ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18320.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTIn an earlier paper2the authors have given the particle analysis and other tests of a number of English china clays, one English ball clay and several domestic kaolins. In this paper are presented the following additional data for the same clays: the carbon content as a measure of organic matter; the change in state of dispersion with pH for 20% slips as determined by settling tests; the change in viscosity with pH as determined with 40% slips; the alkali absorption for 20% and 40% slips. The more plastic clays are characterized by high organic content, high alkali absorption, and dispersion at low pH. Casting slips made up with the different china clays and two ball clays in varying proportions show that ball clay causes fluidity and that the plastic china clays produce more viscous slips than the less plastic.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18321.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTThe flexibility and economy of single‐fire overglazes as compared with other polychrome methods are emphasized. Insoluble materials are preferable. A base white overglaze formula and its preparation and application are given. These single‐fire overglazes have been used commercially with excellent resu

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18322.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTThe physics of mechanical removal of water from clay involves character of pores, adsorption capillarity and it also involves air filled cavities. Theory of clay particle system when plastic is set forth and argument is made for the effect of air on water removal and on drying shrinkage.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18323.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTSilica shapes from coke ovens were tested to see what change had occurred after long service. Brick from Chicago and Birmingham districts were examined. Chemical analyses: specific gravity, porosity, fusion values and petrographic examinations were obtained on the samples.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18324.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18325.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTThe compositions of window glasses manufactured by various methods are compared. The tendency of glass to devitrify and ways of overcoming this are discussed, using diagrams based on the work of Morey and Bowen to illustrate the various points.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18327.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

摘要:

ABSTRACTA differential thermal method for determining interval specific heats of ceramic materials is described. The specific heat of the unknown is determined by comparing its temperature to that of quartz after each sample has been subjected to a definite heat treatment. This method shows the number of calories required to heat one gram of the material in question from 0 to t°C, accounting for all thermal processes which the material may undergo during the heating process. It shows the temperatures at which the various thermal processes begin and end as well as the quantitative figures for the more pronounced of these thermal processes.The kaolin, ball, flint, and diaspore clays undergo an endothermic reaction at about 575°C which amounts to “60 to 130” calories per gram of the air dried material. They undergo an exothermic reaction at about 960°C which amounts to about 25 calories per gram of the air dried material. About 510 calories are required to heat one gram of any firebrick body from 25 to 1200°C, the specific heat over this interval being about 43. About 500 calories are required to heat one gram of any kaolin or ball clay from 0–1000°C, the specific heat over this interval being about 5. About 290 calories are required to heat one gram of flint or feldspar from 0–1050°C, the specific heat over this interval being about 28.Instead of the kiln efficiencies being about 22% as was previously believed, this work proved them to

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18328.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18330.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1926.tb18331.x

出版商:Blackwell Publishing Ltd    

年代:1926

数据来源: WILEY