ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15779.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractA method of using a water elutriator in combination with screen tests to determine the fineness distribution of milled enamels is described. Results of tests of milled enamels which were ground under various conditions are given.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15780.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractThe results of various experiments dealing with the behavior of ground‐coat enamels are given. Hydrogen causes metallic nickel or iron to separate from regular molten ground coats, while the gases evolved from sheet iron cause metallic copper to form from molten copper‐bearing glasses and metallic iron to form from regular molten ground coats. Ground coats have only a slight volatilization loss at 1600°F. Because CuO decomposes when heated in absence of oxygen or with iron or FeO, the various experiments performed suggest that glass solutions of CuO are oxidizing and are reduced by such reducing agents as H2, CO, FeO, CoO, NiO, MnO, an

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15781.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractChemical methods were investigated and are described for studying the products formed in fired ground‐coat enamels. The results obtained show that (1) the metallic particles are essentially iron with a trace of nickel, (2) a film of free FeO exists between glass and iron, (3) total FeO content increases with firing time, but the NiO and CoO content remains constant, and (4) no metallic cobalt and only a trace of metallic nickel is present on the iron surface on which ground coats have been fired and then remove

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15782.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15783.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractThe degree of grinding dry‐process enamels has a marked effect on the packing of powder on the balls and mill walls, on the loss due to convection currents during the dusting operation, and on the ease with which the powder goes through a vibrating screen. The use of small amounts of water in the mill during grinding is beneficial to all these powder characteristic

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15784.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractIn the course of some phase‐rule investigations of the ternary system K2O‐4SiO2‐Fe2O3‐SiO2by the “quenching method” of Shepherd, Rankin, and Wright, the refractive indices of 30 glasses were measured by the usual petrographic immersion method. The refractivities varied from 1.438 for a K2O‐7SiO2glass to 1.621 for the most ferriferous glass which contained 32.3% Fe2O3. The maximum FeO content reached a value of 0.33 % in a glass originally containing 25 % Fe2O3. Along the sections K2O 4SiO2, K2O‐5SiO2, K2O‐6SiO2, and K2O‐7SiO2, the relation between the Fe2O3content of the glasses and the refractive index is apparently linear. The isofracts, however, in the ternary syst

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15785.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractClays, when given a correct alkali treatment, show a marked improvement in working qualities. They become more plastic, require less power to extrude the clay through the die, and, when dried, have greater strength and are less pervious to water. The tendency of clays to laminate is reduced. The fired ware is stronger and has a lower moisture absorption. Both acid and calcareous clays are susceptible to improvement by this process. The amount of reagents must be carefully controlled bypHmeasurement for best results. The method of testing forpH. and the limits within which the two type clays must be held are described.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15786.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY

摘要:

AbstractResults of a few tests made on pyrophyllite bodies are recorded for the benefit of others interested in the application of that material to their use. Physical and electrical data are tabulated.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1938.tb15787.x

出版商:Blackwell Publishing Ltd    

年代:1938

数据来源: WILEY