ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb18895.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractAntimonates of potassium, lithium, barium, calcium, magnesium, strontium, zinc, aluminum, lead, and tin were substituted for sodium antimonate in an acid‐resisting dry‐process enamel for cast iron. The sodium antimonate content of this high‐lead enamel was also varied to permit comparisons of all antimonates with sodium antimonate, as a standard, on an equivalent antimony pentoxide basis. Reflectance, color, and acid‐resistance data on all enamels are presented.A number of the antimonates were compared as replacements for sodium antimonate in non‐acid‐resisting enamels of the lead‐bearing and leadless types. Reflectance and color data are given.In acid‐resisting enamels, antimonates of potassium and barium compared reasonably well with sodium antimonate in opacifying power without introducing objectionable colors. Barium antimonate also produced improved acid resistance.In non‐acid‐resisting enamels, only barium antimonate produced results approaching sodium antimonate in both leadless and lead‐bearing types.The data indicate that the antimonates do not contribute equally to opacity and color, even though all contain antimony in pentavalent form. Barium antimonate most closely approaches sodium antimonate in effectiveness. The behavior of the antimonates suggests an explanation for the variations often encountered with a

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb18896.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractA study of the weather resistance of porcelain enameled architectural panels was begun at the National Bureau of Standards in 1939. The study involved 864 one‐foot‐square panels and an equal number of 4‐ by 6‐in. laboratory specimens. A previous report (1942) gave the results after one year of exposure. The present paper describes the condition of the panels after seven years of weathering in Washington, D. C., St. Louis, Mo., Lakeland, Fla., and Atlantic City, N. J.The results of the seven‐year inspection showed good correlation between the acid resistance of enamels and their resistance to weathering. When initial coverage was complete and no mechanical damage had occurred, protection of the metal by the enamel for all specimens was unimpaired after seven years. Colored enamels faded only on panels having poor acid r

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb18897.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractThe results of studies in the high‐alumina portion of the system BeO‐ Al2O3do not agree with those of previous workers. An X‐ray study of sintered and fused mixtures in this portion of the system indicates the existence of a hitherto unrecognized compound intermediate between chrysoberyl (BeO‐ Al2O3) and corundum (Al2O3) and possessing the probable formula BeO‐3 Al2O3. The new compound is optically almost identical with chrysoberyl but gives a decidedly different X‐ray pattern. Discussion and criticism of earlier work are presented with the aid of equilibri

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb18898.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY

摘要:

AbstractThe problems encountered in the use of one‐fire white enamels are reviewed. The reactions and changes taking place during the firing of an enamel are described in some detail and are illustrated by photomicrographs of a one‐fire white enamel. Photomicrographs are also shown of various white enamels fired directly on steel. Several possible steel and enamel combinations are considered. Data are given regarding the reflectance and chemical resistance of various white enamels fired at 1300° and 1500°F. The importance of the end use of the enameled article is empha

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb18899.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY

摘要:

The original compilation of phase diagrams was made by F. P. Hall and Herbert Insley and was published as the October, 1933, issue ofThe Journal of The American Ceramzc Soctety. These authors then followed with a supplement, published as the April, 1938, issue of the sameJournal, and with another complete compilation which was published as Part I1 of the Sovember, 1947, issue of thisJournal.The following compilation is the first supplement to the Sovember, 1947, issue. It includes corrections of errorst and omitted diagrams as well as those published since the 1917 compilation was printed.It is to be understood that temperatures are given in degrees centigrade and the compositions are given in weight percentage unless otherwise stated on the individual diagram.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1949.tb19765.x

出版商:Blackwell Publishing Ltd    

年代:1949

数据来源: WILEY