| 摘要 |
<p>Capacitor with high thermal stability characterised in that it comprises a cylindrical metal body (1), a cylindrical high-voltage electrode (2), coaxial with the casing and placed within the latter, and at least two low-voltage electrodes (3) secured so as to remain in contact against the inner wall of the casing, with the interposition of an insulating layer (4), the said electrodes being arranged symmetrically with respect to the geometric axis of the body, the said low-voltage electrodes (3) being held by means allowing them to expand freely, the dielectric medium lying between the high (2) and low (3) voltage electrodes being a gas or a vacuum, the coefficient of expansion ac of the body being equal to the coefficient of expansion ah of the high-voltage electrode, the coefficient of expansion ac of the material of the body being related to the coefficient of expansion ab of the material of the low-voltage electrodes (3) by the inequalities: <IMAGE></p> |
