Thermal Emittance of \(\hbox {La}_{0.7}\hbox {Ca}_{0.3-x}\hbox {K}_x\hbox {MnO}_3\) Coatings on Aluminum Substrate

  • Desong Fan
  • Si Sun
  • Li Guo


A novel thermal control coating was presented based on the thermochromism of manganite. The pigment of K-doped manganite nanoparticles was dispersed into polymer matrix to prepare the coating with curing below 200 \(^{\circ }\)C. The nanoparticles size mainly distributes around 100–200 nm, and it shows a comparable stoichiometric ratio. The phase transition of the nanoparticles was observed from ferromagnetic metallic to paramagnetic insulator state. With increasing K doping level, the phase transition temperature increases, achieving controllable adjustment. Coating surface with and without pore defect was obtained by different polymer matrix. A sharp emittance variation was observed with increasing temperature in K-doped coating. The variation magnitude of emittance is up to 0.46, which is attractive to space thermal control. It is suggested that the pigment content of 50 wt% is sufficient to realize a large emittance variation.


K-doped manganite Thermochromic coating Variable emittance 



This work is sponsored by the National Natural Science Foundation of China (Grant No. 51406086), the Natural Science Foundation of Jiangsu Province (Grant No. BK20140783), and the Six Talent Peaks Project in Jiangsu Province (No. XNY-031).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.MIIT Key Laboratory of Thermal Control of Electronic Equipment, School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjingChina
  2. 2.Nanjing Wuzhou Refrigeration Group Co. Ltd.NanjingChina

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