摘要:

ABSTRACTA description is given of a furnace and accessories for the determination of the co‐efficient of expansion of glasses. Suggestions are presented which may lead to the useful application of the method for the determination of the coefficient of expansion of materials in the high‐temperature ra

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19188.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTA microscopic examination was made on those clays and shales of North Carolina which gave most promise of future development in the structural clay products industry. The more common minerals were determined rather than the rare ones which did not occur in sufficient quantity to affect the quality of the clay. The work showed clay substance to be the most abundant material present, followed by quartz, red and yellow iron oxides, muscovite through sericite to hydromica, and epidote, with smaller amounts of rutile, biotite, titanite, tourmaline, and zircon. Diatoms were found in two cases and kaolinite in one.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19189.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThis is a record of the results of five years' research on refractory uses for a chemically purified grade of zircon and electrically fused zirconia of high purity. The products investigated included semi‐permanent foundry molds, refractory brick and cements, ladle nozzles, and crucibles. Electric firing and a small oil‐fired tunnel kiln are described. Sintered zircon grog was found superior to electrically fused grog. Zircon brick made with 50% grog, using 20% milled zircon for the permanent bond and fired at 1600OC for an hour, showed no firing shrinkage, very slight volume change, and high compressive strength at 1600°C. They were extremely resistant to spalling but did not resist basic slags or metallic oxides very well at high temperature. Zircon‐bonded magnesite brick were more refractory than ordinary magnesite, more resistant to spalling, and had about the same slag resistance as magnesite. Zirconia was more refractory than zircon and had better slag resistance. Lime‐bonded zirconia crucibles of good spalling resistance were made, but the cost was higher than that o

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19190.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTA résumé is given of the geology, general ceramic properties, and uses of the shales and alluvial clays of Georgia, based on a study by the Georgia Geological Survey. The conclusions were derived from seven months of field work and from ceramic tests on 115 samples from private properties and active plants

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19191.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

摘要:

ABSTRACTThe commercial underclays of Indiana are used extensively in the manufacture of heavy clay products in that State; the use of native underclays for making pottery and refractories has been comparatively limited. Field and laboratory data relating to those underclays now being utilized by the clay plants of the State are summarized. The data, for the most part, are based upon field observations and laboratory tests made by the writer. The underclays are discussed with reference to their stratigraphical occurrences, physical characteristics in the outcrop, and physical properties as determined in the laboratory by chemical analyses and fire tests. The data selected for each underclay horizon are representative of the average quality of the clay used commercially from that horizon. Brief mention is made also of the qualities of underclays in horizons other than those being utilized a t the present time.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19192.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19193.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19194.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19195.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19196.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1933.tb19197.x

出版商:Blackwell Publishing Ltd    

年代:1933

数据来源: WILEY