Studies of Process Parameters on Scale up of Nd:YAG Nanopowder Synthesis by Sol-gel Process

Kiranmala Laishram; Rekha Mann; Neelam Malhan; Ravi Kumar Gupta

doi:10.14429/dsj.62.837

Kiranmala Laishram Laser Science & Technology Centre, Delhi
Rekha Mann Laser Science & Technology Centre, Delhi
Neelam Malhan Laser Science & Technology Centre, Delhi
Ravi Kumar Gupta Directorate of Public Interface, DRDO Bhawan, Delhi

DOI: https://doi.org/10.14429/dsj.62.837

Keywords: Phase-pure Nd, YAG, sol-gel process, nitrate-citrate sol, XRD, calcination

Abstract

Scale up of process from 6 g to 200 g batch for preparation of phase pure Neodymium doped Yttrium Aluminum Garnet (Nd:YAG) nanopowder by sol-gel process using nitrate-citrate route was carried out. Optimisation of process parameters was done to resolve problems associated with large batch such as evolution of large amount of acidic fumes, increased gelation and drying time and incomplete calcination. The problem of exhaust of excess acidic fumes with size scale up was handled by passing ammonia and optimized pH of the sol. Process of drying the sol was optimised for large batch size. On scaling up from 6 g to 200 g batch incomplete crystallization was observed on calcination under conditions optimized for 6 g batch. The causes of incomplete calcination with size scale up was identified and resolved to achieve completely crystalline particles in the range of ~25 nm to 50 nm.

Defence Science Journal, 2012, 62(1), pp.199-202, DOI:http://dx.doi.org/10.14429/dsj.62.837

Author Biographies

Kiranmala Laishram, Laser Science & Technology Centre, Delhi

Ms Kiranmala Laishram obtained her MSc (Physical Chemistry) from Manipur University in 2002. She is working as Scientist ‘C’ at Laser Science and Technology Centre (LASTEC), Delhi. Her areas of interest are material characterisation techniques, laser materials, and nanomaterial-synthesis and applications. She has published 22 research papers in the journals and conferences, and 5 technical reports.

Rekha Mann, Laser Science & Technology Centre, Delhi

Dr (Mrs) Rekha Mann obtained her MSc and MPhil (Organic Chemistry) from Kurukshetra University, and PhD (Applied Chemistry) from Delhi College of Engineering, Faculty of Technology,Delhi University in 2003. Presently she is working as Scientist ‘D’ at LASTEC, Delhi. Her areas of interest are nanomaterial synthesis and processing, laser materials, organic synthesis, and polymer materials. She has published 24 research papers in the journals and conferences, and 5 technical reports.

Neelam Malhan, Laser Science & Technology Centre, Delhi

Ms Neelam Malhan obtained her MSc (Physical Chemistry) from University of Delhi and MTech (Modern Methods for Chemical Analysis & Control) from IIT, Delhi in 1979. Presently she is working as Scientist ‘F’ at LASTEC, Delhi. Her areas of interest are: Development of high purity grade oxide materials & catalyst for laser applications, analytical techniques for material characterization, nanomaterial synthesis, ceramic processing & sintering, polycrystalline laser ceramics Nd-doped YAG& Nd-doped Y ttria for SSL applications. She has published 20 research papers in the journals and conferences.

Ravi Kumar Gupta, Directorate of Public Interface, DRDO Bhawan, Delhi

Mr Ravi Kumar Gupta obtained his MSc (Organic Chemistry) from Delhi University in 1978, DIIT (High Polymers & Rubbers) from IIT Kharagpur in 1979. Presently, he is working as Scientist ‘G’ at Directorate of Public Interface, DRDO Bhawan. His areas of interest are: Heat-resistant polymers, polymers, organic and polymeric laser materials, polycrystalline laser materials, and synthesis and characterisation of nanomaterials.

References

Jiang, L.; Y usong, W.; Y ubai, P.; Wenbin, L.; Liping H. & Jingkun G. Fabrication, microstructure and properties of highly transparent Nd:YAG laser ceramics. Optical Materials, 2008, 31(1), 6-17.

Akio, I.; Toshiyuki, K.; Kiichiro, K. & Kunio, Y. Fabrication and optical properties of high-performance polycrystalline Nd:YAG ceramics for solid-state lasers. J. Am. Ceram. Soc., 1995, 78 (4), 1033-040.

Robert, F.; Dariusz, H.; Witold, L.; Wieslaw, S.; Hubert, M.; Ewa, G.; Stanislaw, G. & Piotr, M. Method of preparation and structural properties of transparent YAG nanoceramics. Optical Materials, 2007, 29(10), 1252-257.

Johanne, M. Synthesis of Y d:Y2O3 nanoparticles and fabrication of transparent polycrystalline yttria ceramics. Lulea University of technology, France. 2005 (PhD Thesis).

Vaqueiro P, Lopez-Quintela MA. Influence of complexing agents and pH on Y ttrium?Iron garnet synthesized by the sol?gel method. Chemistry of Materials, 1997, 9(12),2836-841.

Hofmeister AM, Campbell KR. Infrared spectroscopy of Yttrium Aluminum, Yttrium Gallium, and Yttrium Iron garnets. J. Appl. Phys., 1992, 72(2), 638-46.

Culity, B.D. & Stock, S.R. Elements of X-ray diffraction. Ed 2nd, Addition-Wesley, MA, London. 1978

JCPDS 33-40.

Kiranmala, L.; Rekha, M. & Neelam, M. Novel microwave assisted synthesis of highly doped phase pure Nd:YAG nanopowder. Mater. Sci. Poland, 2012, 29(3), 184-88.

Caponeti, E.; Saladino, M.L.; Serra, F. & Enzo, S. Coprecipitation synthesis of Nd:YAG nano-powders: The effect of Nd dopant addition with thermal treatment. J. Mater. Sci., 2007, 42, 4418-27.

Studies of Process Parameters on Scale up of Nd:YAG Nanopowder Synthesis by Sol-gel Process

Abstract

Author Biographies

References

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