Structural, dielectric, impedance and optical properties of CaBi2B2O7 glasses and glass-nanocrystal composites


Autoria(s): Majhi, Koushik; Varma, KBR
Data(s)

15/10/2009

Resumo

Optically clear glasses were fabricated by quenching the melt of CaCO3-Bi2O3-B2O3 (in equimolecular ratio). The amorphous and glassy characteristics of the as-quenched samples were confirmed via the X-ray powder diffraction (XRD) and differential scanning calorimetric (DSC) studies These glasses were found to. have high thermal stability parameter (S). The optical transmission studies carried out in the 200-2500 nm wavelength range confirmed both the as-quenched and heat-treated samples to be transparent between 400 nm and 2500 nm. The glass-plates that were heat-treated just above the glass transition temperature (723 K) for 6 h retained approximate to 60% transparency despite having nano-crystallites (approximate to 50-100 nm) of CaBi2B2O7 (CBBO) as confirmed by both the XRD and transmission electron microscopy (TEM) studies. The dielectric properties and impedance characteristics of the as-quenched and heat-treated (723 K/6 h) samples were studied as a function of frequency at different temperatures. Cole-Cole equation was employed to rationalize the impedance data.

Formato

application/pdf

Identificador

http://eprints.iisc.ernet.in/24912/1/9.pdf

Majhi, Koushik and Varma, KBR (2009) Structural, dielectric, impedance and optical properties of CaBi2B2O7 glasses and glass-nanocrystal composites. In: Materials Chemistry and Physics, 117 (2-3). pp. 494-499.

Publicador

Elsevier Science

Relação

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TX4-4WTYXTB-2&_user=512776&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000025298&_version=1&_urlVersion=0&_userid=512776&md5=5b2a07aeb3e5cc04e006fbcdd6e02ea3

http://eprints.iisc.ernet.in/24912/

Palavras-Chave #Materials Research Centre
Tipo

Journal Article

PeerReviewed