ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15771.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractA modification of the Steger method is described for measuring the stress in a glaze. The test specimen consists of a double‐pronged fork glazed on the outside so that the distance between the ends of the prongs gives a measure of the glaze stress. A method has been devised to calculate the actual stress in the glaze from the deflection of the prongs. Actual stress curves are given for several body combinations when the specimens are cooled, and the influence of aging and treatment in the autoclave is discusse

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15772.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractVariations in the fluid properties of glazes produced by different bodies were studied, and several methods for testing the wetting ability of the glazes were compared. An angle‐of‐contact method was found best for measuring the ability of glazes to wet bodies. It was found that different bodies had varying effects on the fluid properties of a glaze. The maturing temperatures of a glaze are not fixed for a given glaze but may vary as much as four cones on different bodies, if wetting ability is considered in determining this temperat

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15773.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractX‐ray diffraction patterns were obtained for five compositions of soda‐silica glass. The patterns were made in an evacuated camera, using MoKα radiation monochromated by reflection from rock salt. The patterns show a perfectly continuous change in appearance with increasing soda content. From a Fourier analysis of the X‐ray scattering curves, radial distribution curves for the five glasses were obtained. The distribution curves uniquely establish several important points. Each silicon atom is surrounded by 4 oxygens at a distance of about 1.62A and each sodium by about 6 oxygens at 2.35A. The existence in the glass of simple discrete molecules, such as SiO2, NaaO, Na2Si2O6, and Na2SiO3, is uniquely ruled out by the distribution curves.The X‐ray results lead to the following picture of soda‐silica glass. Each silicon is tetrahedrally surrounded by 4 oxygens at a distance of about 1.62A. Part of the oxygens are bonded to 2 silicons and part only to 1 silicon. The sodium ions Na+are arranged in various holes in the silicon‐oxygen network, being surrounded on the average by about 6 oxygens at a distance 2.35A. Although this is a definite scheme of structure, it does not repeat identically at regular intervals, and the material, therefore, is no

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15774.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY