ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14228.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

AbstractIn two base glasses, the first containing 16% of sodium oxide, 10% of dolomitic lime, and 74% of silica, and the second with 14% of sodium oxide, 12% of dolomitic lime, and 74% of silica, boric oxide was systematically substituted for (a) Na2O, (b) CaO MgO, and (c) SiO2in amounts of 1, 3, and 5%. The effects of these substitutions on such properties as liquidus temperature, viscosity, deformation temperature, fiber softening point, coefficient of expansion, and the resistance of the glasses to dilute acid and distilled water, are presented.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14229.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

AbstractBrick installed in glass‐tank checkers, removed, cleaned, and returned to service at higher operating temperatures showed excessive bloating and shelling; checker‐brick from open‐hearth checkers were affected in a similar manner. Chemical analyses of the several samples indicated that pickup of excessive alkalies may be responsible. The alkalies apparently were derived from either the batch, the fuel, or the ground water occurring under the checker set

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14230.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

AbstractThe differential thermal analysis apparatus described consists of an important improvement. This is the arrangement of the sample and standard holder so that the thermocouples become both the holder and the differential temperature measuring device. This arrangement permits easy removal of the sample and also permits the investigation of exothermic and endothermic reactions at much higher temperatures without damage to the thermocouples.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14231.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14232.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

AbstractThe surface tension of a series of compositions ranging from 0 to 100% PbO in the system PbO‐B2O3and of compositions ranging from 0 to 35% SiO2in the system PbO‐SiO2, was measured by a modification of the anchor ring method. The volatility and changes in composition of members of each system on heating were found to be related to the surface tension and its change with composition. Some correlation between the temperature coefficient of surface tension and expansivity was no

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14233.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY

摘要:

AbstractA method for determining comparative compressive stress produced in porcelain enamel on sheet iron is described. The method consists of preparation of laboratory samples under carefully selected and controlled conditions and measurement of the warpage produced in the sample due to application of enamel on one side. Data obtained by the above method are compared with expansion curves. Several methods of analyzing the curves fail to produce correlation between expansion as determined on frit samples and compression in the porcelain enamel as indicated by the warp of sample plates. It is concluded that expansion curves on frit samples are not a satisfactory means of evaluating compressive stress in the porcelain enamel coating on sheet iron.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1948.tb14234.x

出版商:Blackwell Publishing Ltd    

年代:1948

数据来源: WILEY