181 |
Composite alumina-aluminum nitride circuit substrate |
US71134 |
1987-07-08 |
US4835065A |
1989-05-30 |
Hideki Sato; Nobuyuki Mizunoya |
Disclosed is a circuit substrate comprising an alumina plate and an aluminum nitride plate bonded to the alumina plate through metallized layers formed on the respective bonding surfaces of the alumina plate and the aluminum nitride plate and a buffering layer provided between the metallized layers, the buffering layer being of a metallic material(a) which undergoes plastic deformation by recrystallization at a temperature of not higher than 500.degree. C.,(b) which has a tensile strength of not higher than 35 kg.f/mm.sup.2 at a temperature of 500.degree. C., and(c) which has an elongation of not less than 10% at a temperature of 500.degree. C.The circuit substrate of this invention can provide a circuit substrate being excellent in heat dissipating characteristic and free from the generation of crack on an operation. |
182 |
Large-format ceramic tile with holding elements provided on the side
facing away from its visible side |
US56644 |
1987-06-01 |
US4821478A |
1989-04-18 |
Gottfried Cremer; Martin Bard |
The present invention is an improvement for large-format ceramic tiles, each of which has holding elements provided on their non-visible sides. The improvement includes attaching the holding elements to joining points determined according to static requirements by means of a ceramic glaze, whose thermal expansion coefficient is at least approximately equal to that of the ceramic tile. |
183 |
Carbonaceous composite product produced by joining carbonaceous
materials together by tetrafluoroethylene resin, and process for
producing the same |
US907977 |
1986-09-16 |
US4818640A |
1989-04-04 |
Hiroyuki Fukuda; Masatomo Shigeta; Kiyomi Ohuchi; Hisatsugu Kaji; Kuniyuki Saitoh; Masayuki Funabashi |
Disclosed herein are a carbonaceous composite product produced by joining carbonaceous materials together by melt-adhesion of a tetrafluoroethylene resin or a tetrafluoroethylene resin mixed with a highly electroconductive carbon black interposed between the carbonaceous materials, a composite electrode substrate for a fuel cell comprising the carbonaceous composite product and the process for producing the same. |
184 |
Method of preparing a monolithic structure having flow channels |
US874584 |
1978-02-02 |
US4379109A |
1983-04-05 |
Edgar A. Simpson |
A method of preparing ceramic monolithic structures having flow channels and their use as heat exchangers, filters, and catalyst supports are disclosed. In the method, a substantially uniform mixture of a composition comprising a ceramic powder, a polyolefin binder, and a plasticizer is shaped to form flat sheets and a series of ribs is formed on a first side of at least a portion of the sheets. After extraction of the plasticizer, a ceramic cement composition is applied to the ribs or to the second side of the sheets and the sheets are positioned in a layered structure such that the ceramic cement composition is in adhesive contact with a surface of the adjacent sheet. Firing the layered structure to sinter the ceramic powder and the cement composition and to decompose the polyolefin provides a monolithic structure of desirable strength and controlled porosity. |
185 |
Method of sealing ceramic to nonmetalic using indium alloy seal |
US3747173D |
1971-07-28 |
US3747173A |
1973-07-24 |
LIND R |
A hermetic seal between a crystalline ceramic member and a member of inorganic, nonmetallic material, such as glass, ceramic or semiconductor material, is described which is formed by an alloy of indium and an active metal, such as titanium, zirconium, tantalum and hafnium. In one embodiment, an envelope for a cathode ray tube is formed by sealing a glass faceplate to a ceramic funnel portion by the indium alloy seal. As a result of the short time required for such sealing, the cathode ray tube envelope may be first evacuated and then sealed during the same heating cycle so that such evacuation can be performed through the large end of the envelope at such faceplate.
|
186 |
Method of joining graphite articles |
US3717926D |
1970-01-29 |
US3717926A |
1973-02-27 |
DERGUNOVA V; DUTOV V; ANIKIN L; KRAVETSKY G |
A method of joining graphite articles in which a layer of metal is interposed between the surfaces of the articles to be joined, after which the joint area is heated to a temperature which is at least as high as the temperature at which a eutectic of the carbide of the metal and carbon is formed, or, alternatively, to a temperature somewhat higher than the said temperature whereby the resistance of the thus obtained joint to high temperature is considerably increased.
|
187 |
Alumina-rare earth oxide ceramic to metal seals for containing high temperature vapors |
US3588573D |
1967-12-29 |
US3588573A |
1971-06-28 |
CHEN CHENG-LIN; ZOLLWEG ROBERT J; ENNULAT DIETRICH F |
A FAMILY OF SEALING COMPOSITIONS FOR SEALING REFRACTORY METAL END CLOSURE MEMBERS TO TUBULAR POLYCRYSTALLINE ALUMINA ENVELOPES. THE SEALING COMPOSITIONS COMPRISE A MIXTURE OF ALUMINUM OXIDE AND ONE OR MORE RARE-EARTH OXIDES SELECTED FROM THE GROUP CONSISTING OF YTRIUM OXIDE, NEODYMIUM OXIDE, SAMARIUM OXIDE, GADOLINIUM OXIDE, EUROPIUM OXIDE, DYSPROSIUM OXIDE, PRASEODYMIUM OXIDE, TERBIUM OXIDE, HOLMIUM OXIDE, ERBIUM OXIDE, THULIUM OXIDE, YTTERBIUM OXIDE, AND LUTETIUM OXIDE IN NEARLY EUTECTIC PROPORTIONS.
