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DEVELOPMENT OF HARD GLASSES *
Author(s) -
Pavlish A. E.,
Mockrin I.
Publication year - 1947
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1947.tb19650.x
Subject(s) - knoop hardness test , materials science , oxide , metallurgy , mineralogy , work (physics) , phase (matter) , indentation hardness , chemistry , microstructure , engineering , mechanical engineering , organic chemistry
A bstract This paper covers a phase of the work which was carried out for the Office of Production Research and Development of the War Production Board on the development of glasses of increased hardness for use as instrument bearings. A literature survey was made and a study started on the development of hard glasses for use in the manufacture of glass bearings. The data are of interest since information on the effects of a number of these oxides on the hardness of glass either have not been published previously or, in former studies, the amounts of oxides were not so large as those used in this work. Practically all of the work reported here was done either in the alumina‐silica‐boric oxide‐calcium oxide system or on glasses derived from this system by substitution of various oxides, chiefly for silica. The Knoop hardness numbers of the glasses are reported. Data were not obtained on the working properties of the glasses described herein. In addition to the footnote references, a comprehensive bibliography is given at the end of the paper.