Lead-tellurium inorganic reaction systems

US10224438B2 · kind B2 · utility

Assignee

• HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN LLC · US

Inventors

• Cuiwen Guo · Horsham, US
• Li Yan · West Conshohocken, US
• Lei Wang · Shanghai, CN

Key dates

• Filing date: Mar 10, 2017
• Grant date: Mar 5, 2019
• Expiry date: Mar 10, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/50
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention provides an electroconductive paste comprising metallic particles, an inorganic reaction system, and an organic vehicle. The inorganic reaction system includes a lead-tellurium-magnesium composition of Formula (II): Pba—Teb—(Mgw—Cax—Sry—Baz)-Md-Oe, wherein 0<a, b, or d≤1, 0≤w, x, y, z≤1, w+x+y+z=c, at least one of w, x, y and z is greater than zero, the sum of a, b, c and d is 1, 0<c≤0.2, 0≤d≤0.5, a:b is between about 10:90 and about 90:10, (a+c+d):b is between about 10:90 and about 90:10, M is one or more elements, and e is a number sufficient to balance the Pb, Te, Mg—Ca—Sr—Ba and M components.