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4178187 |
Mixed oxide compound NdAlO.sub.3 for casting advanced superalloy materials
Mixed oxide compounds La 2 O 3 .11Al 2 O 3 , NdAlO 3 and nonstoichiometric MgAl 2 O 3 are suitable for making cores and molds for casting advanced superalloy materials such as NiTaC-13.
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4174973 |
Transparent yttria ceramics containing magnesia or magnesium aluminate
An article of manufacture comprising a substantially transparent high density polycrystalline yttria-based body consisting essentially of yttria and from 0.1 to 5 wt. % MgO or from 0.1 to 5 wt. %...
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4166831 |
Transparent yttria ceramics and method for producing same
An article of manufacture is provided comprising a substantially transparent high density polycrystalline yttria-base body consisting essentially of yttria and from about 0.01 to 5 wt. % alumina. A...
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4164528 |
Method for producing metal nitride sintered moldings
Metal nitride sintered moldings are produced by mixing metal nitride powders with an organosilicon compound or an organosilicon high molecular weight compound as a binder, molding the mixture into...
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4156661 |
Method of modifying electrical properties of rare-earth chromite material
A method of decreasing the electrical resistivity of a rare-earth chromite material by substituting bivalent metal ions for some of the chromium or rare-earth ions therein. The method includes...
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4155124 |
Burnt ceramic bone implant
This invention is directed to a burnt ceramics composition of matter for an endosseous implant to be inserted in the bone tissue of a living body. The composition of matter consists of 95-50% of Al...
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4127416 |
Method of producing a ceramic product
A method of producing a ceramic product which comprises the step of forming a powder mixture consisting essentially of a first component consisting of compounds containing the elements silicon,...
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4126583 |
High temperature thermistors (NTC)
Thermistors (NTC) containing a mixture of terbium oxide and a material selected from the group consisting of samarium and ytterbium oxide are useful in high temperature environments.
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4118240 |
Aluminum titanate composition being stable at high temperature
Aluminum titanate composition being stable at high temperature comprises 1.5 to 20 wt. % of Sn component as SnO 2 and/or 0.5 to 10 wt. % of rare earth element component as rare earth oxide.
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4088023 |
Liquid level gauge
A gauge for exhibiting the liquid level in a container of alkaline liquid, for example a boiler or radiator gauge, is disclosed. The gauge includes a glass component composed at least in part of a...
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4087573 |
Adhesive plasters
Adhesive plaster compositions are provided by treating particles of Y 2 O 3 , Eu 2 O 3 , Gd 2 O 3 or Nd 2 O 3 with dilute acid solutions. The resulting compositions have been found to...
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4087280 |
Method for enhancing the image contrast in color television picture tubes
This invention relates to a method for reducing the amount of ambient light which is reflected by the phosphor located on the inside surface of a color television picture tube face plate. More...
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4086089 |
Method for producing tri-color screens for television picture tubes
The present invention is directed to a method for producing patterned color-triad arrays in glass for use in color television picture tubes, such arrays being capable of acting as...
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4086311 |
Methods for increasing the crushability characteristics of cores for casting advanced superalloy materials
The crushability of a ceramic article suitable for use in the casting and directional solidification of advanced superalloy materials is enhanced by utilizing a two-phase mixture of material and...
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4081857 |
Low temperature sintering ceramic capacitor and method of making
Fired ceramic bodies, including ceramic capacitors, utilizing lead-free constituent materials fired at temperatures not higher than 1120° C.
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4077915 |
Non-linear resistor
A non-linear resistor comprises a sintered body of a ceramic composition which comprises 99.94 to 80.0 mole % of zinc oxide as ZnO, 0.02 to 10.0 mole % of the specific rare earth oxide selected...
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4076991 |
Sealing materials for ceramic envelopes
New sealant compositions for sealing end closures or inleads in ceramic envelopes are based on the system Dy 2 O 3 -Al 2 O 3 -SiO 2 . These compositions will withstand metal halides used as arc...
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4070529 |
Solid electrolyte
The invention relates to lamelliform oxides of high ionic conductivity which contain monovalent elements inserted between lamellae of oxides of the type (L x M 1 -x) O 2 wherein L is a trivalent...
