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31.
The effects of alkali and alkali-earth chloride additives on the sintering of ZnS powder compacts in H2 S have been examined. BaCl2 was found to promote the sintering of ZnS. BaCl2 reacts with ZnS to form Ba2 ZnS3 , which acts as a flux for sintering. 相似文献
32.
燃油中硫含量对颗粒物排放和气体排放的影响 总被引:6,自引:0,他引:6
着重阐述了燃油中硫含量与排放颗粒物直径和浓度的关系。通过在船用燃油(MDO)中混入二硫化物((CH3 )3CS-)2(DBDS)调整燃油中的硫含量,对柴油发动机排气进行测量和分析,对可溶性有机物质SOF(Sol-uble Organic Fraction)的浓度,非可溶性物质DS(Dray Soot)的浓度以及排放颗粒物PM的质量浓度以及颗粒物直径的分布进行了分析研究。试验结果表明:随着硫含量的增加,PM直径变小,但是质量浓度增加;SOF质量浓度和DS质量浓度增加,因此PM的质量浓度也增加;发动机的着火迟延期变短,最高燃烧压力降低,同时CO排放浓度增加,N O排放浓度降低。 相似文献
33.
FUJITA Toshio 《金属学报(英文版)》1992,5(2):95-100
The effect of W on mechanical properties of 12% Cr-W-V-Nb heat resistant steel at hightemperatures and room temperature is reported.The experimental results indicated that if theW content was about 2.2—3.0 wt-%,there was no obviously change of R.T.tensile strength,but impact toughness decreased with the rise of W content.On the other hand,the increase ofW content enhanced the short time stress rupture strength,but did not for the long time one.The increase of W have two effects on the precipitation behavior,promoting Laves formationof type Fe_2W,increasing the precipitated phase amount and speeding up the coarsening pro-cess of precipitated phase at high temperatures.The effect of W on the mechanical propertiesis closely associated with precipitation behaviors.When the rupture life is short,there has noenough time to coarsen the precipitated phases,so the increase of precipitated phases results instrengthening effect,i.e.the W increases the high temperature strength.After prolonged expo-sure,the evident coarsening took plaee,that decreased the effect of precipitation. 相似文献
34.
MARI ANNA FUJITA 《Journal of Architectural Education》2010,63(2):8-24
This paper examines how racial politics have contributed to the complex construction of identity in a multi-ethnic and multi-faith country. The rise of Malaysia as an economic power has been accompanied by a series of ambitious building projects that explore the representational power of architecture to express Malaysian identity. Recent projects provide a context for a discussion of Kampung Baru, a highly politicized neighborhood within the Kuala Lumpur city center that will soon undergo development. 相似文献
35.
JFE钢铁公司为汽车车身开发了两种高性能高强度钢板。SFG高强度钢板“SFGHITEN”(super fine grain,超细晶粒),用于侧面板等强调深冲性能的零部件,是一种主要通过晶粒超细化达到高强度,并通过低屈服强度(低YS)、高n值(高应变硬化指数)、高r值(高塑性应变比)来实现高成形性能的超细晶粒型高强度钢板。UNI高强度钢板“UNIHITEN”(uniform uniqueuniversal,统一、独特、通用),用于车门、前机盖等部位,这种钢板具有高胀出性能,表面形状品质(抗表面变形性能)优越,冲压成形后的烤漆性能可使强度提高,从而减少板厚,并保证抗凹性能,是低豫(低屈服比)型440MPa级BH烘烤硬化钢板。对这些钢板的特征和特性进行了阐述。 相似文献
36.
MASAFUMI KOBUNE YUSUKE NISHIOKA TETSUO YAZAWA HIRONORI FUJISAWA MASARU SHIMIZU 《组合铁电体》2013,141(1):145-155
Pb(Zr0.52Ti0.48)O3 films with highly uniform c-axis orientation were fabricated on PbTiO3 (PT)/ Pt(111)/SiO2/Si(100) substrates by hot isostatic pressing (HIP) from the amorphous state. All the PZT samples HIP-treated 500°C for 1 h under gas pressures of 1.0–2.0 MPa showed the preferred (001) orientation with c-axis orientation, α > 0.80. The relative permittivity tended to decrease gently with increasing HIP pressure, whereas the dielectric loss increased almost linearly in the 1.5–100 MPa. The PZT sample treated at 1.5 MPa had a symmetric and slim hysteresis loop shape with a remanent polarization, P r = 15 μ C/cm2 and coercive field, E c = 60 kV/cm. Both samples treated at 10 and 100 MPa exhibited almost the fatigue-free behavior that resisted degradation even after 3 × 1010 cycles. 相似文献
37.
KEISHI GOTOH MASAFUMI NAKAGAWA HIROYUKI MATSUOKA 《Particulate Science and Technology》2013,31(1-2):27-36
Abstract The spatial structure of a computer-simulated random dispersion of equal spheres is investigated. The sphere of influence, i.e. the coagulation radius, is assumed for each particle without any particle movement. If the distance between sphere centers lies within the coagulation radius, the spheres are regarded as being connected to each other to form a cluster. Various sizes of clusters exist inherently in the random dispersion. The effects of the coagulation radius and the bulk-mean particle volume fraction on the size distribution of clusters are discussed theoretically and experimentally. 相似文献
38.
EMI OHASHI YUJI TAKAO TAKAO FUJITA YASUHIRO SHIMIZU MAKOTO EGASHIRA 《Journal of food science》1991,56(5):1275-1278
Characteristics were studied on In2O3 treated with 5 mol% MgO responses to 300 ppm trimethylamine (TMA), dimethylamine (DMA), ammonia and other gases evolved from several different fish muscles stored under different conditions. Sensitivities of the In2O3-MgO sensor element were higher in order of TMA, DMA and ammonia over the operating range 330–620°C. Sensor responses were directly proportional to concentrations of TMA in fish muscle in the presence of other evolved gases, irrespective of types of fish muscle or storage time. 相似文献
39.
This paper is concerned with the synthesis of a state feedback control system which possesses both integrity and good responses. System integrity in multivariable control systems is defined as the property that the overall closed-loop system remains asymptotically stable in the presence of a failure in the feedback loop. A state feedback control law which retains asymptotic stability against arbitrary actuator failure is derived using a positive semidefinite solution of a type of matrix quadratic equation, and some properties of the closed-loop system are considered. Moreover, a design procedure by which the closed-loop system has the desired dynamical characteristics while maintaining integrity is proposed, and the effectiveness of the procedure is demonstrated with a numerical example. 相似文献
40.