Ceramics in relation to the durability of porcelain suspension insulators

The fundamental requirements in satisfactory high-voltage line insulators are summarized and particular emphasis is placed upon the need for coordinated study of service durability. The effect of porosity upon durability is explained in detail and an appeal made for the establishment of a practical porosity elimination test. The manufacture and structure of electrical porcelain is studied from the viewpoint of the ceramist, with many quotations and illustrations taken from the Transactions of the American Ceramic Society. The author briefly states the conclusions at which he has arrived and gives a very complete list of references and notes.