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4069061 |
Ceramics having nonlinear voltage characteristics
Ceramics having nonlinear voltage characteristics in which (1) zinc oxide is used as a main component and (2) praseodymium, (3) one or more of magnesium or calcium, and (4) cobalt are added thereto...
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4054532 |
Ceramic dielectric material
A ceramic compound having the formula (La x A +2 1 -x) 2 (Ti x B +5 1 -x) 2 O 7 wherein A +2 is a positive divalent element selected from the group consisting of Ba, Ca, Cd, Mg, Sr and...
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4053551 |
Methods of recovering terbium oxide from a glass
A method for recovering Tb 4 O 7 from a glass containing terbium oxide is disclosed, the method including the steps of: I. fusing the glass containing terbium oxide with NaOH to provide a...
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4045375 |
Highly electron-conductive composition
Multiple oxides of the general formula (L 1 -x Mx) (Q 1 -y Ry)O 3 , in which L is an element of atomic number 57 - 71, M is an element of Ca, Sr or Ba, Q and R are mutually different elements of...
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4043381 |
Self-destructive core mold materials for metal alloys
In the casting of metal alloys to form hollow articles, a mold of a desired shape containing a core material fabricated to a desired configuration from a silicon yttrium or silicon lanthanide...
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4038217 |
Ceramics having non-linear voltage characteristics and method of producing the same
A ceramic having non-linear voltage characteristics, comprising the product obtained on mixing (a) zinc oxide, as a principal component, and (b) (1) cobalt and (2) one of neodymium, samarium or...
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4035819 |
Method of making a zinc sulphide ceramic body and a zinc sulphide ceramic body made thereby
A method of making a zinc sulphide ceramic body having a low electrical resistance characterized by sulphurizing a starting oxide material consisting essentially of zinc oxide and from 0.01 atomic...
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4033906 |
Ceramics having nonlinear voltage characteristics and method for producing same
Ceramics having nonlinear voltage characteristics comprising the product obtained on preparing a mixture of zinc oxide as a main component, and, as subcomponents, cobalt plus one of praseodymium or...
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4033790 |
Solid diffusion dopants for semiconductors and method of making the same
Disclosed is a solid diffusion source for the phosphorus doping of semiconductors, which comprises a substance composed of at least one kind of compound R 2 O 3 selected from the group consisting...
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4032351 |
Rare earth ceramic for frequency conversion of radiation
A rare earth ceramic having a microcrystal phase buried in a glassy phase for the coversion of radiation in the near-infrared band from about 0.85 to 1.06 um into visible light. It comprises a...
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4018615 |
Refractory material containing fused silica and crystalline phase silica
The high temperature dimensional stability and resistance to thermal shock of silica articles is improved by ensuring that from 45-60% by weight of the article consists of crystalline phase silica....
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4010122 |
High temperature hot conductors
Hot conductors containing a mixture of terbium oxide and erbium oxide are suitable for use at high temperatures.
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3963633 |
Gas discharge device dielectric containing selenium, tellurium and/or polonium
There is disclosed a gas discharge device containing at least two electrodes, at least one of the electrodes being insulated from the gas by a dielectric member. There is particularly disclosed a...
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3923675 |
Method for preparing lead lanthanum zirconate-titanate powders
High purity, submicron-size lead lanthanum zirconate-titanate powders are prepared by the simultaneous hydrolytic decomposition of lead isoamyloxide, lanthanum isopropoxide, and zirconium and...
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3923667 |
High temperature NiO rubbing seal material containing CuO and CaF2
Sealing member having a low coefficient of friction and good wear resistance at elevated temperatures, particularly when used as a rubbing seal against ceramic rotary regenerators in gas turbine...
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3909278 |
High density thoria-silica-metal (III) oxide fibers
Transparent refractory fibers, at least 50 percent thoria and additionally containing silica and metal(III) oxides, particularly Al 2 O 3 and B 2 O 3 or Cr 2 O 3 are made by shaping and...
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3897257 |
Light transmitting polycrystalline magnesia member and method of making
Light-transmitting polycrystalline member consists essentially of magnesium oxide with from 0.3% to 4% by weight of dysprosium oxide dispersed therein. The density of the member approximates...
