共查询到20条相似文献,搜索用时 15 毫秒
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《Microelectronics Reliability》2014,54(12):2836-2842
The effect of sintering temperature on clamping characteristics and pulse aging behavior of V2O5/MnO2/Nb2O5 co-doped zinc oxide varistors was systematically investigated at 875–950 °C. Experimental results related to varistor effect showed that the breakdown field decreased dramatically from 6830 to 968 V/cm with the increase in the sintering temperature and the non-ohmic coefficient exhibited a maximum (49.5) at 900 °C in the sintering temperature. Varistors sintered at 900 °C exhibited the best clamp characteristics for the pulse current of 1–100 A, with the clamp voltage ratio of K = 1.86–2.77. Varistors sintered at 875 °C exhibited the strongest stability; variation rates for the breakdown field, for the non-ohmic coefficient, and for the leakage current density were −14.2%, −63.6%, and 59.0%, respectively, after application of a multi-pulse current of 100 A. 相似文献
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Nb2O5掺杂对ZnO压敏电阻器电性能的影响 总被引:5,自引:1,他引:4
本文研究了Nb_2O_5掺杂以及Nb_2O_5与ZnO煅烧对ZnO压敏电阻器电性能的影响。实验表明,Nb_2O_5的掺入使压敏电场减少,当Nb_2O_5含量为0.1%mol时,其压敏电场最小.非线性系数最大。煅烧温度越高,压敏电场越高,非线性系数越大。 相似文献
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研究了MnCO3掺杂对SnO2-ZnO-Nb2O5压敏材料压敏-介电性能的影响,研究中发现,掺入x(MnCO3)为0.08%的样品显示出最高的非线性系数(α=8.2),最高的势垒高度(φB=1.11eV),最高的击穿电场(E=466.67V/mm)。研究中同时发现,SnO2-ZnO-Nb2O5压敏材料的相对介电常数在573~673K间出现峰值,峰值随MnCO3掺入量的增加而增大,掺入x(MnCO3)为0.3%的样品在593K时,显示出最高的相对介电常数(εr=1.886×104)。 相似文献
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内电极浆料对Bi2O3—ZnO—Nb2O5瓷料相组成的影响 总被引:2,自引:0,他引:2
研究了瓷料与内电极浆料的共烧工艺中,内电极浆料对Bi2o3-ZnO-Nb2O5资瓷料相组成的影响。XRD分析表明,Bi2O3-ZnO-Zb2O5瓷料是焦绿石立方α相与低对称β相构成的复相体系。 相似文献
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Sladkopevtsev B. V. Kotov G. I. Arsentyev I. N. Shashkin I. S. Mittova I. Ya. Tomina E. V. Samsonov A. A. Kostenko P. V. 《Semiconductors》2019,53(8):1054-1059
Semiconductors - Complex oxide films with a thickness of about 200 nm are formed during the thermal oxidation of GaAs with magnetron-deposited V2O5 and MnO2 nanolayers. The electrical parameters of... 相似文献
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研究Nb和La双施主掺杂对SrTiO3陶瓷氧敏性能及半导化的影响,采用固相法合成了La、Nb复合掺杂的钛酸锶Sr1-xLaxTi1-xNbxO3(x=0,0.001,0.01,0.03,0.05,0.1)钙钛矿复合系氧化物。研究不同的La,Nb掺杂量对氧敏材料灵敏度、电导率的影响,对合成氧敏元件在高温下的氧敏性能、电导性进行了测定。结果表明,双施主掺杂不仅可促进SrTiO3陶瓷半导化,而且对氧敏元件灵敏度有重要影响,x=0.3 时呈现出理想的氧敏特性。 相似文献
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The Yb2O3 component was introduced into the Er3+/Ce3+ co-doped tellurite glasses with the composition of TeO2-WO3-Na2O-Nb2O5 to study the effect of Yb3+ on the 1.53 μm spectroscopic properties of Er3+. The X-ray diffraction (XRD) curve and Raman spectrum were measured to investigate the structure nature of synthesized tellurite glasses. The absorption spectrum, upconversion emission spectrum and fluorescence spectrum were measured to evaluate the improved effect of Yb3+ concentration on the 1.53 µm band fluorescence of Er3+. Results of the measured 1.53 µm band fluorescence intensity show a significant improvement with the increase of Yb3+ concentration, while the total quantum efficiency reveals a similar increasing trend. The results of the present work indicate that Er3+/Ce3+/Yb3+ tri-doped tellurite glass has good prospect as a promising gain medium applied for the 1.53 µm broadband amplifier. 相似文献
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稀土Ce对SnO2·Co2O3·Nb2O5压敏性能的影响 总被引:1,自引:0,他引:1
研究了掺Ce对SnO2·Co2O3·Nb2O5压敏电阻器性能的影响。研究发现Ce4+对Sn4+的取代能明显提高陶瓷的致密度,掺入x(CeO2)为0.05的陶瓷样品具有最高的密度(ρ=6.71g/cm3),最高的视在势垒电场(EB=413.6V/mm),最高的非线性系数(α=13.8),最高的势垒电压和最窄的势垒厚度。为了解释样品电学非线性性质的起源,该文提出了SnO2·Co2O3·Nb2O5·CeO2晶界缺陷势垒模型。同时,对该压敏电阻器进行了等效电路分析。试验测量与等效电路分析结果相符。 相似文献
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《Applied Superconductivity》1999,6(10-12):553-557
RSFQ-toggle-flipflops with a SFQ-trigger circuit a Josephson transmission line at the input and a SFQ/dc-circuit at the output of each stage are implemented in the Nb–Al2O3–Nb Josephson junction technology on a single chip having coplanar wave guides at input and output. The counter is tested successfully at 4.2 K via coplanar/coaxial transitions using a bit pattern generator and a digital oscilloscope at room temperature up to fI≈2 GHz pulse repetition frequency at the input. The highest test frequency fI is limited by the available pattern generator. 相似文献
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研究了BaTiO3-Nb2O5-Zn0.8Mg0.2TiO3系统的介电性能及微观性能。SEM和XRD分析发现,在掺杂x(Nb)=1%的BaTiO3陶瓷中,Zn0.8Mg0.2TiO3的固溶度小于4%。Nb2O5和Zn0.8Mg0.2TiO3用量均为1%时,BaTiO3陶瓷为赝立方相结构,当x(Nb)>2%时,陶瓷样品(002)和(200)衍射峰相互分开,研究表明,BaTiO3陶瓷为四方相,且随着Nb用量增加,四方率增强。此外,Nb用量增加还使BaTiO3陶瓷室温介电常数降低,而同时居里点升高。当x(Nb)=2%和x(ZMT)=1%时,在空气中于1 180℃下烧成的BaTiO3陶瓷材料的主要性能指标为:298 K时介电常数2ε98 K=2 004,介电损耗tanδ=0.84%,密度ρ=1.4×1012Ω.cm,-55~ 150℃,电容量温度变化率△C/C≤±15%。 相似文献
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玻璃万分及含量对ZnCr2O4—V2O5—Li2O—ZnO系湿敏电阻器性能的影响 总被引:1,自引:0,他引:1
在玻璃相LiZnVO4中加入一定的B2O3能够降低湿敏电阻器的本体电阻值。当LiZnVO4含量发迹时对湿敏电阻器的感湿灵敏度影响较大,玻璃相含量(摩尔分数)为12%时感湿灵敏度最高。本文对上述结果给出了解释。 相似文献