Open Access Open Access  Restricted Access Subscription or Fee Access

Preparation and Characterization of Lanthanum Doped Calcium Aluminate Nanophosphor (CaAl2O4: La) by Sol-Gel Method

M. Freeda, G. Suresh


Lanthanum doped calcium aluminate nanophosphor (CaAl2O4: La) was prepared by sol-gel method. Characterizations such as XRD, SEM, EDAX and PL were done. Monoclinic structure was confirmed by the XRD analysis; the particle size was found to be 27 nm and is determined by (Williamson and Hall plot) W-H plot method. It shows that the particles were of small granular structure, and were interlinked with each other, lead to the formation of bigger particles. Also it is found that some irregular aggregations were formed in the image. PL emission was obtained at 390, 520, 790 nm corresponding to blue, green and IR region of the spectrum for 360 nm excitation.


XRD, SEM, EDAX, PL, W-H plot, sol-gel method

Full Text:



Pallila FC, Levine AK, Tomkus MR. J Electrochem Soc. 1968; 115: 642p.

Blasse G, Wanmaker WL, Bril A.Philips Res Repts. 1968; 23: 201p.

Tanabe S, Kang J, Hanada T, et al. J Non-Cryst Solids. 1998; 170: 239p.

Aiyu Z, Ping Y, Yongqiang C, et al.Adv Mat Lett. 2011; 2(5): 322p.

Yerpude AN, Dhoble SJ.J. Lumin. 2012; 132: 1781p.

Katsumata T, Sasajima K, NabaeT, et al.Journal of Amer Ceram Soc. 1998; 81: 413p.

Aizawa H,Katsumata T, Takahashi J,et al. 1972; 5: 87p.

Jutsel T, Nikol H, Ronda C. New Developments in the Field of Luminescent Materials for Lighting and Displays. AngewChemInt Ed. 1998; 37:3084p.

Murayama Y, Takeuchi N, Aoki Y, et al. Phosphorescent Phosphor.US Patent 5,424,006; 1995.

Park YJ, Kim YJ. Effects of Crystal Structures on Luminescent Properties of EuDoped Ca-Al-O Systems. Ceram Int. 2008; 34(4): 1109p.

Chen XY, Ma C, Li XX, et al. Novel Necklase-Like MAl2O4: Eu2+, Dy3+ (M=Sr, Ba, Ca) Phosphors via a CTAB-Assisted Solution Phase Synthesis and Post Annealing Approach. J Electrochem Soc. 2009; 113(7): 2685p.

Jia D, Yen WM. Trapping Mechanism Associated with Electron Delocalization and Tunneling of CaAl2O4:Ce3+, a Persistent Phosphor. J Electrochem Soc. 2003; 150(3): H61p.

Schneider SJ, Roth RS, Waring JL. Solid State Reactions Involving Oxide of Trivalent Cations. J Res Nat Bur Standards. 1961; 65A(4): 345p.

Yiqing L, Yongxiang L, Yohong X,et al. SrAl2O4:Eu2+, Dy3+ Phosphors Derived from a New Sol-Gel Route. Microelectron J.2004; 35: 379p.

Yingliang L, Dexiong F, Peihui Y. Preparation of Phosphors MAl2O4:Eu2+ (M=Ca, Sr, Ba) by Microwave Heating Technique and their Phosphorescence. Rare Metals. 2000; 19(4): 297p.

Kinsman KM,McKittrick J,Slizky E,et al. Phase Development and Luminescence in Chromium Doped Yttrium Aluminum Garnet (YAG:Cr) Phosphors. J Am Ceram Soc. 1994; 77(11): 2866p.

Xinguang R,Jiwu M. The Preparation of Electric Arc Method and Spectral Analysis on Long Persistence Luminescent Chinaware of Sr Al2O4:Eu2+.SpectroscSpecir Anal. 2002; 20(3): 268p.

Kutty TRN,Jannathan R. Luminescence of Eu2+ in Strontium Aluminates Prepared by the Hydro-Thermal Method. Mater Res Bull. 1990; 25: 1355p.

Zhang Y,Stangle GC. Preparation of Fine Multi-Component Oxide Ceramic Powder by a Combustion Synthesis Process. J Mater Res. 1994; 9(8): 1997p.

Shea LE,McKittrick J, Lope OA. Synthesis of Red Emitting, Small Particle Size Luminescent Oxides Using an Optimized Combustion Process.J Am Ceram Soc. 1996; 79(12): 3257p.

Kurihara LK, Suib SL, Sol-Gel Synthesis of Ternary Metal Oxides. 1. Synthesis and Characterization of MAl2O4 (M= Mg, Ni, Co, Cu, Fe, Zn, Mn, Cd, Ca, Hg, Sr, and Ba) and Lead Aluminum Oxide (Pb2Al2O5). Chem Mater. 1993; 5: 609p.


  • There are currently no refbacks.