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3897358 |
Polycrystalline ceramic lasers
A method of making a laser body from a high density yttria-based ceramic material is provided. The method involves forming an aqueous solution containing water soluble salts of yttrium, thorium and...
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3883357 |
Laser glass host compositions comprising TeO2, La2 O3 and ZnO
Laser glass compositions are disclosed that provide laser articles with increased efficiency, the compositions comprising TeO 2 , La 2 O 3 and ZnO in certain molar amounts, as defined by certain...
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3873657 |
METHOD FOR PRODUCING HIGHLY PURE SINTERED POLYCRYSTALLINE YTTRIUM OXIDE BODY HAVING HIGH TRANSPARENCY
When highly pure yttrium oxide is press molded into a desired shape and then the press molded body thus obtained is sintered at an elevated temperature in the presence of a beryllium compound, a...
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3862283 |
METHOD FOR SINTERING A YTTRIA STABILIZED ZIRCONIA BODY INCORPORATING THORIUM OXIDE AS A SINTERING AID
A method for sintering a stabilized zirconia body by incorporating thorium oxide as a grain growth inhibiting additive into a batch of powdered zirconia prior to sintering.
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3862046 |
Strengthened and high density batio3
The mechanical strength and densification of barium titanate ceramic bodies re enhanced by the addition of small amounts of halide salts in combination with metal oxides. Transparency of barium...
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3770487 |
REFRACTORY COMPOSITES
Production of oxidation resistant, thermal shock resistant and high strength composites, produced by hot pressing at high temperatures, e.g., about 2,100°C, a mixture preferably of a boride such...
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3764643 |
METHOD FOR SINTERING VERY PURE YTTRIA COMPACTS TO TRANSPARENCY
Finely divided Yttria having a purity of at least 99.99 percent is pressed into compacts, sintered in dry hydrogen or a partial vacuum to temperatures in the range of 2,150°-2,330°C, and refired...
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3737331 |
THORIA-YTTRIA-BASED CERAMIC MATERIALS
High density thoria-based ceramic materials are provided consisting essentially in mole percent as calculated from the batch on the oxide basis of 78-96% ThO 2 , 2-20% Y 2 O 3 and 0.5-5.0% CaO....
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3711585 |
USE OF YTTRIA-MAGNESIA MIXTURES TO PRODUCE HIGHLY TRANSPARENT SINTERED ALUMINA BODIES
By using a combination of magnesia and yttria, or their precursors, in small amounts as sintering aids for alumina, sintered bodies having very high in-line transmission properties are produced. In...
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3706583 |
THERMAL SHOCK RESISTANT HAFNIA CERAMIC MATERIAL
Ceramic hafnia artefacts having high thermal shock resistance are provided by incorporating tungsten or molybdenum particles in a yttria-, magnesia-, or calcia-stabilized hafnia matrix. The mix is...
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3666666 |
FERROELECTRIC CERAMIC MATERIALS
An electrooptic ferroelectric ceramic material of a lead lanthanum zirconate titanate solid solution having about 5 to 25 atom percent lanthanum with the ratio of zirconium to titanium varying from...
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3646473 |
CLAD GLASS LASER ROD
The cladding of a clad glass laser rod is made very thin and has an index of refraction slightly higher than the index of refraction of the laser glass core.
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3637531 |
METHOD FOR MAKING CERAMIC TITANATE ELEMENTS AND MATERIALS THEREFOR
A method for making ceramic titanate elements and materials therefor, particularly semiconducting lanthanide-doped barium titanate elements having positive temperature coefficients of resistance...
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3629723 |
ATHERMAL LASER USING A ONE-EIGHTH WAVE FARADAY ROTATOR
A laser device with a laser rod positioned within an optical resonant cavity. The composition of the rod is chosen to have a coefficient of linear expansion α L and a thermal coefficient of the...
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3619220 |
LOW TEMPERATURE FIRED, GLASS BONDED, DIELECTRIC CERAMIC BODY AND METHOD
Combining a high temperature prefired ceramic powder with a low firing temperature ceramic powder; forming a slip or paste suspension of the powder combination, drying and firing the combination...
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