SE202378C1

SE202378C1 -

Info

Publication number: SE202378C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: W S Franklin Prioritet begard fran den 14 april 1961 (USA) FOreliggande uppfinning avser ett stromgenomforingsorgan som bestar av en eller flera ledare, vilka aro gastatt infasta i en keramisk kropp, som under mellanfogning av ett lodskikt är omgiven av en metallring, varvid metallen i derma ring uppvisar en storre var.- meutvidgningskoeffieient an materialet i den keramiska kroppen. Del är allmant kant, att sadana genomforingsorgan maste kunna utharda stora mekaniska och termiska pakanningar, och storre ju storre kris. den (magivande metallringen utovar ph isolermaterialet. Inventor: WS Franklin Priority Required as of April 14, 1961 (USA). in this ring exhibits a greater coefficient of thermal expansion than the material in the ceramic body. Part is the general edge, that such bushing means must be able to withstand large mechanical and thermal packages, and the greater the greater the crisis. the (magical metal ring exerts the pH insulating material.

Vid anvandning av en keramisk isolerkropp uppstar den svarigheten, att for dimensionerna hos derma keramiska kropp forhallandevis stora toleranser maste tillittas, dit denna kropp maste formas ocli brannas innan den forbindes med metalldelarna. Den omgivande metallringen maste darfor ha en cylindrisk Opp-fling, i vilken den keramiska kroppen passar vid de storsta tillatna dimensionerna, varigenom keramiska delar med mindre dimensioner som alltjamt falla Mom toleransgranserna maste fastas med ett forhallandevis tjockt lodskikt i den cylindriska ringen. When using a ceramic insulating body, the responsibility arises that for the dimensions of this ceramic body relatively large tolerances must be taken into account, where this body must be formed and burned before it is connected to the metal parts. The surrounding metal ring must therefore have a cylindrical Opp-fling, in which the ceramic body fits to the largest permissible dimensions, whereby ceramic parts with smaller dimensions that still fall Mom the tolerance limits must be fixed with a relatively thick solder layer in the cylindrical ring.

Bortsett fran det faktum, att dylika lod van_ ligtvis bestit av silver, guld eller koppar och darigenom aro dyra, blir det tryck som ringen utovar pa den keramiska kroppen mindre cm lodskiktet gores f8r tjockt, enar det fOrhallandevis mjuka lodmaterialet da kan undantryckas, om dess flytgrans overskrides. Apart from the fact that such weights usually consist of silver, gold or copper and are therefore expensive, the pressure exerted on the ceramic body becomes smaller if the solder layer is made too thick, otherwise the relatively soft solder material can be suppressed, if its migration limit is exceeded.

Pa grund harav är ett tunt lodskikt linskvart. Due to this, a thin solder layer of flax quartz.

Foreliggande uppfinning mojliggor, att all- Dupl. kl. 21 c: 10/01 tid ett mycket tunt lodskikt kan anvandas, oberoende av toleranserna hos den keramiska kroppen. Enligt uppfinningen utbildas for delta andamal oppningen i ringen och yttersidan hos den keramiska kroppen koniska, medan ringens hOjd Or stone an den keramiska kroppens. Harigenom blir det mojligt att anordna den keramiska kroppen med trang passning i ringen. Foretradesvis gores den keramiska kroppens minsta diameter lika med ringens minsta diameter, varigenom den keramiska kroppens yin ph en sida ligger i samraa plan som ringens yta. Inte i nagot fall far emellertid den keramiska kroppen skjuta utanfor ringen, enar da denna utskjutande del genom det myeket stora tryek som ringen. utovar pa den keramiska kroppen skulle kunna avklammas. Koniciteten hos oppningen och den keramiska kroppen uppgar foretradesvis till 3 till 0. The present invention enables all- Dupl. at 21 c: 10/01 time a very thin solder layer can be used, regardless of the tolerances of the ceramic body. According to the invention, for delta andamal the opening in the ring and the outer side of the ceramic body are formed conical, while the height of the ring Or stone of the ceramic body. This makes it possible to arrange the ceramic body with a tight fit in the ring. Preferably, the minimum diameter of the ceramic body is made equal to the minimum diameter of the ring, whereby the yin ph of one side of the ceramic body lies in the same plane as the surface of the ring. In no case, however, is the ceramic body allowed to shoot outside the ring, as this protruding part unites through the very large pressure like the ring. exercises on the ceramic body could be clamped. The conicity of the opening and the ceramic body preferably amounts to 3 to 0.

Uppfinningen beskrives narmare i det foljande med hanvisning till i bifogade ritning sehematiskt visade utforingsexempel. The invention is described in more detail in the following with reference to exemplary embodiments shown in the accompanying drawing.

Figurerna 1, 2, 3 och 4 visa tvarsnitt gertom olika utforingsformer av stromgenomforingsorgan enligt uppfinningen. Figures 1, 2, 3 and 4 show cross-sections through different embodiments of current bushing means according to the invention.

