caa a22 4500 46323104X CHVBK 20180405153242.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10853-006-0737-9 doi (NATIONALLICENCE)springer-10.1007/s10853-006-0737-9 Nanostructured Al2O3-ZrO2 composite synthesized by sol-gel technique: powder processing and microstructure [Elektronische Daten] [Debasish Sarkar, Deepak Mohapatra, Sambarta Ray, Santanu Bhattacharyya, Sukumar Adak, Niren Mitra] Al2O3-ZrO2 composite gel powder was prepared by sol-gel route. The gel precursor compositions were preferred to achieve yield of 5-15mol% zirconia after calcination of respective powders. The precursor gel was characterized by Differential Thermal Analysis (DTA)/Thermo Gravimetric (TG), IR and X-ray Diffraction study (XRD). The analysis reveal the gel contained pseudoboehmite and amorphous Zr(OH)4, which was decomposed in three and two stages respectively. The phase transformation of alumina during calcination followed the sequence of pseudoboehmite → bayerite→boehmite→γ-Al2O3→θ-Al2O3→α-Al2O3, while that of ZrO2 follows amorphous ZrO2→t-ZrO2→(t+m) ZrO2. Fourier Transform Infrared Spectroscopy (FTIR) studies showed that the number of M-OH and M-O bond increases with zirconia due to a change in the cationic charge of the composite powder. Transmission Electron Microscopy (TEM) photograph of calcined powder exhibited the presence of dispersed as well as agglomerated nano sized spherical particles. SEM and Electron Probe Microscope Analysis (EPMA) confirmed the near uniform distribution of zirconia particles in the alumina matrix. Springer Science+Business Media, LLC, 2006 Sarkar Debasish Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut Mohapatra Deepak Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut Ray Sambarta Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut Bhattacharyya Santanu Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut Adak Sukumar Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut Mitra Niren Department of Chemical Technology, University of Calcutta, 92, APC Road, 700009, Kolkata, West Bengal, India aut Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/5(2007-03-01), 1847-1855 0022-2461 42:5<1847 2007 42 10853 https://doi.org/10.1007/s10853-006-0737-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-0737-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sarkar Debasish Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut NATIONALLICENCE 700 1- Mohapatra Deepak Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut NATIONALLICENCE 700 1- Ray Sambarta Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut NATIONALLICENCE 700 1- Bhattacharyya Santanu Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut NATIONALLICENCE 700 1- Adak Sukumar Department of Ceramic Engineering, National Institute of Technology, 769008, Rourkela, Orissa, India aut NATIONALLICENCE 700 1- Mitra Niren Department of Chemical Technology, University of Calcutta, 92, APC Road, 700009, Kolkata, West Bengal, India aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/5(2007-03-01), 1847-1855 0022-2461 42:5<1847 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer