Abstract: Novel compositions of matter comprise polymeric materials containing, as a filler therefor, a semiconducting pyropolymeric inorganic refractory oxide material, said compositions being useful in situations which require items such as electrically conductive sheets which possess a given electrical resistance.

Abstract: Novel compositions of matter comprise polymeric materials containing, as a filler therefor, a semiconducting pyropolymeric inorganic refractory oxide material, said compositions being useful in situations which require items such as electrically conductive sheets which possess a given electrical resistance.

Abstract: A method of making conductive material for a conducting device. The material is formed by reacting an organic pyrolyzable substance in the presence of a refractory oxide having a surface area of from about 1 to about 500 square meters per gram in a non-oxidizing atmosphere at a temperature of at least 400.degree. C.

Abstract: Electrical resistor inks comprising a mixture of at least one semi-conducting pyropolymeric inorganic refractory oxide material and a vehicle consisting of a binder such as a synthetic resin or a varnish, and a suitable solvent or oil, etc., are useful in forming resistors in electrical circuits, especially on printed circuit boards and on the ceramic substrates used for thick film circuits. In addition, the ink may contain other components such as metal powders, anti-skinning agents, drying agents, colored pigments, waxes, etc.

Abstract: Improved forms of electric resistance elements or resistors may be made from semiconducting organic-refractory oxide fibers, as for example drawn alumina fibers which have been subjected to contact with a pyrolyzable organic substance at a temperature above about 400.degree. C. A few, or a large number of the semiconductive fibers, can be used in a group or bundle form to provide a desired resistance for a particular resistor. A preferred form of resistance element will cover the fibers in a quartz tube or other suitable encapsulating material to preclude moisture problems.

Abstract: Semi-conducting materials which may be used in preparing resistors may be prepared by treating a refractory oxide with a pyrolyzable organic compound at an elevated temperature and thereafter further treating the resultant semi-conducting pyropolymeric inorganic refractory oxide composite material at an elevated temperature with subsequently controlled cooling rate to provide a material which possesses a lower resistivity and a controllable temperature coefficient of resistance over a wide range.