久久视频在线播放视频99re6-久久视频在线观看免费-久久视频在线免费观看-久久视频这里只精品3国产-成人h网站-成人www

熱線:021-50550642
TECHNICAL ARTICLES

技術文章

當前位置:首頁技術文章鋁酸鍶的電性能和熱膨脹系數

鋁酸鍶的電性能和熱膨脹系數

更新時間:2016-07-12點擊次數:3497

Strontium aluminate ceramics, including Sr3Al2O6, SrAl2O4 and Sr4Al14O25, synthesized by glycine–nitrate
combustion and sintered at 1773 K in air, were characterized by thermal analysis, dilatometry and electrical
measurements in controlled atmospheres. All studied strontium aluminates are semiconductors
with electrical conductivities as low as 1064105 S/cm at 1273 K in dry air. Electrical measurements
in controlled atmospheres in combination with ion transference number determination demonstrated
that SrAl2O4 is a mixed conductor with predominant ionic conductivity and increasing n-type and p-type
electronic contributions under highly reducing and oxidizing conditions, respectively. While the behavior
of electrical conductivity of Sr3Al2O6 in dry atmospheres was qualitatively similar to that of SrAl2O4, a
significant increase of conductivity in wet atmospheres was attributed to a protonic contribution to electrical
conduction, in correlation with thermogravimetric data and the tendency of this material to form a
hydrogarnet at low temperatures. The average thermal expansion coefficients of strontium aluminates,
(8.5–11.1)106 K1 at 333–1373 K, increase with increasing strontium content in the sequence
Sr4Al14O25 < SrAl2O4 < Sr3Al2O6 and are essentially independent of oxygen partial pressure.

上一個:不同操作條件下氧化鋁燒結對致密化的影響

返回列表

下一個:熱膨脹儀的廣泛用途

  • 企業名稱:

    林賽斯(上海)科學儀器有限公司

  • 公司地址:

    上海市浦東新區陸家嘴數智天地·智慧谷T3棟120號

  • 企業郵箱:

    links@linseis.com.cn

  • 聯系電話:

    021-50550642

微信公眾號

Copyright © 2025林賽斯(上海)科學儀器有限公司 All Rights Reserved  滬ICP備18045390號-2
技術支持:化工儀器網  管理登錄  sitemap.xml  
主站蜘蛛池模板: 欧美在线观看一区 | 91在线精品亚洲一区二区 | 青青草国产免费国产是公开 | 91sao国产在线观看 | 日本一区二区三区在线网 | 在线久综合色手机在线播放 | 免费 黄 色 人成 视频 | 波多野结衣免费在线视频 | 欧美高清videos性极品 | 天天综合天天做天天综合 | 中文字幕22页 | 亚洲性综合 | jizz 欧美巨大 | 久久亚洲人成网站 | 激情久久久久久久久久久 | 久久久久亚洲日日精品 | 综合 欧美 亚洲日本 | 欧美jizzhd欧美精品巨大 | 亚洲一区二区黄色 | 伊人啪啪 | japanbabes日本护士18免费 | 成年人免费看视频 | 最近中文字幕免费国语 | 亚洲v天堂v手机在线观看 | 国产视频a区| 最近中文字幕免费版在线 | 一二三四观看视频中文在线观看 | 欧美高清一级 | 最近中文字幕完整国语视频 | 久久91精品国产91久久 | 国产精品jizz在线观看免费 | 欧美日韩亚洲国内综合网俺 | 久久女人天堂 | 男女激情视频在线观看 | www亚洲国产 | 久久久久久国产精品三级 | 一级女人18片毛片免费视频 | 一级毛片在线免费视频 | 日本在线观看www | 叼嗨视频免费 | 欧美一区二区三区播放 |