ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16979.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThis work utilized the samples used by Monack, Shardlow, and Warnsley in previous experiments.1Between cones 7 and 10, the dielectric strength was found to be inversely proportional to the per cent apparent porosity. Between cones 10 and 15 the dielectric strength increased gradually while the apparent porosity remained essentially zero. No relation existed between dielectric strength and total porosity (open and closed pores). Overfiring does not seem to decrease the dielectric strength unless a definite vesicular structure is developed.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16980.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTSome of the factors limiting the firing cycle of semiporcelain ware are listed. Satisfactory seven‐inch bisque, eight high, was obtained with a complete firing cycle of 15½ hours. Satisfactory glost was obtained with a complete firing cycle of 8½ ho

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16981.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTAn investigation was made of the fusion behavior of the potash feldspar, soda feldspar, and soda‐lime feldspar system, all materials being of commercial grade. The potash feldspar had a pyrometric cone equivalent of cone 9½, the soda feldspar, cone 6½, and the soda‐lime feldspar deformed at cone 11½. Mixtures varying according to the triaxial diagram were made in the form of pyrometric cones. These were fired in groups along with standard Orton cones.The 30% commercial potash feldspar‐70% commercial soda feldspar mixture reached 6 o'clock deformation when standard Orton cone 6 showed 2 o'clock deformation.The mixture of 62½% commercial potash feldspar with 37½% soda‐lime feldspar reached 6 o'clock deformation when cone 7 showed 1 o'clock deformation, the deformation of the cone 9½ potash feldspar being reduced 3 cones by the addition of the proper percentage of the cone 11½ soda‐lime feldspar.There was an increase in deformation temperatures (no indication of eutectic) in the plagioclase series, soda feldspar to soda‐lime feldspar.The mixture of 30% commercial potash feldspar, 60% commercial soda feldspar, 10% soda‐lime feldspar showed 6 o'clock deformation when cone 6 showed 1 o'clock deformation, this being the lowest temperature at which any member of the system showed 6

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16982.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThis paper presents results and observations obtained from a study of metals and some metallic oxides as mill additions to eliminate or reduce reboiling of ground‐coat enamel

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16983.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThe reboiling problem was studied in the plant from three viewpoints, as follows: (1)ground coat, type of milling conditions and application; (2)processes, metal cleaning and ground‐coat drying and firing; and (3)enameling iron, source and gag

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16984.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThis paper includes consistency studies and shows variations in acid resistance occurring with concentration and the method of using sodium aluminate as a setting‐up agen

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16985.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThe effect of ZnO on sheet‐iron cover‐enamel properties was studied by evaluation of the properties of a typical sheet‐iron cover enamel in which ZnO was used as single‐ and double‐partial replacements for the various ingredients. The fluxing action of ZnO was found to be pronounced and it was markedly effective in decreasing frit solubility in the mill liquor. Improvement in gloss resulted from its use without any adverse effect on enamel extensibility and resistance to ther

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16986.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTBy the use of X‐ray methods, sheet‐iron cover‐enamel frits and fired enamels were investigated. The results obtained show that tin oxide exists as tin dioxide in the enamel, antimony as antimony pentoxide, fluorspar as calcium fluoride, and cryolite as sodium fluoride. Zirconium oxide does not exist as the crystalline zirconium oxide even when present as a mill addition. Variations in the compositions of the ordinary sheet‐iron cover enamels do not affect the identity of the c

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16987.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThe thermal expansions of sheet‐iron ground‐coat enamels were determined by use of the interferometer. The results showed that the calculated expansions based on the factors of Mayer and Havas were close to the actual expansions. It was also shown that variations of borax, feldspar, and quartz resulted in a fairly uniform change in the expansion. It was possible to interpolate between values for these constituents. The softening of the enamels in the interferometer test proved to be a characteristic change depending on the fusibility of the enamel. These data showed promise as a test for fusibil

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb16988.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY