Humidity-sensitive properties and conductance mechanisms of SnO2-K2O-LiZnVO4

被引：11
作者：
Fu Gang [1 ]
Chen Huan [1 ]
Hu Sumei [2 ]
Liu Zhiyu [1 ]
机构：
[1] Guangzhou Univ, Sch Phys & Elect Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Maoming Coll, Dept Phys, Maoming 525000, Guangdong, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 137卷 / 01期
关键词：
Direct current characteristics; Humidity-sensitive properties; Conductance mechanism; Nano-materials; THIN-FILMS; ELECTRICAL-PROPERTIES; SENSING PROPERTIES; SENSORS; OXIDE; MICROSTRUCTURE; TIO2;
D O I：
10.1016/j.snb.2008.12.028
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The SnO2-K2O-LiZnVO4 materials were prepared using the coprecipitation process. We examined the effects of liquid-phase (loping of potassium (K+) oil the humidity-sensitive characteristics of the nano-materials. Direct current (DC) measurements were used to investigate the mechanisms of electrical conductance of the SnO2-K2O-LiZnVO4 materials. The results demonstrated that by appropriately doping of K+ ions, a humidity-sensitive material with low resistance and moderate sensitivity could be obtained. The analysis on DC characteristics revealed a mixed electronic-ionic mechanism of electrical conductance. It was suggested that the liquid phase potassium doping at the [K] concentration of 2.5 mol% could improve the humidity-sensing performance of the nano-materials. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：17 / 20
页数：4
相关论文
共 21 条
[1]   Study of the humidity effect in the electrical response of the KSbMoO6 ionic conductive ceramic at low temperature [J].
Alvarez, R ;
Guerrero, F ;
Garcia-Belmonte, G ;
Bisquert, J .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2002, 90 (03) :291-295
[2]   A study on the humidity sensing properties of ZnCr2O4-K2CrO4 ionic conductive ceramic sensor [J].
Bayhan, M. ;
Kavasoglu, N. .
SENSORS AND ACTUATORS B-CHEMICAL, 2006, 117 (01) :261-265
[3]   Sintering and humidity-sensitive behaviour of the ZnCr2O4-K2CrO4 ceramic system [J].
Bayhan, M ;
Hashemi, T ;
Brinkman, AW .
JOURNAL OF MATERIALS SCIENCE, 1997, 32 (24) :6619-6623
[4]   Sensing mechanism of a porous ceramic as humidity sensor [J].
Chou, KS ;
Lee, TK ;
Liu, FJ .
SENSORS AND ACTUATORS B-CHEMICAL, 1999, 56 (1-2) :106-111
[5]   An EIS study of the humidity-sensitive electrical conduction of alkali-doped TiO2 films [J].
Gusmano, G ;
Bianco, A ;
Montesperelli, G ;
Traversa, E .
ELECTROCHIMICA ACTA, 1996, 41 (7-8) :1359-1368
[6]   EFFECT OF ALKALINE OXIDE ADDITION ON THE HUMIDITY SENSITIVITY OF NB2O5-DOPED TIO2 [J].
KATAYAMA, K ;
HASEGAWA, H ;
NODA, T ;
AKIBA, T ;
YANAGIDA, H .
SENSORS AND ACTUATORS B-CHEMICAL, 1990, 2 (02) :143-149
[7]   Comparative study of ZnCr2O4-K2CrO4 ceramic humidity sensor using computer controlled humidity measurement set-up [J].
Kavasoglu, N ;
Kavasoglu, AS ;
Bayhan, M .
SENSORS AND ACTUATORS A-PHYSICAL, 2006, 126 (02) :355-361
[8]   EFFECTS OF ALKALINE OXIDE ADDITIVES ON THE MICROSTRUCTURE AND HUMIDITY SENSITIVITY OF MGCR2O4-TIO2 [J].
KIM, TY ;
LEE, DH ;
SHIM, YC ;
BU, JU ;
KIM, ST .
SENSORS AND ACTUATORS B-CHEMICAL, 1992, 9 (03) :221-225
[9]   Gold promoted Li-Fe2O3 thin films for humidity sensors [J].
Neri, G ;
Bonavita, A ;
Milone, C ;
Pistone, A ;
Galvagno, S .
SENSORS AND ACTUATORS B-CHEMICAL, 2003, 92 (03) :326-330
[10]   Humidity sensing properties of Li-iron oxide based thin films [J].
Neri, G ;
Bonavita, A ;
Galvagno, S ;
Pace, C ;
Patanè, S ;
Arena, A .
SENSORS AND ACTUATORS B-CHEMICAL, 2001, 73 (2-3) :89-94
123