Patent · US Expired

Method for the preparation of finely divided, electrically conductive tin(IV) oxide

US5116468A · kind A · utility

3Cited by

0References

10Claims

0Family size

Assignee

Th. Goldschmidt. AG · DE

Inventors

Joachim Giersberg · Recklinghausen, DE
Dirk Naumann · Lorsch, DE
Frank Honselmann · Weingarten, DE

Key dates

Filing date	Oct 15, 1991
Grant date	May 26, 1992
Priority date	—
Expiry date	Oct 15, 2011

Classification

Technology area (CPC H)Electricity
CPC primaryH01B1/08
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is disclosed for the preparation of finely divided, electrically conductive tin(IV) oxide. In a first step tin(IV) oxalate and/or oxalates of polymeric tin(IV) compounds are obtained by electrolysis, in which the anode consists of tin or a tin alloy which contains a doping metal, and the cathode consists of a metal or graphite. The two electrodes are separated by a diaphragm or an organic membrane which is permeable to hydrogen ions and oxalic acid solution is used as electrolyte. Tin(IV) oxide is prepared in the second step by calcining the oxalates obtained from the solution of tin(IV) oxalate and/or oxalates of polymeric tin(IV) compounds, to which known doping agents have been added in conventional amounts.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.