Report on German Developments in Semi-Conducting Materials (Resistors, Thermistors, Varistors, ect.) Report on Investigation for the Communication JIOA Subcommittee

摘要

The purpose of this report is to present the informations ac¬cumulated in Germany on resistors, and particularly on the type of the resistors, used as circuit elements known as thermistors or varistors, with specific requirements upon the change of their resistance with temperature.nA more specific reason is to release for general use the reports of the members of two German organizations which are credited with the most important work on resistors made with semi-conducting materials, namely Osram and Siemens-Halske. In this respect the work of Osram is of a particular interest in connection with their investigations of the increase of electrical conductivity of certain materials (stub, as T2O2 or magnesium ferrites) in steps by the method of ejection of 0 in quan-tities not detectable by the ordinary chemical analysis.