Electromagnetic wave absorbers comprised of barium titanate powders
First Claim
Patent Images
1. A composition of matter comprising an electromagnetic wave absorbing amount of finely divided barium titanate particulates homogeneously dispersed in a solid organic matrix material, the mean diameter of such barium titanate particulates being equal to or greater than 1 micron at least 50% by volume of such barium titanate particulates being in the quadratic crystalline state.
1 Assignment
0 Petitions
Accused Products
Abstract
Novel compositions containing finely divided barium titanate particulates homogeneously dispersed in a solid organic matrix material, the barium titanate particles having a mean diameter of at least 1 micron, are well adopted for the production of electromagnetic wave absorbers, e.g., seals for microwave ovens.
14 Citations
18 Claims
- 1. A composition of matter comprising an electromagnetic wave absorbing amount of finely divided barium titanate particulates homogeneously dispersed in a solid organic matrix material, the mean diameter of such barium titanate particulates being equal to or greater than 1 micron at least 50% by volume of such barium titanate particulates being in the quadratic crystalline state.
-
11. A process for the preparation of finely divided barium titanate particulates having a mean diameter of at least 1 micron, comprising heat treating a submicronic barium titanate powder at a temperature of from 1,100°
- to 1,600°
C. - View Dependent Claims (12, 13, 14, 15, 16)
- to 1,600°
Specification