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TRANSMISSION ELECTRON MICROSCOPY OF SEGMENTED POLYURETHANES WITH RUTHENIUM TETROXIDE AS A STAINING AGENT
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作者 肖凤飞 陈寿羲 +2 位作者 金永泽 施良和 徐懋 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 1991年第3期246-250,共5页
Microphase separation and lamellar structure of segmented polyether- and polyester-polyurethanes have been investigated by means of transmission electron microscopy with the ruthenium tetroxide staining technique. The... Microphase separation and lamellar structure of segmented polyether- and polyester-polyurethanes have been investigated by means of transmission electron microscopy with the ruthenium tetroxide staining technique. The results show that the RuO_4 staining technique is simpler and may give better image contrast than other staining methods for this polymer. Microphase separation and lamellar structure of segmented polyether-and polyester-polyurethanes were directly observed and discussed. 展开更多
关键词 microdomain structure LAMELLAE Ruthenium tetroxide stain Segmented polyurethane.
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La掺杂的低损高效钙钛矿储能介质陶瓷研究 被引量:1
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作者 张春梅 刘敬松 +2 位作者 曾梦诗 李惠琴 余洪滔 《电子元件与材料》 CAS CSCD 北大核心 2020年第6期37-43,49,共8页
采用固相反应法制备了(1-x)Sr0.7Pb0.2Bi0.1TiO3-xLa2O3(x=0.00%,0.03%,0.06%,0.09%,0.12%,0.15%)介质陶瓷。研究了La3+不同掺杂量对SPBT介质陶瓷弛豫特性和介电性能的影响。利用阻抗分析仪和透射电子显微镜分别证明了弛豫特性和微畴结... 采用固相反应法制备了(1-x)Sr0.7Pb0.2Bi0.1TiO3-xLa2O3(x=0.00%,0.03%,0.06%,0.09%,0.12%,0.15%)介质陶瓷。研究了La3+不同掺杂量对SPBT介质陶瓷弛豫特性和介电性能的影响。利用阻抗分析仪和透射电子显微镜分别证明了弛豫特性和微畴结构的存在。原子力显微镜分析结果表明掺杂La3+促使微畴汇聚长大。由于微畴结构具有低的钉扎效应,在8000次循环充放电测试后,放电曲线与初始曲线基本重合。当La3+掺杂量增加到0.12%(摩尔分数)时,该介质陶瓷表现出98.6%的高能量释放效率和约0.03%的最低介电损耗。 展开更多
关键词 放电效率 介电损耗 掺杂 微畴结构 晶界结构 弛豫特性
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