Preparation of CaCu3Ti4O12 by Wet Chemical Synthesis Method and its Dielectric Mechanism

由于电子线路呈现微型化、高频化的发展趋势，因而要求电子元件的尺寸越来越小，同时要求可靠性高、集成度高且价格低廉。近年来一种新的具有巨介电常数的体心立方钙钛矿结构的材料CaCu3Ti4O12(CCTO)引起了研究人员的关注。这种材料的研究不仅具有理论上的意义，还在于实际应用方面。搞清CCTO巨介电常数的产生机理就显得尤为重要，本文从湿化学合成方法的角度出发，研究了CCTO的介电性能方面的问题。与同类研究相比，本文旨在突出研讨CCTO中的主要缺陷结构及其分布对其介电性能的影响的重要性。 首先采用Sol-Gel方法合成CCTO粉体，并分别在空气气氛和纯氧气氛中进行烧结制备CCTO陶瓷样品。实验结果...Due to the development trend of high-frequency of electronic circuits in recent years, the small size, high reliability, high integration of electronic components and low price is required. A new unusual giant dielectric constant of cubic perovskite structure of materials CaCu3Ti4O12 (CCTO) attracted the attention of researchers. Understanding the high dielectric constant mechanism of CCTO is part...学位：工学博士院系专业：材料学院材料科学与工程系_材料学学号：2072007015346

一种平板型电极支撑的陶瓷电解质电池堆

本发明提供了一种平板型电极支撑的陶瓷电解质电池堆，其电池结构单元具有中空上下分布的电极支撑型结构，在非支撑电极层表面设置金属连接件，金属连接件设置气体通路，并且金属连接件的周围与非支撑电极层密封接触、内部与非支撑电极层形成中空腔体，气体自气体通路入口进入后流通至中空腔体，自气体通路出口排出；支撑电极层侧面设置也金属连接件，该金属连接件设置气体通路连通中空通道的进出口端。该电池结构简单、紧凑、密封，实现了气体在该电池结构单元中的动态平衡，并且能够提高燃料气体与氧化剂气体的利用率，从而提高电池性能

内倾特质个体的自我参照加工程度效应

采用事件相关电位技术和三类刺激的经典oddball范式,以内隐的方式探讨内倾特质个体的自我参照加工程度效应及其神经机制。实验发现,在P2的波幅上,在头皮前部电极、头皮前中部电极和中部电极高自我相关的刺激比其它刺激诱发了更大的P2波幅。在P2的潜伏期上,在头皮前部电极、中部电极、和中后部电极高自我相关的刺激比其它刺激诱发了更短的潜伏期。在N2的波幅上,高自我相关名字比其它刺激在左脑所诱发了更大的P2的波幅;对比内倾特质被试,中间型被试的高自我相关名字比其它刺激诱发了更大的N2的波幅。在N2的潜伏期上,高自我相关的刺激在全脑都比其它刺激诱发了更短的N2潜伏期,且中后部电极位置的潜伏期最短;两类人格被试的高自我相关名字比其它刺激诱发了更短的N2潜伏期,但中间型人格被试的潜伏期最短。在P3平均波幅上,高自我相关的刺激在全脑都比其它刺激诱发了更大的P3波幅,其中中部脑区效应最大。研究结果表明内倾特质个体的自我参照加工具有程度效应,但对比中间型个体,内倾特质个体的自我参照加工的程度效应更弱。</p

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies