If you are experiencing problems downloading PDF or HTML fulltext, our helpdesk recommend clearing your browser cache and trying again. If you need help in clearing your cache, please click here . Still need help? Email help@ingentaconnect.com

Effect of the Reoxidation on Positive Temperature Coefficient Behavior of BaTiO3–Bi0.5Na0.5TiO3

$48.00 plus tax (Refund Policy)

Download / Buy Article:

Abstract:

As a positive temperature coefficient of resistivity (PTCR) material, (1−x)BaTiO3x(Bi0.5Na0.5)TiO3 (BT–BNT, 0.01≤x≤0.08) ceramics without any donor doping were prepared by a conventional solid-state reaction method. All samples were sintered in an N2 atmosphere at 1340°C, followed by reoxidizing at 800°–1100°C in air. The PTCR characteristics of BT–BNT ceramics were investigated in terms of BNT content, reoxidation temperature, and time. Room-temperature resistivity (RT) of simples sintered in N2 decreased to 102Ω·cm, and the jump in resistivity (maximum resistivity [max]/minimum resistivity [min]) was enhanced by three orders of magnitude through a suitable reoxidation process without sacrificing the RT. The Curie temperature (Tc) was shifted to a high temperature (>130°C) with an increase in the BNT content. With the addition of 4 mol% BNT, the obtained ceramic exhibited a low RT of 2 × 102Ω·cm, a typical PTC effect of max/min>103, and a Tc of 160°C.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2009.03562.x

Affiliations: School of Materials Science & Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China

Publication date: June 1, 2010

Related content

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more