Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors

This paper presents the synthesis of gadolinium aluminate (GdAlO<sub>3</sub>), 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...

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Autores principales:	Corneliu Doroftei, Liviu Leontie
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	gadolinium aluminate sol-gel self-combustion structural properties capacitive/resistive humidity sensors Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/25d9844bd8234b58acc3c91ebbdde16d
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spelling	oai:doaj.org-article:25d9844bd8234b58acc3c91ebbdde16d2021-11-25T18:16:22ZPorous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors10.3390/ma142271021996-1944https://doaj.org/article/25d9844bd8234b58acc3c91ebbdde16d2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/7102https://doaj.org/toc/1996-1944This paper presents the synthesis of gadolinium aluminate (GdAlO<sub>3</sub>), 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 <i>p</i>-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.Corneliu DorofteiLiviu LeontieMDPI AGarticlegadolinium aluminatesol-gel self-combustionstructural propertiescapacitive/resistive humidity sensorsTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 7102, p 7102 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	gadolinium aluminate sol-gel self-combustion structural properties capacitive/resistive humidity sensors Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	gadolinium aluminate sol-gel self-combustion structural properties capacitive/resistive humidity sensors Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Corneliu Doroftei Liviu Leontie Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
description	This paper presents the synthesis of gadolinium aluminate (GdAlO<sub>3</sub>), 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 <i>p</i>-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.
format	article
author	Corneliu Doroftei Liviu Leontie
author_facet	Corneliu Doroftei Liviu Leontie
author_sort	Corneliu Doroftei
title	Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
title_short	Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
title_full	Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
title_fullStr	Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
title_full_unstemmed	Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors
title_sort	porous nanostructured gadolinium aluminate for high-sensitivity humidity sensors
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/25d9844bd8234b58acc3c91ebbdde16d
work_keys_str_mv	AT corneliudoroftei porousnanostructuredgadoliniumaluminateforhighsensitivityhumiditysensors AT liviuleontie porousnanostructuredgadoliniumaluminateforhighsensitivityhumiditysensors
_version_	1718411369873670144

Porous Nanostructured Gadolinium Aluminate for High-Sensitivity Humidity Sensors

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