I figurerna betecknar 1 en tjoekvaggig me-talking av stal, nickel, jarn eller av legeringar som uppvisa en tillraeklig varmeutvidgningskoefficient och corn kunna utova tillrackligt hogt tryck. Utvidgningskoefficienten for metallen mhste i genomsnitt vara c:a 165X-7 em/em/°C, medan koefficienten for del keramiska materialet i isolerkroppen 2 i genomsnitt uppgar till 60 X -7 em/cm/°C. Delta keramiska material kan vara aluminiumoxid, sa- 2 fir, forsterit, steatit och liknande material. Vid val av materialkombination for ringen och isolerkroppen maste man tilise, att utvidgaingskoefficienterna atminstone skilja sig med en faktor 1,5. In the figures, 1 denotes a thick-rocked me-talking of steel, nickel, iron or of alloys which exhibit a sufficient coefficient of thermal expansion and corn can exert a sufficiently high pressure. The coefficient of expansion of the metal must on average be about 165X-7 cm / cm / ° C, while the coefficient of the ceramic material in the insulating body 2 averages 60 X -7 cm / cm / ° C. Delta ceramic materials can be alumina, sapphire, forsterite, steatite and similar materials. When choosing a material combination for the ring and the insulating body, it must be ensured that the coefficients of expansion differ by at least a factor of 1.5.

Efter branningen metalliseras ytterytan hos den keramiska kroppen 2 genom ett kant fOrfarande med tuna metall, t. ex. genom paangning eller genom sonderdelning av en pasta. Den metalliserade ytan tackes sedan med ett mellanskikt 3 av koppar eller nickel, vars tjocklek hogst far uppga till 10 mikron. After firing, the outer surface of the ceramic body 2 is metallized by an edge method using thin metal, e.g. by straining or by probing a paste. The metallized surface is then thanked with an intermediate layer 3 of copper or nickel, the thickness of which may not exceed 10 microns.

Den keramiska kroppen 2 infores sedan i oppningen i ringen 1, varpa en ring 5 av lodmaterialet, t. ex. silver, lagges ph kroppen 2. Genom upphettning till c:a 1000°C i en. reduceran.deeller neutral atmoslar smaltes lodet 5. Etat. ringen. 1 utvidgar sig mera an kroppen 2, haft lodet 5 flyta ut mellan ringen 1 och kroppen 2. For att forhindra, att kroppen skjuter ut p5 undersidan ur ringen, lagges delarna p5 en plan platta 6. Efter avkylningen utovar ringen 1 ett stort tryck pa kroppen 2. Pa grund av den ringa tjockleken kommer lodskiktet 5' icke att undantryckas (fig. 2). The ceramic body 2 is then inserted into the opening in the ring 1, warping a ring 5 of the solder material, e.g. silver, the pH of the body is added 2. By heating to approx. 1000 ° C in a. reduceran.deeller neutral atmoslar smaltes lodet 5. Etat. the ring. 1 extends more than the body 2, had the solder 5 flow out between the ring 1 and the body 2. To prevent the body from protruding on the underside of the ring, the parts are laid on a flat plate 6. After cooling, the ring 1 exerts a large pressure on body 2. Due to the small thickness, the solder layer 5 'will not be suppressed (Fig. 2).

Vid utforingsformen enligt fig. 3 Sr den keramiska kroppen 2 forsedd med oppningar 8, i vilka strOmtillforselledare 9 aro fasta med lod 4. Ledarna 9 best& t. ex. av jam, nickel eller molybden. Fastlodningen av ledarna 9 sker samtidigt mcd fastl8dningen ay kroppen 2 i ringen 1. Under lodningen hSlles ledarna 9 genom en form i korrekt lage 1 Oppningarna 8. In the embodiment according to Fig. 3, the ceramic body 2 is provided with openings 8, in which current supply conductors 9 are fixed with solder 4. The conductors 9 consist of e.g. of jam, nickel or molybdenum. The soldering of the conductors 9 takes place simultaneously with the soldering to the body 2 in the ring 1. During the soldering, the conductors 9 are held through a mold in the correct position 1 The openings 8.

I fig. 4 aro oppningarna 12 anordnade i en metallskiva 10, i vilken ,separata koniska, keramiska kroppar 11 aro fastlodda pa samma satt som ovan beskrivits. In Fig. 4, the openings 12 are arranged in a metal plate 10, in which, separate conical, ceramic bodies 11 are soldered in the same manner as described above.

Claims

Patent claims;

A current-carrying means consisting of a metal ring, which encloses a ceramic body with high pressure, while the stroin supply conductors are fixed in the ceramic body, and the opening in the metal ring and the outside has the ceramic body conically shaped and having the same conicity, characterized therefrom. to raise it at the ring Sr stone an thicknessea at the ceramic body.

2. Current current, according to claim 1, characterized in that the surface of the ceramic body having the smallest diameter is in the same plane as the corresponding surface of the ring. Request publications: Patentskrifter! Rein Sverige 162 919; France 609 881, 1 118 227.