IJSRSET calls volunteers interested to contribute towards the scientific development in the field of Science, Engineering and Technology

Home > IJSRSET3406                                                     


Lanthanum Phosphate Based Ceramic Composite Coatings for High Emissivity Applications

Authors(2):

Aniantony, Ananthakumar Solaiappan
  • Abstract
  • Authors
  • Keywords
  • References
  • Details
Lanthanum phosphate, a soft ceramic material, with low thermal conductivity, high melting point and high temperature phase stability is a good candidate for getting a tough ceramic coating for use at high temperatures. In this work, a novel high emissivity ceramic coating based on lanthanum phosphate ceramic pigment was developed. Initially, a black pigment based on lanthanum phosphate with an L* value of 34.71 was obtained through solid state reaction by suitable pigment addition and subsequent high temperature firing. This pigment was then brush painted on to alumina and stainless steel substrates using aluminium phosphate and sodium silicate inorganic binders and fired at suitable temperatures for setting of coatings. The average spectral emissivities of the coatings in the wavelength range 0.7?m to 2.5?m was above 0.9. The emissivity variation with porosity of substrate, temperature, roughness of coating and viscosity of binders was studied for getting an optimised coating with high emissivity.

Aniantony, Ananthakumar Solaiappan

Lanthanum Phosphate, Thermal Conductivity, Aluminium Phosphate, Orthophosphoric Acid, LaPO4, NH3, Aluminum and Alumina

  1. V. D. Kingery, Introduction to ceramics. Cambridge, Massachusetts: .John Wiley & Sons, 1975.
  2. W. D. Callister, Fundamentals of Materials Science and Engineering. United States of America: John Wiley & Sons, 2001.
  3. Simmons et. al.: Thermal Protective Coating,US Patent, July2006.
  4. Kessman et. al. :Zirconia sol-gel coatings on alumina-silica refractory material for improved corrosion resistance,Surface and Coatings Technology, Vol. 204, 2009, pp. 477-483.
  5. Sudreet. al. : Monazite BasedThermal Barrier Coating, US Patent,March 2005.
  6. K. Rajesh et. al. : Synthesis of nanocrystalline lanthanum phosphate for low temperature densification to monazite ceramics, Materials Letters,Vol. 58, 2004,pp. 1687-169.
  7. Mahadiket. al. : Double layerSiO2/Al2O3 high emissivity coatings on stainless steel substrates using simple spray deposition system, Applied Surface Science, Vol. 299, 2014,pp. 6-11.
  8. Kiomarsipouret.al. : Improvement of spacecraft white thermal control coatings using the new synthesized Zn-MCM-41 pigment,Dyes and Pigments, Vol. 96, 2013, pp. 403-406.
  9. Cockeram et. al. : The development and testing of emissivity enhancement coatings for thermophotovoltaic radiator applications, Thin Solid Films, Vol. 355-356, 1999, pp. 17-25.
  10. Pal et. al. :Spectrally selective absorber coating from transition metal complex for efficient photothermal conversion, Journal of Materials Science, Vol. 48, 1999, pp. 8268-8276.
  11. Fend et. al. : Two novel high porosity materials as volumetric receivers for concentrated solar radiation, Solar energy Materials and Solar Cells, Vol. 84, 2004, pp. 291-304.
  12. Sankar et. al. : Room temperature synthesis of high temperature stable lanthanum phosphate–yttria nano composite, Materials Research Bulletin, Vol. 47, 2012, pp. 1835-1837.
  13. Sujith et. al. : Porous to dense LaPO4 sintered ceramics for advanced refractories, Ceramics International, Vol. 40, 2014, pp. 15121-15129.
  14. Wang et. al. : Properties and microstructure of machinable Al2O3/LaPO4ceramic composites, Ceramics International, Vol. 29, 2003, pp. 19-25.
  15. Sankar et. al. :Rare earth phosphate based non reactive and non-wettable surface for molten metals, WO patent, March 2016.
  16. Shioyaet. al. : High emissivity refractory coating, US patent, September 1984.
  17. Holcombeet. al. : High emissivity coating, US patent, September 1997.
  18. Huanget. al. : Enhanced spectral emissivity of CeO2 coating with cauliflower-like microstructure, Applied Surface Science, Vol. 259, 2012, pp. 301-305.
  19. Huang et. al. : Highly enhanced infrared spectral emissivity of porous CeO2 coating, Materials Letters, Vol. 85, 2012, pp. 57-60.
  20. Huang et. al. : Enhanced infrared emissivity of CeO2 coatings by La doping, Applied Surface Science , Vol. 280, 2013, pp. 605-609.

Publication Details

Published in : Volume 3 | Issue 4 | March-April - 2017
Date of Publication Print ISSN Online ISSN
2017-04-30 2395-1990 2394-4099
Page(s) Manuscript Number   Publisher
26-37 IJSRSET3406   Technoscience Academy

Cite This Article

Aniantony, Ananthakumar Solaiappan, "Lanthanum Phosphate Based Ceramic Composite Coatings for High Emissivity Applications", International Journal of Scientific Research in Science, Engineering and Technology(IJSRSET), Print ISSN : 2395-1990, Online ISSN : 2394-4099, Volume 3, Issue 4, pp.26-37, March-April-2017.
URL : http://ijsrset.com/IJSRSET3406.php

IJSRSET Xplore

Subscribe

Conferences

National Conference on Advances in Mechanical Engineering 2017(NCAME 2017)

National Conference on Emerging Trends in Civil Engineering 2017( NCETCE 2017)