diameter φ 2=9～10mm, high h=0.5～2mm, material adopts zirconia, aluminium oxide, calcium oxide, in magnesium oxide and the composite oxides thereof one or more, in use, the ring-shaped pottery pad is placed between sample and silit (or graphite) outer cover, its placement location as shown in Figure 1.
Utilize the LFA427 laser heat conducting instrument to test thermal diffusion coefficient and the coefficient of heat conductivity of metal 20CrMnTi, its test result such as Fig. 3.
Add the ceramic gasket method and measured the thermal diffusion coefficient and the coefficient of heat conductivity of GCr15 ferrous materials, the results are shown in Figure 4.
Thermal diffusion and coefficient of heat conductivity the results are shown in Figure 5 with variation of temperature when utilization added ceramic gasket method test metal TP3471-1 high temperature on the LFA427 laser heat conducting instrument.
Use the elevated temperature heat diffusion and the coefficient of heat conductivity of 403 metals of LFA427 laser heat conducting instrument test, the results are shown in Figure 6.
Claims (2)
1. laser heat conducting instrument comprises the sample chamber, and the sample chamber is made up of outer cover (1), sample (2), alundum tube (3) and sample holder (4), it is characterized in that: between outer cover (1) and the sample (2) ring-shaped pottery pad (5) is housed.
2. laser heat conducting instrument according to claim 1 is characterized in that: the material of ring-shaped pottery pad (5) adopts one or more in zirconia, aluminium oxide, calcium oxide, magnesium oxide and the composite oxides thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101868721A CN101158660A (en) | 2007-11-21 | 2007-11-21 | Laser heat conducting instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101868721A CN101158660A (en) | 2007-11-21 | 2007-11-21 | Laser heat conducting instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101158660A true CN101158660A (en) | 2008-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101868721A Pending CN101158660A (en) | 2007-11-21 | 2007-11-21 | Laser heat conducting instrument |
Country Status (1)
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| CN (1) | CN101158660A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929968B (en) * | 2009-10-30 | 2012-07-18 | 中国计量科学研究院 | Device for measuring thermal diffusivity |
| CN103196943A (en) * | 2013-02-28 | 2013-07-10 | 胡增荣 | Test apparatus and test method for heat insulation performance of honeycomb panel |
| CN104535607A (en) * | 2014-12-04 | 2015-04-22 | 上海卫星装备研究所 | Method for semiquantitative rapid measurement of material thermal diffusion performance |
| CN106053530A (en) * | 2016-08-09 | 2016-10-26 | 武汉钢铁股份有限公司 | Calculation method of thermal conductivity coefficient of refractory material |
| CN109283221A (en) * | 2018-11-21 | 2019-01-29 | 芜湖市元奎新材料科技有限公司 | The measuring method of fire proofing material thermal conductivity in a kind of high temperature |
| CN114577843A (en) * | 2022-01-17 | 2022-06-03 | 中国科学院合肥物质科学研究院 | Sample clamp for LFA series laser thermal conductivity instrument and application method thereof |
| CN114674869A (en) * | 2022-04-06 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for testing heat conductivity coefficient |
-
2007
- 2007-11-21 CN CNA2007101868721A patent/CN101158660A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929968B (en) * | 2009-10-30 | 2012-07-18 | 中国计量科学研究院 | Device for measuring thermal diffusivity |
| CN103196943A (en) * | 2013-02-28 | 2013-07-10 | 胡增荣 | Test apparatus and test method for heat insulation performance of honeycomb panel |
| CN104535607A (en) * | 2014-12-04 | 2015-04-22 | 上海卫星装备研究所 | Method for semiquantitative rapid measurement of material thermal diffusion performance |
| CN104535607B (en) * | 2014-12-04 | 2017-12-22 | 上海卫星装备研究所 | A kind of method that sxemiquantitative quickly measures material heat diffusivity energy |
| CN106053530A (en) * | 2016-08-09 | 2016-10-26 | 武汉钢铁股份有限公司 | Calculation method of thermal conductivity coefficient of refractory material |
| CN106053530B (en) * | 2016-08-09 | 2018-11-30 | 武汉钢铁有限公司 | The calculation method of Refractory Thermal Conductivity |
| CN109283221A (en) * | 2018-11-21 | 2019-01-29 | 芜湖市元奎新材料科技有限公司 | The measuring method of fire proofing material thermal conductivity in a kind of high temperature |
| CN114577843A (en) * | 2022-01-17 | 2022-06-03 | 中国科学院合肥物质科学研究院 | Sample clamp for LFA series laser thermal conductivity instrument and application method thereof |
| CN114674869A (en) * | 2022-04-06 | 2022-06-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for testing heat conductivity coefficient |
| CN114674869B (en) * | 2022-04-06 | 2024-09-17 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for testing heat conductivity coefficient |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080409 |