Method of manufacturing porcelain for electric insulators by controlling grain size
Abstract
Abstract THE TOUGHNESS OF PORCELAIN MATERIALS, OR THE CRACKPROPAGATION-RESISTANCE THEREOF; CAN BE IMPROVED BY USING QUARTZ OR CALCINED BAUXITE WITH A CONTROLLED GRAIN SIZE DISTRIBUTION. A METHOD FOR PRODUCING PORCELAINS WITH IMPROVED TOUGHNESS, BY FIRING AT A TEMPERATURE OF 1,180* C. TO 1,350* C., A BODY CONTAINING LESS THAN 30.0% BY WEIGHT OF QUARTZ HAVING A GRAIN SIZE DISTRIBUTION CONSISTING OF LESS THAN 2.0% BY WEIGHT OF PARTICLES WITH AN EFFECTIVE DIAMETER SMALLER THAN 10 MICRONS AND MORE THAN 97.0% BY WEIGHT OF PARTICLES WITH AN EFFECTIVE DIAMETER SMALLER THAN 50 MICRONS, OR A BODY CONTAINING 10.0 TO 60.0% BY WEIGHT OF CALCINED BAUXITE GRAINS HAVING A GRAIN SIZE DISTRIBUTION CONSISTING OF LESS THAN ON THE ORDER OF ABOUT 3% BY WEIGHT OF PARTICLES WITH AN EFFECTIVE DIAMETER SMALLER THAN 1 MICRON AND LESS THAN 60.0% BY WEIGHT OF PARTICLES WITH AN EFFECTIVE DIAMETER SMALLER THAN 10 MICRONS AND MORE THAN 97.0% BY WEIGHT OF PARTICLES WITH AN EFFECTIVE DIAMETER SMALLER THAN 60 MICRONS.
Inventors
- 👤 Noboru Higuchi
- 👤 Yutaka Ogawa
- 👤 Akihiro Watanabe
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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