Chlorine gas sensing properties of ZnO-CaO ceramics

被引：14

作者：

Inoue, KI ^{[1
]}

Miyayama, M ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Appl Chem, Bunkyo Ku, Tokyo 113, Japan

来源：

JOURNAL OF ELECTROCERAMICS | 1998年 / 2卷 / 01期

关键词：

zinc oxide; calcium oxide; chlorine gas sensor; gas adsorption;

D O I：

10.1023/A:1009975210018

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The chlorine gas sensing properties of pure ZnO (PZ) and CaO-added ZnO (CAZ) ceramics with relative densities of 48-65% were investigated from 25-380 degrees C in Cl-2 concentration range from 0.9 ppm to 20 ppm using air or N-2 as a carrier gas. In the entire temperature range, the conductivity of PZ and CAZ ceramics decreased by introducing Cl-2 gas. 3 mol% CAZ showed a Cl-2 sensitivity (sigma(0)/sigma(Cl-2)) of 10 for 0.9 ppm Cl-2 in air at 300 degrees C, suggesting its usefulness for sensing of a low-concentration Cl-2 gas below 1 ppm. The CaO addition was found to decrease the Cl-2 sensitivity but to improve the recovery process after removing Cl-2 gas. These effects are attributed to changes in the amount and stability of adsorbed oxygen and to subsequent changes in Cl-2 adsorption behavior.

引用

页码：41 / 48

页数：8

共 14 条

[1] ELECTROMOTIVE-FORCE RESPONSES OF CL2 GAS SENSOR USING BACL2-KCL SOLID-ELECTROLYTE [J].

AONO, H ;

SUGIMOTO, E ;

MORI, Y ;

OKAJIMA, Y .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1993, 140 (11) :3199-3203

[2] CL2 GAS SENSOR USING BACL2-KCL SOLID-ELECTROLYTE PREPARED BY MELTING METHOD [J].

AONO, H ;

SUGIMOTO, E ;

MORI, Y ;

OKAJIMA, Y .

CHEMISTRY LETTERS, 1993, (06) :1039-1042

[3] ELECTRICAL CONDUCTIVITY OF PURE AND DOPED ZINC OXIDES, CATALYSTS OF THE HYDROGENATION OF ETHYLENE .1. ACTIVATION OF THE CATALYST AND ADSORPTION OF OXYGEN ON PURE ZINC OXIDE [J].

ARGHIROPOULOS, BM ;

TEICHNER, SJ .

JOURNAL OF CATALYSIS, 1964, 3 (06) :477-487

[4] REACTIVITY OF THE CLEAN AND CONTAMINATED (0001) POLAR AND THE (1010) PRISM ZNO SURFACES TO CHLORINE [J].

CHANDLER, PE ;

TAYLOR, PA ;

HOPKINS, BJ .

SURFACE SCIENCE, 1979, 82 (02) :500-510

[5] A REVIEW OF THE HALOGEN ADSORPTION PROCESS ON METAL-SURFACES [J].

DOWBEN, PA .

CRC CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES, 1987, 13 (03) :191-210

[6] SNINO-BASED CHLORINE GAS SENSOR [J].

GALDIKAS, A ;

MARTUNAS, Z ;

SETKUS, A .

SENSORS AND ACTUATORS B-CHEMICAL, 1992, 7 (1-3) :633-636

[7]

KOYAMA R, 1989, P JPN 1 INT SAMPE S, P375

[8]

MIYAYAMA M, 1987, J CERAM SOC JPN, V95, P1145

[9]

NIIZEKI Y, 1986, DENKI KAGAKU, V54, P961

[10]

NIIZEKI Y, 1986, DENKI KAGAKU, V54, P948

← 1 2 →