future applications of La1-xSrxMnO3 compounds for thermal control of spacecraft
- Paper number
IAC-08.C2.5.11
- Author
Dr. chunhua wu, China
- Year
2008
- Abstract
The next generation materials for thermal control of spacecraft is variable emittance materials which can change their emittance under the action of small applied voltage or response to temperature change automatically. A variable emittance radiator using La1-xSrxMnO3(LMSO) compounds is in development. The LSMO compounds material undergoes a metal to insulator transition at room temperature and this allows the infrared emissivity of the devices to change from low to high as the temperature is increased from about 173K to 375K. As a result of this, spacecraft can automatically adjust the emissive heat transfer from the spacecraft into deep space in response to temperature, and can also avoid large temperature fluctuation for keeping the temperature of elements within the allowable limits with no power consumption. This is very different from conventional thermal control coatings which has a unchanging thermal properties .This paper mainly summarize the physical properties of LSMO ,commonly used preparation methods, progress of the LSMO smart radiation device, the disadvantage for applications need to be improve ,and tentative strategy for phase-change amplitude modulation of LSMO near room temperature were discussed also.
- Abstract document
- Manuscript document
IAC-08.C2.5.11.pdf (🔒 authorized access only).
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