摘要:

AbstractIn base glasses containing (a) Na2O 16, CaO 10, and SiO274% and (b) Na2O14, CaO 12, and SiO274%, MgO was substituted in steps of 2% for CaO. The effects of the substitution on liquidus temperature, viscosity, fiber softening point, and the resistance of the glasses to dilute acid and to distilled water are described.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14896.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractUsing the complete solution of silica grains as a criterion of melting, a comparison of the melting rate of a typical soda‐lime glass as affected by the grain size of the constituent materials has been made. This study indicates that if the grain sizes of raw materials are mismatched, separation or demixing of the batch during melting is likely to occur. The tendency of additions of cullet to minimize such separation is indicated.Further tests have been made on five commercial container‐glass compositions, which have raw materials of the same grain‐size distribution as those in commercial use. These experiments indicate a varying effect of the addition of cullet in decreasing melting time. This variation cannot be explained by differences in the degree to which the various raw‐material grain sizes are

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14897.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractThe methods and principles are discussed by means of which suitable glazes for special purposes may be prepared. Examples are given of glazes for low‐expansion bodies and also of durable low‐temperature gla

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14898.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractStrontia has proved to be a strong flux and a desirable glaze ingredient when it is used to replace PbO, ZnO, and CaO in a typical dinnerware glaze. By including it in the frit, the fluidity of the glaze was increased to a marked degree when it was substituted for ZnO and CaO and it also lowered the deformation temperature in the replacement of the latter oxide. Thermal‐expansion tests indicate that strontia has practically the same effect as lime on glaze expansion. Glazes of excellent visual and physical properties were obtained in a series of low‐lead and leadless compositions containing stron

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14899.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractA study was made of the factors affecting the pyrometric cone equivalent (P.C.E.) of silica fire clay made of ganister, clay, and silica‐brick culls. These factors include grind, mix proportions, and quality of raw material

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14900.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractStandard‐size 9‐in. brick with a weight of 5 lb. were successfully processed. Some of these brick had linear shrinkages of less than 1% in the A.S.T.M. load test at 1450°C. and less than 2% volume shrinkage in the 1600°C. A.S.T.M. reheat test. The pyrometric cone equivalent was 37 or

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14901.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY

摘要:

AbstractExtensive deposits of kaolinitic clay and closely associated bauxite occur in Pulaski and Saline counties, Arkansas, as products of early Cenozoic weathering of nepheline syenite. The clays of the bauxite‐kaolin deposits normally contain more than 35% of alumina. Siderite is the principal impurity. The deposits for the most part are buried beneath sediments of Wilcox age or younger, but the overburden is thin or absent near outcrops of syenite. Deposits beneath overburden that does not exceed 50 feet in thickness probably total more than 100 million ton

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1944.tb14902.x

出版商:Blackwell Publishing Ltd    

年代:1944

数据来源: WILEY