La_(0.5)Sr_(0.5)CoO_(3)结构、气敏和导电性的研究

SnO_2,ZnO和Fe_2O_3等气敏元件目前还存在性能不一致、不稳定等缺点.为要寻找更稳定、选择性更好的敏感元件材料,我们用陶瓷工艺合成了钙钛矿型La_(0.5)Sr_(0.5)CoO_3复合氧化物.用x-射线衍射法测量了La_(0.5)Sr_(0.5)CoO_3的样品,其结构属于立方晶系,

常温CaO烟敏元件的研究

本文研究了以 SnO_2为基质材料,加入微量 CaO 的常温气敏元件(简称常温 CaO 元件)。该元件对10%～30%的烟有很好的选择性,并且灵敏,对丁烷、煤气、液化石油气、乙醇、氢气等不灵敏.本文讨论了 Sb_2O_3对常温 CaO 元件性能的影响。

常温C_eO_2气敏元件的气敏性

研制成功了一种新型以 SnO_2为基质材料的常温 CeO_2气敏元件(简称 CeO_2元件).CeO_2元件无需要加热器也无需贵金属,该元件结构和制备工艺简单。CeO_2元件对烟和某些可燃性气体灵敏度高、稳定、响应快、恢复快。本文对已获结果进行了简单地讨论。

钇、锶、钴复合氧化物气敏性质的研究

本文制备了钇、锶、钴复合氧化物,测量了 X 线分析,电子扫描显微镜分析以及它们的孔隙度、结晶粒度的大小。作成了气敏元件,测量了气敏元件的特性曲线,并讨论了它们的作用机理。一前言钙钛矿型 ABO_3型气体敏感材料,是继 SnO_2、ZnO 等敏感材料之后深入研究的一种

Tubular micro- and nanostructures of TCO materials grown by a vapor-solid method

Microtubes and rods with nanopipes of transparent conductive oxides (TCO), such as SnO_2, TiO_2, ZnO and In_2O_3, have been fabricated following a vapor-solid method which avoids the use of catalyst or templates. The morphology of the as-grown tubular structures varies as a function of the precursor powder and the parameters employed during the thermal treatments carried out under a controlled argon flow. These materials have been also doped with different elements of technological interest (Cr, Er, Li, Zn, Sn). Energy Dispersive X-ray Spectroscopy (EDS) measurements show that the concentration of the dopants achieved by the vapor-solid method ranges from 0.5 to _3 at.%. Luminescence of the tubes has been analyzed, with special attention paid to the influence of the dopants on their optical properties. In this work, we summarize and discuss some of the processes involved not only in the anisotropic growth of these hollow micro and nanostructures, but also in their doping.