摘要:

AbstractComparative results are given using the American Ceramic Society No. 1 powder method on several glasses representing lime, lead, and borosilicate compositions. The effect of temperature on the rate of attack and some comparisons of surface attack to the powder method are given.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1936.tb19846.x

出版商:Blackwell Publishing Ltd    

年代:1936

数据来源: WILEY

摘要:

AbstractGlass fibers have been produced in large quantities running from 0.0007‐ to 0.00005‐inch fiber diameter. The strength of individual fibers and the strength of yarns produced from these fibers have received preliminary investigation. Some of the strengths obtained are quite remarkable, running into the order of 11/2 million pounds per square inch. Even these strengths fall short of the theoretical possibilities. Some possible reasons and explanations are discus

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1936.tb19847.x

出版商:Blackwell Publishing Ltd    

年代:1936

数据来源: WILEY

摘要:

AbstractA series of lead oxide‐silica glasses varying in composition from 10 to 60 mol % of PbO was prepared and diffraction patterns were obtained. The observed intensity curves derived from these patterns were matched with curves calculated from assumed structures by means of the scattering equation of Zernicke and Prins. The atomic arrangement finally derived consists of a continuous, randomly oriented, three‐dimensional network of silicon‐oxygen tetrahedrons and lead atoms. There was no indication of molecular or aggregate formation and no discrete atomic grouping of this nature was postulated to explain the X‐ray evidence. The study of this series of glasses further substantiates the results obtained by Warren and Loring for soda‐silica glasses and is in accord with Zachariasen's picture

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1936.tb19848.x

出版商:Blackwell Publishing Ltd    

年代:1936

数据来源: WILEY

摘要:

AbstractPhysical properties of lead oxide‐silica glasses were studied in an attempt to correlate these properties and explain the anomalies occurring in their temperature and time curves on the basis of the structure of glass as derived in Part I of this investigation. The transformation point is denned as a critical temperature, and an explanation is offered for the dependence of this temperature on heat treatment and conditions of test. The change in the apparent viscosity of a glass fiber with time is explained on the basis of the distorted glass structure. The Adams and Williamson equation for strain release is adapted to substantiate the theory of the structure of glass consisting of a continuous, randomly oriented, three‐dimensional network of at

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1936.tb19849.x

出版商:Blackwell Publishing Ltd    

年代:1936

数据来源: WILEY