Doroftei Corneliu, Leontie Liviu
Research Center in Environmental Sciences for the North-Eastern Romanian Region (CERNESIM), Science Research Department, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania.
Faculty of Physics, Alexandru Ioan Cuza University of Iasi, Bulevardul Carol I, Nr. 11, 700506 Iasi, Romania.
Materials (Basel). 2021 Nov 22;14(22):7102. doi: 10.3390/ma14227102.
This paper presents the synthesis of gadolinium aluminate (GdAlO), an oxide compound with a perovskite structure, for applications as a capacitive and/or resistive humidity sensor. Gadolinium aluminate was synthesized by the sol-gel self-combustion method. This method allowed us to obtain a highly porous structure in which open pores prevail, a structure favorable to humidity sensors. Most of the materials studied as capacitive/resistive humidity sensors have significant sensitivities only with respect to one of these types of sensors. In the case of the studied gadolinium aluminate with -type electric conductivity, the relative humidity of the air has a significant influence on both capacitive and resistive types of electric humidity sensors. The capacity increases about 10,000 times, and the resistance decreases about 8000 times as the relative humidity increases from 0 to 98%. The investigated gadolinium aluminate can be used successfully to obtain high-sensitivity capacitive and/or resistive humidity sensors.
本文介绍了用于电容式和/或电阻式湿度传感器的钙钛矿结构氧化物化合物铝酸钆（GdAlO）的合成。铝酸钆通过溶胶 - 凝胶自燃烧法合成。该方法使我们能够获得一种以开孔为主的高度多孔结构，这种结构有利于湿度传感器。大多数作为电容式/电阻式湿度传感器研究的材料仅对其中一种类型的传感器具有显著灵敏度。在所研究的具有n型电导率的铝酸钆的情况下，空气的相对湿度对电容式和电阻式两种类型的电湿度传感器都有显著影响。随着相对湿度从0%增加到98%，电容增加约10000倍，电阻降低约8000倍。所研究的铝酸钆可成功用于获得高灵敏度的电容式和/或电阻式湿度传感器。
