Preparation of sol-gel method P2O5-Al2O3-SiO2 glasses and their characterization

Abstract

Abstract.. Nanostructures P2Os-A1203-SiO2 glasses were prepared by sol-gel method. The glasses were characterized by XRD, FTIR and TG/DTA methods. The average pore size of the glass was less than 3 nm as measured by N2 adsorption -desorption method. The thermal stability was measured as a function of decomposition temperature and weight loss calculations. Proton conductivities of all samples increased with an increase in relative humidity (40 -90 %), indicating that continuous paths suitable for proton conduction were developed when glasses heat treated at 300 ~ due to the adsorption of water. The temperature dependence of the conductivity for all compositions increases with increasing temperature in the range 30 -90 ~ with relative humidity 70 %. The overall conductivity was in the range 104 -10 3 S/cm for compositions.

Low-temperature operation of H2/O2 fuel cells using proton-conducting glasses containing heteropolyacid

“…Glasses as electrolyte and Pt/C electrode preparations were similar and described all details in our previous reports [10,11]. TG/DTA measurements were carried out with the model SSC-5200 (SEIKO Instrument) under a nitrogen atmosphere using heating rate of 5°C/min.…”

Nanogranular Al2O3 proton conducting films for low-voltage oxide-based homojunction thin-film transistors

“…[9][10][11][12] In general, mesoporous oxide lms such as Al 2 O 3 and SiO 2 were prepared by sol-gel and similar techniques. 7,10,17,18 However, such techniques involve a heating activation stage to get the nal lm, produce a substantial amount of waste materials, and generally lack uniformity in terms of lm thickness and composition. [19][20][21] In our previous work, as an alternative to the solution process, a conventional plasma-enhanced chemical vapor deposition (PECVD) process was used to facilitate the one-step deposition of nanoporous SiO 2 -based proton conducting thin lms at low temperature.…”