ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16582.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16583.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16584.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16585.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16586.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTThis report presents the results obtained in a study of sagger bodies and represents an enlargement of a similar study of a preliminary nature, the results of which have been published. The clays and grogs are combined to give bodies having wide variations in body structure and in the several properties which were studied. Data are given on the modulus of elasticity, transverse breaking strength, plastic flow, thermal expansion, and resistance to failure due to heat shock of thirty‐five laboratory prepared bodies and ten commercial bodies after firing at from one to three different temperatures. For comparative purposes data are given on two series of bodies, the one series containing coarse grog and the other fine grog. In addition body compositions were varied in order to compare the effect on sagger life of using open‐ and close‐firing

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16587.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

Book reviews in this article:Economic Control of Quality of Manufactured Product. W. A. Shewhart.Colloid Chemistry in Ceramics. (Kolloidcliernie in der Keramik.) HansKohl.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16588.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTSome andalusite refractories are high in transverse strength. Bars 12 inches long, 2 inches wide, and 1/2 inch thick tested across an 11‐inch span supported a 45‐pound load with 13/32‐inch sag at cone 161/4and a 1/2‐pound load at cone 34 down with 1/16‐inch sag. A standard 9‐inch brick tested under a load of 50 pounds per square inch at 1525°C showed no deformation. They are relatively constant in volume, are not affected by kiln gases, and tend to improve rather than to deteriorate under continued heating owing to the formation of an increased amount of mullite. Andalusite saggers used at cone 12 are estimated to have stood 180 cycles and are still in good condition. Saggers in continuous use at cone 161/4have an estimated average age of 11/2years and many are four years old. The andalusite lining of a periodic kiln being fired regularly at 3000 to 3200°F is still serviceable after 110 firings. Cars built of andalusite refractories have given five years of continuous service in tunnel kilns operating at cone 161/4, whereas cars built of fireclay refractories were unfit for use after three to four months. Side walls, damper boxes, expansion sleeves, and flame shields of Dressler tunnel kilns operating at cone 161/4have proved

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16589.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTA brief review is given of previous work pertaining to proportioning of the particle sizes. Experimental work presented has to do with the proportioning of three sizes of flint clay. To the proportioned particle sizes there were added different amounts of plastic or bond clay. There are given the effects of proportioning upon density, porosity, and change during firing. Clays from two producing districts were used, and although the experimental work on these was comprehensive, similar work should be continued in plant‐scale operations. The summary presents the benefits which may be expected from proportioning particle sizes of fireclay mixes used in refractorie

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16590.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTA study of the dry‐pressing characteristics of several fire brick and building brick clays was made by compressing them, at high and low pressures, into large shapes with a hydraulic press The clays do not effectively transmit the pressure into the interior. The finest grained clays are morc deficient in this respect. The result is a porosity gradient as high as 15% of the interior porosity between center and surface. Such a variation may account, in part, for the defects in dry‐press ware. The addition of fired grog increases the pressure transmission. Some clays require more than 50% grog and some less for maximum pressure transmission and optimum results. Fireclay shapes as much as ten inches in thickness and of substantially uniform physical properties can be formed if the proper amount of grog is u

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16591.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY