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1. (WO1989000686) SEMICONDUCTOR FOR RESISTIVE GAS SENSORS WITH HIGH SPEED OF REACTION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1989/000686 International Application No.: PCT/DE1988/000418
Publication Date: 26.01.1989 International Filing Date: 07.07.1988
Chapter 2 Demand Filed: 25.01.1989
IPC:
C04B 35/462 (2006.01) ,G01N 27/12 (2006.01) ,G01N 33/00 (2006.01)
C CHEMISTRY; METALLURGY
04
CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
B
LIME; MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
35
Shaped ceramic products characterised by their composition; Ceramic compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
01
based on oxides
46
based on titanium oxides or titanates
462
based on titanates
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27
Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
02
by investigating impedance
04
by investigating resistance
12
of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid
G PHYSICS
01
MEASURING; TESTING
N
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33
Investigating or analysing materials by specific methods not covered by groups G01N1/-G01N31/131
Applicants:
KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH [DE/DE]; Weberstr. 5 D-7500 Karlsruhe, DE (AllExceptUS)
HÄFELE, Edelbert [DE/DE]; DE (UsOnly)
HÄRDTL, Karl-Heinz [DE/DE]; DE (UsOnly)
MÜLLER, Andreas [DE/DE]; DE (UsOnly)
SCHÖNAUER, Ulrich [DE/DE]; DE (UsOnly)
Inventors:
HÄFELE, Edelbert; DE
HÄRDTL, Karl-Heinz; DE
MÜLLER, Andreas; DE
SCHÖNAUER, Ulrich; DE
Common
Representative:
KERNFORSCHUNGSZENTRUM KARLSRUHE GMBH; Patente und Lizenzen Weberstr. 5 D-7500 Karlsruhe, DE
Priority Data:
P 37 23 051.411.07.1987DE
Title (EN) SEMICONDUCTOR FOR RESISTIVE GAS SENSORS WITH HIGH SPEED OF REACTION
(FR) SEMICONDUCTEUR POUR CAPTEURS RESISTIFS DE GAZ A HAUTE VITESSE DE REACTION
Abstract:
(EN) Semiconductors for resistive gas sensors or resistive semiconductor gas sensors with high speed of reaction are disclosed. These semiconductors are appropriate to measure the partial pressure of oxygen and reducing gases in any predetermined measurement range between 10-30 and about 1 bar or in the whole of this measurement range, their resistance changes being caused by a volume effect. In particular, these semiconductors have a layer less than 100 $g(m)m thick, predetermined geometric structure and clearly marked marginal zones. A specially doped semiconductor composed of perowskit having the general formula A'xA1-x-Z1B'yB1-y-Z2O3 is applied on a substrate with a paste of an organic base material by a thick film technique. By adding or removing at least one element or by using two different semiconductors the characterisitic curve is clearly traced.
(FR) Des semiconducteurs pour capteurs de gaz utiles pour mesurer la pression partielle d'oxygène et de gaz réducteurs dans une plage voulue prédéterminée de mesure comprise entre 10-30 et 1 bar environ, ou dans l'ensemble de cette plage de mesure, se fondent sur un effet de volume pour entraîner des changements de leur résistance. En particulier, ces semiconducteurs ont une couche d'une épaisseur ne dépassant pas 100 $g(m)m, et présentant des structures géométriques prédéterminées et des zones marginales fortement marquées. Afin d'obtenir de tels semiconducteurs, on utilise un matériau semiconducteur spécialement dopé formé d'un perowskit ayant la formule générale A'xA1-x-Z1B'yB1-y-Z2O3 et appliqué selon la technique des couches épaisses au moyen d'une matière pâteuse organique de base sur un substrat. En ajoutant ou en supprimant au moins un élément, ou en utilisant deux semiconducteurs différents, on obtient une claire courbe caractéristique.
Designated States: JP, US
European Patent Office (AT, BE, CH, DE, FR, GB, IT, LU, NL, SE)
Publication Language: German (DE)
Filing Language: German (DE)
Also published as:
EP0365567US4988970