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碳相含量对C—SiC—TiB2复合材料结构和力学性能的影响 总被引:2,自引:0,他引:2
研究了碳相含量对原位合成的碳/陶复合材料(C-SiC-TiC-TiB2)的结构和性能的影响。结果表明:随着碳含量的增加,材料的抗弯强度下降。材料的烧结温度应随着碳含量增加相应的提高,才能获得致密的碳/陶复合材料 相似文献
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A ferroelectric memory diode that consisted of Au/PZT/BIT/p-Si multilayer configuration was fabricated by pulsed laser deposition (PLD) technique. The reliability issues (I-V characteristics, capacitance retention, fatigue and imprint) were investigated. The I-V curve showed the conventional Schottky diode characteristics with a small current density of - 5.3×10 -10 A/cm2 at a voltage of - 4 V and 6.7×10-8 A/cm2 at a voltage of + 4V, and this characteristic can be maintained below 50℃. The capacitance variety of the ferroelectric diode was only 5 % in 10 hours after withdrawing the applied bias of + 5 V or - 5 V, indicating the diode had good capacitance retention. By applying 100 kHz bipolar pulses of 5 V amplitude, the decay in remanent polarization was only 10% after 109 switching cycles, and meanwhile the increase in coercive field was 12%. After being irradiated for 20 min with a 200 W ultraviolet ray lamp, the remanent polarization and coercive field had both varied, and a voltage shift was obse 相似文献
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为稳定冬季浓香型白酒的产质量,为度夏压排打下基础,采用调节入窖淀粉浓度至15%~16%;辅料用量第一排28%,第二排25%,第三排30%,第四排25%,以后不变;高温曲用量6%。试验结果表明,基础酒未出现苦味现象。还叙述了冬季发酵异常池口的生产工艺调节方法等。(一平 相似文献
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碳化硅材料具有许多优良的性能,采用原位合成碳化硅基复合材料已经成为当前研究的一大热点。本文对近年来采取原位合成TiB2来增强增韧碳化硅基复合材料作了简要综述。 相似文献
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介绍了在浓香型白酒生产中,采用低温生产高温压窖措施度夏应注意的一些问题,以及度夏酒醅窖池的管理要点,并说明了该措施的良好效果.(弓长) 相似文献