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Findings from Federal University in the Area of Ceramics Described (TiO2 nanoparticulated LZSA glass-ceramic matrix composites)

July 8, 2014



By a News Reporter-Staff News Editor at Journal of Technology -- Data detailed on Ceramics have been presented. According to news reporting originating in Florianopolis, Brazil, by VerticalNews journalists, research stated, "In this work, TiO2 (0-50 vol%) nanoparticles (25 nm) were added to a 11.7Li(2)o 12.6ZrO(2). 68.6SiO(2). 7.1Al(2)O(3), LZSA (4 mu m) glass-ceramic matrix to prepare composites in order to investigate the influence of TiO2 on the sinterability, crystallinity and some properties to obtain information to design materials for low temperature co-fired ceramics (LTCCs) applications. The sintered composites (700-1000 degrees C/30 min) with relative densities between 95% and 98%, showed beta-podumene,TiO2 and Li2TiSiO5 as main crystalline phases."

The news reporters obtained a quote from the research from Federal University, "The maximum bending strength (235 +/- 84 MPa) was achieved for composites with 40% TiO2 sintered at 1000 degrees C/30 min. The coefficient of thermal expansion increased linearly with the concentration of TiO2, i.e., 3.5 x 10(-6) C-1 for 0% TiO2 and 9.5 x 10(-6) C-1 to 100% TiO2. The values of thermal conductivity were low and increased with the increase of the volumetric fraction of TiO2, reaching a maximum (3.30 W/mK) for samples (40% TiO2) sintered at 1000 degrees C/30 min."

According to the news reporters, the research concluded: "The measurements of electrical conductivity indicate that the obtained materials are electrical insulators (similar to 10(-10) S cm(-1))."

For more information on this research see: TiO2 nanoparticulated LZSA glass-ceramic matrix composites. Ceramics International, 2014;40(7):9535-9540. Ceramics International can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England. (Elsevier - www.elsevier.com; Ceramics International - www.elsevier.com/wps/product/cws_home/405926)

Our news correspondents report that additional information may be obtained by contacting F.R. Cesconeto, Fed Univ Santa Catarina UFSC, Dept. of Chem Engn EQA, BR-88040900 Florianopolis, SC, Brazil. Additional authors for this research include S. Arcaro, F. Raupp-Pereira, J.B.R. Neto, D. Hotza and A.P. de Oliveira.

Keywords for this news article include: Brazil, Ceramics, Florianopolis, South America

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Source: Journal of Technology


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