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熔盐辅助制备钛酸锶钡纳米粉体及其介电性能 被引量:2
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作者 唐滋励 夏浚淞 +3 位作者 尹航 傅光辉 艾细彤 唐海龙 《材料导报》 EI CAS CSCD 北大核心 2022年第11期33-37,共5页
采用溶胶沉淀法并结合熔盐辅助热处理,通过调节钡锶物质的量比制备了一系列纳米钛酸锶钡(Ba_(1-x)Sr_(x)TiO_(3),x=0.1、0.33、0.5、0.74、0.8)粉体。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、介电常数测试仪等测试手段,分析反应产... 采用溶胶沉淀法并结合熔盐辅助热处理,通过调节钡锶物质的量比制备了一系列纳米钛酸锶钡(Ba_(1-x)Sr_(x)TiO_(3),x=0.1、0.33、0.5、0.74、0.8)粉体。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、介电常数测试仪等测试手段,分析反应产物晶体结构,表征产物微观形貌并研究其介电性能。结果表明:钛酸锶钡纳米粉体具有钙钛矿型结构,且颗粒形貌为四方形或球形,平均粒径为70~100 nm,其中Ba_(0.9)Sr_(0.1)TiO_(3)、Ba_(0.67)Sr_(0.33)-TiO_(3)具有四方钙钛矿结构。1 kHz时Ba_(0.67)Sr_(0.33)TiO_(3)样品的介电常数高达1680,介电损耗为0.043,居里温度为27.3℃。 展开更多
关键词 钛酸锶钡 溶胶沉淀法 熔盐辅助 介电性能
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Genius Loci of Urban Public Spaces: A Case Study of Daihu Lake Landscape Planning in New Shouzhan District, Changle City, Fujian Province 被引量:2
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作者 xia junsong WENG Dalai 《Journal of Landscape Research》 2014年第1期1-4,8,共5页
Connotations of genius loci of urban public spaces were explored, geographical position and composition of Daihu landscape design in New Shouzhan District, Changle City, Fujian Province was introduced. Design concepts... Connotations of genius loci of urban public spaces were explored, geographical position and composition of Daihu landscape design in New Shouzhan District, Changle City, Fujian Province was introduced. Design concepts, layouts and patterns were summarized by combining with geographical and cultural conditions of the study area. Functional zoning of Daihu landscape design was analyzed, human-centered site planning stressed to realize functions of new urban public spaces, regression of cultural and humanistic properties of these spaces, so as to provide diverse options for the future construction of urban public spaces. 展开更多
关键词 Urban public spaces Genius loci Daihu Landscape planning
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