ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14359.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

ABSTRACTThis paper presents the results of an experimental study on the production of selenium ruby glass, particularly on the retention of the colorants during the melting and fining operations. Selenium, cadmium, and sulfur are necessary in the final glass to get a ruby color. Reducing conditions are conducive to the retention of a large percentage of the selenium in the glass, but when conditions are highly reducing, cadmium is eliminated almost completely. The writers believe that too little attention has been given in the past to the chemistry of the entire glass batch, and as a result operators and research workers have often failed to get a ruby glass not because the loss of selenium was too high but because they eliminated the cadmium by maintaining too strongly reducing conditions.A balance must be maintained so that the batch and the atmosphere above it are sufficiently reducing to hold enough selenium in the melt but not so strongly reducing as to eliminate the cadmium.Most of the work reported in this paper was done on soda‐lime‐silica glasses similar to those melted in continuous tanks for the production of machine‐made ware. A glass of this composition, containing 0.03% of selenium, 0.06% of cadmium, and 0.03% of sulfur, will produce a ruby color. The writers have found that if the cadmium is added as cadmium sulfide the final glass will have sufficient sulfur for color development. The use of silicon as a reducing agent is suggested.An arrested‐cooling procedure for developing color is described

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14360.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

ABSTRACTA black glass was made by melting a soda‐lime‐silica glass under a reducing atmosphere with the addition of 0.6% of selenium and 0.1% of cobalt carbonate, CoCOs. The light absorption of a specimen about 0.01 inch thick in the range of 400 to 750 mp was superior to that of commercial black glass. The maximum transmission was 27% at 750 mp. The use of nickel and iron oxides is less effective than cobalt oxide for obtaining selenium black gl

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14361.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

ABSTRACTThe properties of the most important zirconium compounds are correlated to the main ceramic applications of these compounds, namely, refractories, ceramic bodies, binders, cements, glazes, glasses, and enamels. A brief survey of the information available on the systems MgO‐ZrO2, TiO2‐ZrO2, SiO2‐Na2O‐ZrO2, and several other systems is included. The more specific ceramic properties are summarized in short descriptions of the applications to each single ceramic field. The ceramic uses of thorium oxide are

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14362.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

ABSTRACTCerium oxide in glasses is the strongest oxidizing agent with respect to iron. In combination with neodymium oxide, which compensates the remaining hue, it represents the ideal decolorizer. Cerium oxide absorbs in the ultraviolet without affecting visible transmission. It is used as an enamel opacifier in France, Various other applications of the rare earths are listed, including those which are based on the abrupt division of the visible spectrum by the sharp absorption band of neodymium in the green.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14363.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY

摘要:

ABSTRACTAn investigation was conducted of certain factors which influence the reproducibility of autoclave chemical durability tests. These factors include the method of preparation and the purity of the water used, the rinsing procedure, the volume of solution used, and variations in the test temperature and in the duration of the different periods of the heat cycle. The effect of the internal area of the container on the test results was determined, and suggestions are presented for increasing the reliability of the tests.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1942.tb14364.x

出版商:Blackwell Publishing Ltd    

年代:1942

数据来源: WILEY