A study of materials for their suitability as Standard dielectric reference materials

The Standards Group within the Dielectrics Section of the National Bureau of Standards has undertaken an investigation with the object of producing a set of Standard Specimens with well-defined dielectric constant and loss index. An important attribute of such a group of specimens is that their electrical properties should not be subject to unpredictable change as a function of environment or time. Furthermore, both high-loss and low-loss specimens are needed.