摘要:

ABSTRACTAn enamel composition to which any workable enamel of this type must quite closely conform is given. Eighty‐six per cent of the enamel composition must be held within definite proportions. The function of each of these constituents and the percentage required are discussed. The remaining 14% of the enamel may be supplied by combinations of BaO, PbO, and ZnO, with some latitude in proportions permissible. Results of a careful study of the influence of each on smelting properties, acid resistance, fusibility, covering power, color, and brightness are presente

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13871.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTTwo series of enamels were made with calculated cubical coefficients of expansion varying from 361 to 306. In both series of enamels, the cross‐bending values were inversely proportional to the coefficient of expansion. This is due to the fact that all enamels on sheet steel have lower coefficients of thermal expansion than steel. In cooling, after the enamel is fused to the metal, strains are set up in the enamel; the lower the expansion of the enamel the greater the strains. When the enameled piece is bent, the greater the stresses present, the farther the pieces can be bent before there is any real tensile strain on the enamel. High bending ability is dependent primarily on high compressive strains induced by lower coefficient of expansion of the enamel than of the metal base. Compressive strains cause warping, fishscaling (in ground coat), and chipping; therefore the bending strength should not be too high. In all control work both the minimum and the maximum bending strength should be specifie

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13872.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTThe effect of changing the fineness OF the feldspar in an enamel was investigated, from which test it was concluded that resistance to deflection is lowered about 9% with a slight increase in fusion temperature when substituting 40‐mesh (glassmakers') feldspar for 120‐mesh feldspar, both of the same chemical composit

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13873.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTTwenty‐five synthetic fluxes composed of ceramic materials, compounded in their eutectic proportions and fused to clear glasses, were added to a body of the semivitreous type in varying amounts, and their effect on vitrification was studied. It has been found possible to reduce the feldspar content of such a body to 8% and, by an addition of 2% of auxiliary glass, to develop almost any desired degree of body vitrification between 0.5 and 7.0% at a temperature as low as cone

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13874.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTA group of twenty‐eight floor tile bodies in a triaxial field was studied experimentally for the purpose of developing a vitrified, non‐staining tile at con

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13875.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTThis work was undertaken to develop a ring for the determination of glaze stresses which would show movements great enough to be measured with a micrometer caliper. The 3‐inch diameter ring developed makes quick measurements possible without the use of the micrometer microscope necessary with the 2‐inch ri

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13876.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTVarious amounts of practically all of the chromatic elements in the periodic system were introduced individually into a simple lead silicate glaze, and the resulting glazes were analyzed for color with an automatically recording photoelectric color analyzer. The spectrophotometric data were then converted into trichromatic and monochromatic specifications of color. An empirical relationship was then determined between the concentration of the chromatic element and the three attributes of color: hue, saturation, and brilliance. The effect of glaze thickness on color was also studied. It was found that the same laws connecting concentration of the coloring element with the three attributes of color held for all the elements used. A number of elements not previously mentioned in the literature as color‐producing agents were found to give interesting colored glazes. In several cases an element was added to the base glaze in various forms, such as nitrates, chlorides, and oxides. If equivalent amounts were added, the color in all cases was the same regardless of the colorless radica

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13877.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13878.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTNew developments in the field of silicate refractories include greatly improved refractoriness and a high development of desirable qualities in silica refractories manufactured from Sharon conglomerate. The nature of silica refractories in general is discussed and a résumé of materials utilized in the manufacture of silica brick in the United States is given. Several illustrations of this new refractory are included, as well as test dat

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13879.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY

摘要:

ABSTRACTThe formula, % Al2O5= 0.85 ×% SiO2+ 0.85 (100 – 2.15 ×% SiO2) – 5.1, is presented for use in estimating the per cent of All08 of diaspore and burley clays. The silica determination is quick enough and cheap enough to make control testing of carload shipments practicable. The method applies to the lowest‐grade burley as well as the highest‐grade diaspore. The results of 381 actual analyses are presented showing that the method is accurate to 1% in 65% of the tests and to 2%, in 89% of

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1932.tb13880.x

出版商:Blackwell Publishing Ltd    

年代:1932

数据来源: WILEY