Barium titanate insulators

Claim 1

IN THE MANUFACTURE OF A CRYSTALLINE BARIUM TITANATE PRODUCT SUITABLE FOR THE PRODUCTION OF VITRIFIED CERAMIC INSULATOR BODIES POSSESSING LOW POWER LOSS CHARACTERISTICS AND A HIGH DEGREE OF PERMANENCE IN DIELECTRIC PROPERTIES, THE STEPS OF MIXING TOGETHER COMPONENTS CONSISTING ESSENTIALLY OF BARIUM CARBONATE, AT LEAST SUFFICIENT TITANIUM DIOXIDE FOR STOICHIOMETRIC COMBINATION WITH SUBSTANTIALLY ALL OF SAID BARIUM CARBONATE TO PRODUCE BARIUM TITANATE, THE AMOUNT OF BARIUM CARBONATE AND TITANIUM DIOXIDE IN SAID MIXTURE BEING SUFFICIENT TO FORM BARIUM TITANATE IN AN AMOUNT ACCOUNTING FOR AT LEAST A MAJOR PROPORTION OF THE WEIGHT OF THE PRODUCT FORMED FROM SAID MIXTURE, A TIN COMPOUND SELECTED FROM THE GROUP CONSISTING OF SNO2 AND TIN COMPOUNDS YIELDING SNO2 UNDER CALCINING CONDITIONS, SAID TIN COMPOUND BEING PRESENT IN AMOUNT SUFFICIENT TO IMPART LOW POWER LOSS CHARACTERISTICS, AND AN OXYGEN-CONTAINING BISMUTH COMPOUND, SAID BISMUTH COMPOUND BEING PRESENT IN SAID MIXTURE IN AN AMOUNT SUFFICIENT TO ACCOUNT FOR AT LEAST ABOUT 3 PARTS BY WEIGHT FOR EVERY 100 PARTS BY WEIGHT OF BARIUM TITANATE IN THE PRODUCT, AND THEN HEATING THE MIXTURE TO A CALCINING TEMPERATURE, WHEREBY THE BARIUM CARBONATE AND TITANIUM DIOXIDE REACT CHEMICALLY TO PRODUCE A CRYSTALLINE BARIUM TITANATE PRODUCT.