ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16606.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.tb16607.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.tb16608.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.tb16609.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.tb16610.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTIt is found from a survey of the important researches on building stones and heavy clay products in the last fifty years that the strength data may be formulated by the lawwherep= stress at rupturec= efficiency or relation factorS= parameter of dimensions stressA= per cent of sensible pore space determined by degree of absorption vater by weightA0= parameter, taking account of the insensible or colloidal pore spacee= probable error for a single datumThe working law obtained where it was possible to place the data on a strict mechanical parity isfor the compression strengths and a conservative value of ⅙ of this amount for the modulus of rupture, the latter varying from ⅙ to ¼ depending upon the particular technique of tests. The probable error has been selected at ±0.25 but is usually smaller, this also being conditioned by manipulative technique. It is ½ this amount for five tests and ⅓ for ten tests, the variations now existing being considerably reduced by precise methods of

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16611.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTThe elasticity of quartz varies markedly with temperature, with an abrupt break at This paper is the result of a few preliminary tests t o ascertain the effect of quartz The results seem to indicate that the elasticity 573”. on the elasticity of a ceramic material. of a ceramic body is not dependent upon the nature of the nonplastic presen

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16612.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTA fusion test furnace which can produce results up to cone 37 with less than ¼ of a cone error is described. A reducing atmosphere around the cone plaque, which is the most frequent cause of faulty results in other fusion test furnaces, has been eliminated by the use of oxygen and acetylene gases and (2) synchronized valves which automatically provide an oxidizing atmosphere in the furnacc at all times. The temperature around the cone plaque is remarkably even due to the ample circulation of gas in the furnace. The furnace is built in one portable unit weighing 115 pounds. It is easy to operate. The fusion test furnace should be a valuable instrument for making routine control tests in the plant as well as for making precision tests in the laboratory

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16613.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTA brief account is given of published methods for making high‐temperature furnaces using W and Mo windings, placed both internally and externally with respect to the furnace tube.Several new methods of furnace construction are here mentioned:1A furnace tube may be built up of a series of rings made of refractory substances for external windings.2A furnace tube may be built up of a series of tall and flat rings, alternately placed, made of refractory substances for an internal winding, the winding being threaded through small holes drilled in the flat rings.3A zigzag winding with welded joints has been developed for W and Mo wire. The winding may be conveniently sheathed with refractory tubes, as the winding runs the length of the furnace tube.The entire zigzag winding may be put in series, or divided into a split parallel winding, each type having its own advantages and faults.4Details of windings and refractories for furnaces reaching 1600°C and 2000°C are given. Windingq are protected from oxidation by hydro

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16614.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY

摘要:

ABSTRACTThe application of insulation to regenerator chambers whether existing or new has resulted in savings which exceed the calculated results, because insulation properly applied is effective in reducing air leakage, in giving more accurate combustion control, and of equal importance, the proper insulation as to amount and method of application has no possible ill effect on the refractories of the regenerators.

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1931.tb16615.x

出版商:Blackwell Publishing Ltd    

年代:1931

数据来源: WILEY