ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13041.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13042.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY

摘要:

Some color characteristics of ceramic glazes that are important in industrial design and specification are described in terms of the fundamental parameters of colorimetry. Algebraic expressions are developed to relate the spectral reflectance of a specularly transmitting glaze on an opaque bisque with the glaze thickness, interfacial reflectance, absorption coefficient, and colorant concentration. These expressions are shown to describe accurately the spectral reflectance of some test tile. Changes in dominant wave length, purity, and luminous reflectance are considered with glaze thickness as the independent variable. The dichroic effect associated with glaze‐thickness difference in a purple tile is illustrated. A relationship between glaze‐thickness difference and allowable color tolerance is outli

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13043.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY

摘要:

Glasses of high X‐ray, thermal‐neutron, or combined X‐ray and thermal‐neutron absorptivity and satisfactory technological properties were developed: lead tantalum (niobium, thorium) borate, phosphate, and germaniate glasses for X rays, cadmium‐titanium‐zirconium borates for thermal neutrons, and lead cadmium borates for their combination. These glasses were compared with know

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13044.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY

摘要:

The load‐bearing characteristics of commercial superduty, high duty, and siliceous fire‐clay classes of refractories were studied and the results discussed in terms of optimum testing methods and possible service applications. Standard 9‐in. straights were tested, using an electrically heated (Globar) furnace designed to permit simultaneous testing of two brick placed on end. The brick were subjected to a load of 25 lb. per sq. in., and the continuous vertical linear change was measured with revolving‐drum kymographs. The brick were tested under the following conditions (a) 11/2‐hour hold at 2460°F., (b) 24‐hour hold at 2400°F., (c) 100‐hour hold at 2200°, 2400°, and 2500°F., and (d) 500

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13045.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY

摘要:

The oxidation of Tic‐base cermets can be minimized if two processes are stopped: (1) diffusion of oxygen into the cermet body and (2) diffusion of cermet components through the oxide to the oxide‐air interface. Two methods of curtailing these diffusion processes are considered: (1) the formation of an amorphous glassy oxide and (2) the formation of oxidation products which enable certain types of crystalline oxides to occur in a definite order. Both these methods are discussed by means of representative examples. The cermet TiC‐TiB2‐CoSi represents the first method; the cermet (Ti, Ta, Nb)C + Co represents the second

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1952.tb13046.x

出版商:Blackwell Publishing Ltd    

年代:1952

数据来源: WILEY