低损耗中高压陶瓷电容器国产化研究(Ⅱ)——结构模型和计算模拟

提出在化学组成不同的两种煅烧料共混制得的陶瓷材料中可能存在“两相结构”与“壳芯结构”共存的化学不均匀分布状态。电子计算机模拟的结果表明,合理控制工艺条件可以使陶瓷材料的介电温谱呈现“双峰效应”,满足彩电国产化对中高压陶瓷电容器的多方面性能要求

低损耗中高压陶瓷电容器国产化研究(Ⅰ)——介质材料的配方研究

在理论分析的基础上,利用正交试验,对烧成温度及介质材料组成进行优选。结果表明:最高烧成温度T_s=1220℃和介质材料组成为:0.7(Sr_(0.20)Pb_(0.55)Ca_(0.25))TiO_3·0.3(Bi_2O_3·3TiO_2)是最佳选择。优化成功的配方已经用于制备温度系数为2C和2R的低损耗中高压陶瓷电容器

低损耗中高压陶瓷电容器国产化研究(Ⅳ)——工业化生产的应用研究

通过采用高速离心喷雾干燥造粒、无边镀Ni-Sn电极、阻燃性环氧树脂包封和可靠性工艺控制方法等一系列工业化生产的应用研究成果,实现了把实验室研究成果尽快推广应用到工业化批量生产的目的,完成了低损耗中高压陶瓷电容器国产化的全部研究工作

低损耗中高压陶瓷电容器国产化研究(Ⅲ)——“双峰效应”的实验验证

根据计算机模拟的预期结果,通过适当控制配方和工艺参数,获得了具有明显“双峰效应”介电特性的陶瓷材料,并制备成功符合彩电要求的低损耗中高压陶瓷电容器。有关的介电性能检测、微观结构分析、显微形貌及其微区元素分析的结果表明,在此陶瓷体内可能存在“两相结构”与“壳芯结构”共存的化学不均匀分布状态

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