Title

Synthesis, Characterization And Measurements Of Electrical Properties Of Alumina-Titania Nano-Composites

Abstract

In this study, we have synthesized and characterized nanocrystalline alumina-titania (Al2O3-TiO2) composites via a simple sol-gel process, using aluminum propoxide and titanium propoxide as precursor chemicals. Propanol and 2-methoxy ethanol were used as solvent and stabilizer, respectively. The as-formed gel was heat treated at 400°C, to obtain amorphous powder. The amorphous powder was subsequently calcined at 700°C and 900°C. Phase evolution, phase composition, crystal structure and crystallite-size of the synthesized powder were determined using X-ray diffraction (XRD) technique. Crystallite-size was further confirmed by high-resolution transmission electron microscopy (HR-TEM). HR-TEM results of powder calcined at 700°C showed agglomerates of powder particles, with particle-size in 15 - 20 nm range. The synthesized powder was uniaxially pressed using a steel mold and then sintered at elevated temperature (1000-1500°C) for densification study and electrical property measurements. XRD technique was used to study phase composition of the sintered pellets. Dielectric constant and dissipation factor of the sintered pellets were measured. The effects of sintering time, temperature and phases present on the electrical properties of the sintered pellets, were studied.

Publication Date

12-1-2006

Publication Title

Ceramic Engineering and Science Proceedings

Volume

27

Issue

8

Number of Pages

11-22

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

33845985986 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/33845985986

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