Design of ceramic materials for chemical sensors with novel properties

Journal Article · Sun Oct 01 04:00:00 EDT 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08032.x· OSTI ID:131527

Traversa, E ^[1]

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1. Univ. di Roma Tor Vergata (Italy). Dipt. di Scienze e Tecnologie Chimiche

Recently, the search for novel functions has received increasing attention in the field of materials. Outstanding possibilities for innovative applications are given by electroceramics. One of the fields which may be improved by a different use of functional ceramics is that of chemical sensors. In fact, the materials conventionally used in this field show problems still to be solved, such as insufficient gas selectivity, inability to detect very low gas concentrations, and changing in sensing properties caused by surface contamination. One possible solution to these problems is the design of materials with novel detection mechanisms. The design of innovative properties may be achieved by integration or hybridization of materials with different properties. In this paper, examples of multiphase materials for humidity and gas sensors are reported, i.e., La{sub 2}CuO{sub 4}/ZnO p-n heterocontacts, Au/ZnO Schottky barriers, and sol-gel processed thin films of TiO{sub 2} with 10 at.% of K, based, respectively, on the interaction of p-type/n-type semiconductors, metal/ceramic, and conductor/insulator.

• Sponsoring Organization: USDOE
• OSTI ID: 131527
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 10 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
CERAMICS
CHEMICAL PROPERTIES
COMPOSITE MATERIALS
COPPER OXIDES
GAS ANALYSIS
GOLD
HUMIDITY
LANTHANUM OXIDES
POTASSIUM
SAMPLE PREPARATION
SCHOTTKY BARRIER DIODES
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
THIN FILMS
TITANIUM OXIDES
ZINC OXIDES