ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15722.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractThe chemical and physical requirements of porcelain enameling sheets are presented. It is explained why the most satisfactory base metal for enameling purposes is one low in carbon, manganese, sulfur, phosphorus, and silicon. Thermal expansion curves and pertinent photomicrographs are shown.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15723.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractIn 1931, Kubelka and Munk worked out the relationship between reflectance and thickness of material for thin, homogeneous layers illuminated diffusely. In the equation expressing this relationship, the hypothetical ideal material is defined by two constants, reflectivity and coefficient of scatter. In the present paper are presented data demonstrating how well the reflectance characteristics of vitreous enamels can be specified by these constants.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15724.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractThe enameling properties of three different irons are described and their analyses are given. Photomicrographs are shown, depicting the structure of each iron near the surface before and after enameling. Structural changes during enameling are described and discussed as to their possible influence on enameling properties. It is shown that one iron anneals perfectly during enameling with no apparent surface alteration, another anneals perfectly but shows surface decarburization; the third sample does not anneal perfectly. Sample No. 1 enamels better than either No. 2 or No. 3.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15725.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractThe photoelastic birefringence of solids is caused by the superposition of two effects. An elastic deformation changes the arrangement of the atoms. If the deformation is a simple strain, this effect produces negative birefringence which increases with increasing refractive index of the solid. The second effect is due to a deformation of the atoms. A strain creates optical anisotropy of the atoms and causes positive birefringence. In most glasses the second effect is predominant, but for glasses with a large index of refraction the first effect takes precedence.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15726.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractAn instrument is described for measuring quantitatively the workability of clays, using the principle of twisting rapidly a tubular test specimen and recording the stress‐strain diagram. Some results are given to indicate the value of this instrumen

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15727.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY