INORGANIC BINDERS FOR C CORES
Abstract
An inorganic glassy binder and a method for its application to a wound-cut type C core were developed. The binder, having a composition and the properties of glass, served as an electrical insulator as well as the adhesive. Sample cores were constructed by fusing a very thin layer of the binder to the surfaces of grain-oriented silicon-steel strips and winding the composite until the required build-up was obtained. During the requisite stress relief anneal, a laminar bond between the adjacent binder-coated turns was accomplished. A total of 48 sample cores were constructed for binder evaluation. Sample cores constructed with 2 steel thicknesses had space factors, net steel weights, and mean magnetic paths nominally equivalent to commercial cores. These cores were evaluated for core loss and excitation at various flux densities at room temperature, 400, 600 and minus 55 C. Effects of heat aging on their mechanical and electrical properties were determined. The core loss and excitation values at 15 kilogausses were less than the published rejection limits for equivalent commercial cores. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 29, 1962
- Accession Number
- AD0290238
Entities
People
- C.a. Eaves
- Jürgen Seidel