|
188 |
Sio2,-cao-bao composition and method for bonding therewith |
US3489627D |
1968-02-29 |
US3489627A |
1970-01-13 |
BOTDEN THEODOOR PETER JOHANNES; KLOMP JOHANNES THEODORUS; VEN ADRIANUS JOHANNES CORNELIS |
|
189 |
Sealing compositions for bonding ceramics to metals |
US3469729D |
1966-06-30 |
US3469729A |
1969-09-30 |
GREKILA RICHARD B; HO SHIH-MING; KNOCHEL WILLIAM J; LIN FRANCIS C M |
1,173,386. Ceramic seals. WESTINGHOUSE ELECTRIC CORP. 26 April, 1967 [30 June, 1966], No. 19145/67. Heading B3V. [Also in Division C1] A method of sealing ceramic or refractory metal members to ceramic members comprises applying a sealing composition to the members, securing the sealing areas together, and heating the assembly to secure a bond, the composition of the sealing material after the sealing operation being, by weight per cent: and 0.5-10% of at least one of: SiO 2 BaO, ZrO 2 , SrO, TiO 2 , BeO, ThO 2 , Y 2 O 3 . Also included may be 0À5-3À5% by weight of Nd 2 O 3 , Ta 2 O 5 , W0 3 , Nb 2 O 5 , V 2 O 5 . A chart is included listing examples. The method may be applied to sealing Ta, Nb or ceramic, e.g. alumina, discs 12; 14 or caps on the ends of high-temperature metal vapour lamps 10 of alumina. Alumina rings 24, 26 are sealed to the discs 12, 14. One method preparing the sealing composition includes mixing 1 mole of CaCO 2 with ¢ a mole of alumina in powder form and adding the selected other constituents. Amyl acetate and cellulose acetate are included to obtain the desired viscosity and adhesion, and the composition is applied by brushing or spraying, after sand-blasting and cleaning the metal. The seals are air-dried before the assembly is located in a molybdenum clamping fixture, Fig. 2, having a tantalum R.F. susceptor 40. Alternatively, the sealing composition may be formed into compacted preforms. The fixture is placed on a rod. 48 within the R.F. coil of a vacuum furnace and subjected to a heating schedule, Fig. 3 (not shown). Another method of preparing the sealing composition to avoid a degassing period in the furnace includes melting the composition in a gas crucible furnace, pouring the molton mixture into water, ball-milling the mixture in distilled water to a fine powder, adding amyl acetate and cellulose acetate and subjecting the mixture to ultrasonic vibrations. A different firing schedule, Fig. 4 (not shown), may then be used. After evacuation of the tube 10 and insertion of the discharge sustaining filling, the tantalum tube 18 is closed and welded at 22. The expansion ratio of the tube 10, end plates and the sealing material match each other. |
190 |
Hermetically sealed body of ceramic,metal and glass and method therefor |
US3468752D |
1965-10-12 |
US3468752A |
1969-09-23 |
YAMAMOTO HIROSHI; IKEDA KOICHI; MINAGAWA KATSUJI |
|
191 |
Closure of tubes of refractory oxide material |
US3428846D |
1965-12-30 |
US3428846A |
1969-02-18 |
RIGDEN SYDNEY A R; WHISCOMBE JOHN B |
|
192 |
Metal-to-ceramic seal for high voltage electron tubes and methods of fabrication |
US47552765 |
1965-07-28 |
US3394451A |
1968-07-30 |
STUART WILLIAM R |
|
193 |
Alkali metal vapor lamp |
US52979266 |
1966-02-24 |
US3385463A |
1968-05-28 |
HORST LANGE |
|
194 |
Ceramic bonding |
US15879761 |
1961-12-12 |
US3281309A |
1966-10-25 |
ROSS JOHN F |
|
195 |
Seal construction |
US5411260 |
1960-09-06 |
US3171519A |
1965-03-02 |
NOLTE HENRY J |
|
196 |
Titanium ceramic bond using an intermediate layer of nickel |
US5755460 |
1960-09-21 |
US3137385A |
1964-06-16 |
PASCAL LEVESQUE |
|
197 |
Circuit packaging module |
US7937860 |
1960-12-29 |
US3105868A |
1963-10-01 |
FEIGIN FRANKLIN L; EGONS RASMANIS |
|
198 |
Methods of joining graphitic surfaces |
US69253857 |
1957-10-28 |
US3097931A |
1963-07-16 |
WILSON DAVIDSON HUGH; WALTER RYDE JOHN |
|
199 |
Method of soft soldering to nonmetallic refractory bodies |
US50641655 |
1955-05-06 |
US2848802A |
1958-08-26 |
LUKS DANIEL W |
|
200 |
Gaseous seal and method |
US59972856 |
1956-07-24 |
US2842699A |
1958-07-08 |
GERMESHAUSEN KENNETH J; SEYMOUR GOLDBERG |
|