1. A method for fitting and protecting a sensor on a substrate intended to be subjected to temperatures above 900\xb0 C., which consists in depositing, by alumina spraying, an electrically insulating sublayer on said substrate, then in placing the sensor on said electrically insulating sublayer and finally in depositing, by alumina spraying, a cover layer on the sensor and the electrically insulating sublayer, which method further includes a capillary impregnation step by means of an impregnant, so as to block the pores and microcracks on the surface of the cover layer or even through the entire thickness of the deposited alumina coatings right down to the substrate.
2. The method for fitting and protecting a sensor as claimed in claim 1, wherein the pressure conditions during the impregnation step, or the viscosity of the impregnant, are determined so that the depth of penetration of the impregnant into the cover layer is reduced to around a few microns.
3. The method for fitting and protecting a sensor as claimed in claim 1 or 2, wherein the impregnant is electrically insulating at high operating temperatures of the sensor.
4. The method for fitting and protecting a sensor as claimed in one of claims 1 to 3, wherein the impregnant is aluminum phosphate.
5. A turbomachine part provided with at least one sensor fitted by a method as claimed in any one of claims 1 to 4.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An electric double layer capacitor, comprising:
a separator;
a pair of polarizing electrodes, disposed opposite to each other with the separator interposed therebetween;
an electrolytic solution, impregnated in the pair of polarizing electrodes and the separator;
an exterior cover and an exterior case, accommodating the separator, the pair of polarizing electrodes, and the electrolytic solution; and
a gasket, disposed between the outer circumferential part of the exterior cover and the inner circumferential part of the exterior case, a storage space formed by the exterior case and the exterior cover being hermetically sealed by inwardly bending the opening tip portion of the exterior case;
wherein no folded-back part is provided at the outer circumferential part of the exterior cover, and the gasket is polyether ether ketone, wherein the thickness of the exterior cover is larger than the thickness of the exterior case.
2. An electric double layer capacitor, comprising:
a separator;
a pair of polarizing electrodes, disposed opposite to each other with the separator interposed therebetween;
an electrolytic solution, impregnated in the pair of polarizing electrodes and the separator;
an exterior cover and an exterior case, accommodating the separator, the pair of polarizing electrodes, and the electrolytic solution; and
a gasket, disposed between the outer circumferential part of the exterior cover and the inner circumferential part of the exterior case, a storage space formed by the exterior case and the exterior cover being hermetically sealed by inwardly bending the opening tip portion of the exterior case;
wherein no folded-back part is provided at the outer circumferential part of the exterior cover, and the gasket is polyether ether ketone, wherein a concave portion in which the gasket goes is formed in the opening tip portion of the exterior cover.
3. The electric double layer capacitor according to claim 2, wherein the shape of the cross section of the concave portion is any of a concave shape, a letter V shape, and a letter U shape.
4. An electric double layer capacitor, comprising:
a separator;
a pair of polarizing electrodes, disposed opposite to each other with the separator interposed therebetween;
an electrolytic solution, impregnated in the pair of polarizing electrodes and the separator;
an exterior cover and an exterior case, accommodating the separator, the pair of polarizing electrodes, and the electrolytic solution; and
a gasket, disposed between the outer circumferential part of the exterior cover and the inner circumferential part of the exterior case, a storage space formed by the exterior case and the exterior cover being hermetically sealed by inwardly bending the opening tip portion of the exterior case;
wherein no folded-back part is provided at the outer circumferential part of the exterior cover, and the gasket is polyether ether ketone, wherein the gasket has been heat treated at 260\xb0 C. or more prior to a reflow step.