Home
Resources
Publications
Characterization of Fine Grain Ba0.995Y0.005TiO3 Ceramics Obtained From Gel-Precursor Nanopowder

Characterization of Fine Grain Ba0.995Y0.005TiO3 Ceramics Obtained From Gel-Precursor Nanopowder

Marin Cernea, Odile Monnereau, Philip Llewellyn, Eugeniu Vasile

J Nanosci Nanotechnol. 2007 Mar;7(3):1014-20.

PMID: 17450868

Abstract:

Using an acetate-alkoxide sol-gel route in which the precursors are barium acetate, yttrium isopropoxide and titanium diisopropoxide bis-acetylacetonate, we prepared a ferroelectric material with the formula: Ba1-xYxTiO3, x = 0.005. SEM analysis showed a polymeric microstructure of the gel due to the chelated titanium alkoxide precursor used as starting materials. The evolution of the structure and microstructure of the precursor gel heated at temperatures up to 1000 degrees C was studied by various techniques. The powder obtained by heating the gel at 1100 degrees C presented a homogeneous structure consisting of submicronic particles (approximately 200 nm). XRD and SAED analyses revealed that Ba0.995Y0.005TiO3 nanocrystals of about 5-10 nm appeared at 600 degrees C, together with BaCO3. The presence of barium carbonate was identified also by IR spectroscopy and thermal analyses. The ceramics obtained from the as-prepared powder presented good dielectric properties (capacitance = 840 pF/dielectric constant = 3860 and dielectric loss (tandelta) = 0.078 at Curie temperatures of 120-121 degrees C).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP24363379	Barium isopropoxide		24363-37-9	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: