摘要:

AbstractThe density, refractive index, and specific refractivity and their relationship to the composition of glass are discussed. The subject is treated from the standpoint of additive properties based on composition both as to linear and collective or complex functions. Not only are these applied in the rapid checking of constancy of composition in practice but also from the standpoint of possible changes in properties through partial changes of individual components. There is the further possibility of tying up constitution with composition so that a structural analysis may result. The article serves as a review of existing literature and elaborates the possibility of expansion of published data.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16027.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

AbstractA series of melts of soda‐lime‐silica glass cullet in contact with various chemical elements was made to determine by observation the extent of the reaction between metal and glass. The heat treatment consisted of a period of two hours at about 1250°C. An atmosphere of hydrogen gas was used to protect the element from oxidation during the the test period. Various colors were produced by Cu, Ag, Au, Se, C, S, and Zr. Black fogs resulted from melts containing Ba, Cr, or V; gray or black fogs with reddish zones resulted from Mg, Ca, Ti, Mn, Si, and Al. A faint blue with large reddish zones was produced by Co. Only slight attack was shown by Fe, Ni, Zn, Cd, Bi, Sn, Pb, Mo, a

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16028.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16029.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

AbstractThe construction and operation of a mercury volumeter suitable for determining the volume of a composite sample of refractory grains is described. Porosity determinations by the method described are accurate within ∼0.15%. Convenient volume‐density‐porosity conversion charts are inc

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16030.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

AbstractThe development of cast alumina refractories is briefly described, and the physical and chemical properties of three types of high‐alumina, fusion‐cast refractories that have proved commercially successful are given. Such properties as microstructure and glass‐refractory interface reactions are discussed, and the use of these refractories with several different types of glass is desc

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16031.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

AbstractThe beneficiation of the feldspathic waste from a titanium mine near Roseland, Virginia, is discussed. This waste, which is mainly sodic plagioclase, quartz, and an iron‐bearing mineral, gedrite, contains about 5.3% of Fe2O3. By magnetic concentration, 73% of the feed was recovered in a feldspar‐quartz mixture with an iron content of 0.81% of Fe2O3. From this nonmagnetic product, between 85% and 90% of the feldspar with an iron content of 0.41 to 0.52% of Fe2O3was recovered by agglomerate tabling and flotation. Examination of the feldspar concentrate, however, showed that iron stains and iron‐bearing impurities of microscopic size in the feldspar prevented the separation of a feldspar concentrate with less than 0.36% of

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16032.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY

摘要:

AbstractThe greatest fault of overglaze decalcomania is the lack of resistance to solution and abrasion, which is due chiefly to the fluxes used for adherence to the glazed surfaces and for the development of brilliancy. With our increasing knowledge of silicate eutectics, these properties may be greatly improved. Various color fluxes are tested and several experimental fluxes with improved chemical resistance are reported. The possibilities of overglaze colors and decalcomania that mature at 1500° and 1750 °F. are also discussed, and some data are furnishe

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1940.tb16033.x

出版商:Blackwell Publishing Ltd    

年代:1940

数据来源: WILEY