Journal of Thermal Analysis and Calorimetry

, Volume 110, Issue 1, pp 497–502 | Cite as

The thermal behavior of some polymeric precursors used in CaAl12O19 synthesis

  • I. Lazău
  • C. Păcurariu
  • R. Băbuţă


CaAl12O19 was synthesised using three different precursors: (a) a polyesteric type precursor resulted from the traditional Pechini method; (b) a polyesteric type precursor resulted from the reaction between citric acid and calcium and aluminum nitrates; and (c) a polymeric type precursor resulted from the reaction between acrylic acid and calcium an aluminum nitrates. The thermal behavior of the three precursors used in the CaAl12O19 synthesis was monitored to underline the thermal effects associated to the CaAl12O19 formation. Thermal analyses performed on precursors do not reveal clear differences regarding the thermal effects assigned to calcium aluminates formation, at temperatures over 800 °C. In contrast, thermal analysis of samples pre-fired at 200 °C, and especially at 600 °C, show clear differences between samples obtained in different ways. It is noted that in samples obtained from acrylic acid and nitrates, and citric acid and nitrates, CA6 is practically single phase after calcination at 1,200 °C. However, in the sample obtained from citric acid, ethylene glycol, and nitrates, calcined at 1,200 °C, CA6 is present along with CA2 and α-Al2O3.


Calcium aluminates Polymeric precursor method Thermal analysis 



This work was partially supported by the strategic Grant POSDRU/88/1.5/S/50783, Project ID50783 (2009), co-financed by the European Social Fund—Investing in People, within the Sectoral Operational Programme Human Resources Development 2007–2013.


  1. 1.
    Ianoş R, Lazău I, Păcurariu C, Barvinschi P. Peculiarities of CaO·6Al2O3 formation by using low-temperature combustion synthesis. Eur J Inorg Chem. 2008;6:925–30.Google Scholar
  2. 2.
    Altay A, Carter CB, Arslan I, Gülgün MA. Crystallization of CaAl4O7 and CaAl12O19 powders. Philos Mag. 2009;89(7):605–21.CrossRefGoogle Scholar
  3. 3.
    Nagaoka T, Tsugoshi T, Hotta Y, Yasuoka M, Watari K. Forming and sintering of porous calcium-hexaaluminate ceramics with hydraulic alumina. J Mater Sci. 2006;41:7401–5.CrossRefGoogle Scholar
  4. 4.
    Singh VK, Sharma KK. Low-temperature synthesis of calcium hexa-aluminate. J Am Ceram Soc. 2002;84(4):769–72.Google Scholar
  5. 5.
    Chandradass J, Bae DS, Kim KH. Synthesis of calcium hexaaluminate (CaAl12O19) via reverse micelle process. J Non Cryst Solids. 2009;335:2429–32.CrossRefGoogle Scholar
  6. 6.
    López-Delgado A, López FA, Gonzalo-Delgado L, López-Andrés S, Alguacil FJ. Study by DTA/TG of the formation of calcium aluminate obtained from aluminium hazardous waste. J Therm Anal Calorim. 2010;99:999–1004.CrossRefGoogle Scholar
  7. 7.
    Singh V, Gundu Rao TK, Zhu JJ. Synthesis, photoluminescence, thermoluminescence and electron spin resonance investigation of CaAl12O19:Eu phosphor. J Lumin. 2007;126:1–6.CrossRefGoogle Scholar
  8. 8.
    Cinibulk MK. Effect of divalent cations on the synthesis of citrate-gel-derived lanthanum hexaaluminate powders and films. J Mater Res. 1999;14(9):3581–93.CrossRefGoogle Scholar
  9. 9.
    Asmi D, Low IM. Physical and mechanical characteristics of in situ alumina/calcium hexaaluminate composites. J Mater Sci Lett. 1998;17:1735–8.CrossRefGoogle Scholar
  10. 10.
    Vishista K, Gnanam FD. Sol–gel synthesis and characterization of alumina–calcium hexaaluminate composites. J Am Ceram Soc. 2005;88(5):1175–9.CrossRefGoogle Scholar
  11. 11.
    Costa G, Ribeiro MJ, Hajjaji W, Seabra MP, Labrincha JA, Dondi M, Cruciani G. Ni-doped hibonite (CaAl12O19): a new turquoise blue ceramic pigment. J Eur Ceram Soc. 2009;29:2671–8.CrossRefGoogle Scholar
  12. 12.
    Murata T, Tanoue T, Iwasaki M, Morinaga K, Hase T. Fluorescence properties of Mn4+ in CaAl12O19 compounds as red-emitting phosphor for white LED. J Lumin. 2005;114:207–12.CrossRefGoogle Scholar
  13. 13.
    Brik MG, Pan YX, Liu GK. – Spectroscopic and crystal field analysis of adsorption and photoluminescence properties of red phosphor CaAl12O19:Mn4+ modified by MgO. J Alloys Compd. 2011;509:1452–6.CrossRefGoogle Scholar
  14. 14.
    Pan YX, Liu GK. Influence of Mg2+ on luminescence efficiency and charge compensating mechanism in phosphor CaAl12O19:Mn4+. J Lumin. 2010. doi: 10.1016/j.jlumi.2010.11.014.
  15. 15.
    Nie ZG, Zhang JH, Zhang X, Lü SZ, Ren XG, Zhang GB, Wang XJ. Photon cascade luminescence in CaAl12O19:Pr, Cr. J Sol State Chem. 2007;180:2933–41.CrossRefGoogle Scholar
  16. 16.
    Banerjee S, Kumar A, Sujatha Devi P. Preparation of nanoparticles of oxides by the citrate–nitrate process. J Therm Anal Calorim. 2011;104:859–67.CrossRefGoogle Scholar
  17. 17.
    Singh RK, Yadav A, Narayan A, Chandra M, Verma RK. Thermal, XRD, and magnetization studies on ZnAl2O4 and NiAl2O4 spinels, synthesized by citrate precursor method and annealed at 450 and 650 °C. J Therm Anal Calorim. 2012;107:205–10.CrossRefGoogle Scholar
  18. 18.
    Bernardi MIB, Araújo VD, Mesquita A, Frigo GJM, Maia LJQ. Thermal, structural and optical properties of Al2CoO4-crocoite composite nanoparticles used as pigments. J Therm Anal Calorim. 2009;97:923–8.CrossRefGoogle Scholar
  19. 19.
    Da Silva MFP, De Souza Carvalho FM, Da Silva Martins T, De Abreu Fantini MC, Isolani PC. The role of citrate precursors on the morphology of lanthanide oxides obtained by thermal decomposition. J Therm Anal Calorim. 2010;99:385–90.CrossRefGoogle Scholar
  20. 20.
    Yuan X, Xu Y, He Y. Synthesis of Ca3Al2O6 via citric acid precursor. Mater Sci Eng A. 2007;447:142–5.CrossRefGoogle Scholar
  21. 21.
    Lazău I, Păcurariu C, Băbuţă R. The use of thermal analysis in the study of Ca3Al2O6 formation by the polymeric precursor method. J Therm Anal Calorim. 2011;105(2):427–34.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  1. 1.Politehnica University of TimişoaraTimisoaraRomania

Personalised recommendations