PTCR-resistor

US6144286A · kind A · utility

Assignee

• Dornier GmbH · DE

Inventors

• Ralf Moos · Friedrichshafen, DE
• Marco Fandel · Obergünzburg, DE
• Wolfgang Schaefer

Key dates

• Filing date: Apr 21, 1999
• Grant date: Nov 7, 2000
• Expiry date: Apr 21, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49082
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A Positive Temperature Coefficient of Resistance resistor includes a ceramic material of the composition [(Ba.sub.1-e-x Sr.sub.x R.sub.e).sub.1-a M.sub.a ][(Ti.sub.1-b-d N.sub.b Q.sub.d)].sub.c O.sub.3, wherein M is a trivalent or quadrivalent element or a mixture of two or several of these elements; N is a quinquevalent or hexavalent element or a mixture of two or several of these elements; Q is a quadrivalent element or a mixture of two or several of these elements; R is a bivalent element or a mixture of two or several of these elements; and 0.5.ltoreq.x.ltoreq.1, a is 0 or 0.0003.ltoreq.a.ltoreq.0.3, and b is 0 or 0.0003.ltoreq.b.ltoreq.0.3, 0.8.ltoreq.c.ltoreq.1.2, 0.ltoreq.d.ltoreq.0.2, and 0.ltoreq.e.ltoreq.0.2.