Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics
2007
Authors
Ivetić, Tamara B.Nikolić, Maria Vesna P.
Pavlović, Vladimir
Nikolić, Pantelija M.
Ristić, Momčilo M.
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In this paper the changes that occured in differently activated ZnO-SnO(2) and sintered samples were investigated using photoacoustic spectroscopy. ZnO and SnO(2) powders, mixed in the molar ratio 2:1, were mechanically activated in a planetary ball mill for 10-160 min. The mixtures were pressed and isothermally sintered at 1300 degrees C for two hours. X-ray diffraction analysis of the obtained sintered samples was performed in order to investigate changes of the phase composition and confirmed only the presence of a pure zinc stannate (Zn(2)SnO(4)) phase in all the sintered samples as a result of the solid state reaction and reaction sintering between the starting ZnO and SnO(2) powders. The microstructure of the sintered samples was examined by scanning electron microscopy and showed that mechanical activation leads to the formation of a structure with reduced particle size which accelerates spinel formation. Grain growth of the spinel phase slows down the densification process and ...together with the agglomerates formed during mechanical activation causes the appearance of a porous microstructure. The photoacoustic (PA) phase and amplitude spectra of the sintered samples were recorded as a function of the chopped frequency of the laser beam used (red laser with a power of 25 mW, lambda = 632 nm) in a thermal-transmission detection configuration. PA experimental data were analyzed using the Rosenzweig-Gersho thermal-piston model, which enabled determination of the thermal diffusivity, D(T) (m(2) s(-1)), diffusion coefficient of the minority free carriers D (m(2)s(-1)) and the optical absorption coefficient (m(-1)). The detected differences of the measured thermal-electrical properties of the obtained Zn(2)SnO(4) ceramics indicate changes in the material induced by the different preparation procedure of the starting powders before the sintering process.
Keywords:
mechanical activation / sintering / zinc stannate / photoacoustic spectroscopy / thermal diffusivitySource:
HEMIJSKA INDUSTRIJA, 2007, 61, 3, 142-146Publisher:
- Savez hemijskih inženjera, Beograd
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Poljoprivredni fakultetTY - CONF AU - Ivetić, Tamara B. AU - Nikolić, Maria Vesna P. AU - Pavlović, Vladimir AU - Nikolić, Pantelija M. AU - Ristić, Momčilo M. PY - 2007 UR - http://aspace.agrif.bg.ac.rs/handle/123456789/1586 AB - In this paper the changes that occured in differently activated ZnO-SnO(2) and sintered samples were investigated using photoacoustic spectroscopy. ZnO and SnO(2) powders, mixed in the molar ratio 2:1, were mechanically activated in a planetary ball mill for 10-160 min. The mixtures were pressed and isothermally sintered at 1300 degrees C for two hours. X-ray diffraction analysis of the obtained sintered samples was performed in order to investigate changes of the phase composition and confirmed only the presence of a pure zinc stannate (Zn(2)SnO(4)) phase in all the sintered samples as a result of the solid state reaction and reaction sintering between the starting ZnO and SnO(2) powders. The microstructure of the sintered samples was examined by scanning electron microscopy and showed that mechanical activation leads to the formation of a structure with reduced particle size which accelerates spinel formation. Grain growth of the spinel phase slows down the densification process and together with the agglomerates formed during mechanical activation causes the appearance of a porous microstructure. The photoacoustic (PA) phase and amplitude spectra of the sintered samples were recorded as a function of the chopped frequency of the laser beam used (red laser with a power of 25 mW, lambda = 632 nm) in a thermal-transmission detection configuration. PA experimental data were analyzed using the Rosenzweig-Gersho thermal-piston model, which enabled determination of the thermal diffusivity, D(T) (m(2) s(-1)), diffusion coefficient of the minority free carriers D (m(2)s(-1)) and the optical absorption coefficient (m(-1)). The detected differences of the measured thermal-electrical properties of the obtained Zn(2)SnO(4) ceramics indicate changes in the material induced by the different preparation procedure of the starting powders before the sintering process. PB - Savez hemijskih inženjera, Beograd C3 - HEMIJSKA INDUSTRIJA T1 - Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics EP - 146 IS - 3 SP - 142 VL - 61 DO - 10.2298/HEMIND0703142I ER -
@conference{ author = "Ivetić, Tamara B. and Nikolić, Maria Vesna P. and Pavlović, Vladimir and Nikolić, Pantelija M. and Ristić, Momčilo M.", year = "2007", abstract = "In this paper the changes that occured in differently activated ZnO-SnO(2) and sintered samples were investigated using photoacoustic spectroscopy. ZnO and SnO(2) powders, mixed in the molar ratio 2:1, were mechanically activated in a planetary ball mill for 10-160 min. The mixtures were pressed and isothermally sintered at 1300 degrees C for two hours. X-ray diffraction analysis of the obtained sintered samples was performed in order to investigate changes of the phase composition and confirmed only the presence of a pure zinc stannate (Zn(2)SnO(4)) phase in all the sintered samples as a result of the solid state reaction and reaction sintering between the starting ZnO and SnO(2) powders. The microstructure of the sintered samples was examined by scanning electron microscopy and showed that mechanical activation leads to the formation of a structure with reduced particle size which accelerates spinel formation. Grain growth of the spinel phase slows down the densification process and together with the agglomerates formed during mechanical activation causes the appearance of a porous microstructure. The photoacoustic (PA) phase and amplitude spectra of the sintered samples were recorded as a function of the chopped frequency of the laser beam used (red laser with a power of 25 mW, lambda = 632 nm) in a thermal-transmission detection configuration. PA experimental data were analyzed using the Rosenzweig-Gersho thermal-piston model, which enabled determination of the thermal diffusivity, D(T) (m(2) s(-1)), diffusion coefficient of the minority free carriers D (m(2)s(-1)) and the optical absorption coefficient (m(-1)). The detected differences of the measured thermal-electrical properties of the obtained Zn(2)SnO(4) ceramics indicate changes in the material induced by the different preparation procedure of the starting powders before the sintering process.", publisher = "Savez hemijskih inženjera, Beograd", journal = "HEMIJSKA INDUSTRIJA", title = "Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics", pages = "146-142", number = "3", volume = "61", doi = "10.2298/HEMIND0703142I" }
Ivetić, T. B., Nikolić, M. V. P., Pavlović, V., Nikolić, P. M.,& Ristić, M. M.. (2007). Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics. in HEMIJSKA INDUSTRIJA Savez hemijskih inženjera, Beograd., 61(3), 142-146. https://doi.org/10.2298/HEMIND0703142I
Ivetić TB, Nikolić MVP, Pavlović V, Nikolić PM, Ristić MM. Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics. in HEMIJSKA INDUSTRIJA. 2007;61(3):142-146. doi:10.2298/HEMIND0703142I .
Ivetić, Tamara B., Nikolić, Maria Vesna P., Pavlović, Vladimir, Nikolić, Pantelija M., Ristić, Momčilo M., "Photoacoustic spectroscopy investigation of sintered zinc-tin-oxide ceramics" in HEMIJSKA INDUSTRIJA, 61, no. 3 (2007):142-146, https://doi.org/10.2298/HEMIND0703142I . .