摘要:

ABSTRACTAn attempt to make use of the red color of basic lead chromate in a glaze maturing about cone 08.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09659.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY

摘要:

ABSTRACTExperiments were conducted to find a palette of colored bodies which could be worked, and their proper glazes. The formulas obtained are given.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09660.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY

摘要:

ABSTRACTTwo test methods, one using an Ingersoll glarimeter to obtain results of a high degree of accuracy, and the other simpler “alternate method” for plant control, are described in detail. Tests on commercial hotel chinaware showed the average resistance of foreign ware was higher than that of the domestic and the variation from the average was, in general, less. Experimental glazes were prepared to study the effect on resistance, of: (1) varying SiO2and Al2O3content, (2) glaze thickness, and (3) firing treatment. Data obtained are insufficient to justify definite conclusions regarding the effect of varying SiO2and Al2O3, but do show the resistance of well‐matured glazes to be inversely proportional to thickness, a decrease in resistance as the tendency to matt increases, a markedly increased resistance by the higher glost fire. That type of body affects resistance less than do glaze composition and temperature of glost

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09661.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY

摘要:

ABSTRACTA brief review is given of the apparatus used for determining the resistance to impact of ceramic materials, namely, apparatus of the “pile driver” type and of the pendulum type. A Charpy (pendulum) transverse impact machine of 2 ft.‐lbs. maximum capacity suitable for porcelain has been built and is described. Specimens from 1/2 to 11/8 inches in diameter can be accommodated on movable supports. Data were obtained for 1/2, 3/4, 1, and 11/8 inch diameter cylinders of wet process porcelain on a 4‐inch span, the average values for 1/2‐inch diameter being 1.24 ft.‐lbs. per sq. in., and the average value for 3/4, 1, and 11/8 inches being 1.53 ft.‐lbs. per sq. in. with an average deviation from the mean of about 2.5%.Data on specimens of wet process porcelain 1/2, 3/4, 1, and 11/8 inch in diameter fractured on 4‐ and 5‐inch spans give equivalent values for the modulus of rupture. The average of all values is 11,000 pound

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09662.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY

摘要:

ABSTRACTA review of the clay purification methods which are used at the present time is given, together with a description of a simple laboratory continuous clay‐washing plant composed of a screw feed, a rotary blunger, sand separator, cone‐bowl classifier, and settling tanks. The methods of operation with a sample of Pacific Northwest kaolin and the results obtained are descri

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09663.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY

摘要:

ABSTRACTA study has been made of some of the properties of clays, grogs, and body mixtures used by various zinc smelters for the manufacture of zinc retorts. Only minor differences were observed in the properties of the clays. No attempt has been made to offer any of the results as conclusions. The investigation tends to confirm the following points; that the use of reclaimed retort material in the grog for new retorts is of doubtful economy; that, if old bricks or shapes are used as grog, care should be taken that they were originally made of good quality clay and that they are free from slag; that some flint clay of good quality and properly calcined is advisable for at least a part of the grog; and that zinc in a clay or body mixture markedly affects the refractoriness by lowering the deformation value.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1927.tb09664.x

出版商:Blackwell Publishing Ltd    

年代:1927

数据来源: WILEY