Sutha, S. ; Sakthipandi, K. ; Rajendran, V. ; Palanivelu, R. ; Rani, Uma C. ; Jayakumar, T. ; Raj, Baldev (2012) Structural studies of nano silica employing on-line ultrasonic studies Phase Transitions: A Multinational Journal, 85 (7). pp. 565-576. ISSN 0141-1594
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Official URL: http://www.tandfonline.com/doi/abs/10.1080/0141159...
Related URL: http://dx.doi.org/10.1080/01411594.2011.648933
Abstract
Monodispersed, nano silica particles have been prepared by sol-gel hydrolysis and condensation of the metal alkoxide using pH buffer. The prepared particles are characterised by XRD, FTIR, BET, SEM, TEM measurements. The measurements reveal that the size and shape of silica particles depend on concentration of water. In addition, the ultrasonic longitudinal velocity and attenuation of the nano silica particles have been measured at a frequency of 5 MHz over a wide range of temperatures from 300 K to 1150 K in nano silica. The different structural transitions, such as monoclinic, orthorhombic, orthorhombic with a non-integral super lattice, stable orthorhombic and hexagonal, which exist in silica are explained based on on-line high-temperature ultrasonic velocity and attenuation measurements.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Taylor and Francis Group. |
| Keywords: | Nano Silica; Sol-gel; X-ray Diffraction; Ultrasonic Measurements; Structural Transition |
| ID Code: | 97225 |
| Deposited On: | 31 Jan 2013 05:37 |
| Last Modified: | 31 Jan 2013 05:37 |
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