摘要:

AbstractThe development of a casting body for sanitary ware is based on the theories that (1) organic deflocculating agents are inherently better than inorganic deflocculants; (2) the use of at least three ball clays and two kaolins permits better control of uniformity of physical properties of casting slip; and (3) the proper selection of domestic clays will give casting slips that cast as fast or faster than those made from imported clays. Comparisons with commercial bodies are made for color, shrinkage, absorption, speed of casting, and rate of thickening.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14812.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

AbstractMarked improvement in the workability of clays and the quality of the fired products can be attained with many clays by a control process that involves the regulation of pH and the character of base saturation by the addition of sodium carbonate and other alkaline materials. The amount of basic material which must be added to effect this proper control is most easily determined by the use of titration curves derived by titrating samples of the clays with alkali. The interpretation of the various types of curves thus obtained is discussed in detail. The control process, if desired, may be used in combination with deairing. The use of certain wetting agents in addition to the control process has given only slight additional benefit.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14813.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

AbstractTo secure reproducible results with the chemical durability test in which distilled water is used as the leaching medium, the distilled water must be prepared with special care because certain impurities, of which copper is the most important, are present in small quantities and exhibit a marked effect on alkalinity values. Other impurities, such as lead, iron, sodium silicate, and sodium carbonate, which may be found occasionally in distilled water, do not have as great an effect as copper on alkalinity values. The temperature at which the leaching is carried out has a much greater effect on the test than the length of the test period.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14814.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

Abstract(1) A description is given of a reliable and reproducible analytical method for testing the small amount of alkali derived from the glass by titration. (2) The magnitude and type of extraction of various commercial glasses by neutral alcoholic liquids during the accelerated test are determined, and a method of sealing alcoholic liquids in bottles during tests run above the boiling point is described. (3) The conditions of the test are determined for extracting alkali of the same order of magnitude as in (2), with water used as a leaching medium. (4) A correlation of the results on accelerated tests with visible flaking phenomena is presented. (5) The use of a dispersion function, as measured by standard deviation, to judge the results of an accelerated test is indicated.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14815.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY

摘要:

AbstractPhosphorus and phosphorus compounds, which are suitable fining and reducing agents for glasses to be melted under reducing conditions, have been applied in melting heat‐absorbing and copper ruby glasses. Ferrophosphorus conveniently introduces both iron and a reducing agent for heat‐absorbing glasses.By balancing ferrophosphorus and red phosphorus or ferrophosphorus and sodium sulfate, it was possible to obtain glasses with the optimum FeO content under all melting conditions. The use of copper phosphide produced a superior copper ruby glass which strikes at a lower temperature and more rapi

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1941.tb14816.x

出版商:Blackwell Publishing Ltd    

年代:1941

数据来源: WILEY