324 results about "Samarium oxide" patented technology

A ceramic article which is resistant to erosion by halogen-containing plasmas used in semiconductor processing. The ceramic article includes ceramic which is multi-phased, typically including two phase to three phases. The ceramic is formed from yttrium oxide at a molar concentration ranging from about 50 mole % to about 75 mole %; zirconium oxide at a molar concentration ranging from about 10 mole % to about 30 mole %; and at least one other component, selected from the group consisting of aluminum oxide, hafnium oxide, scandium oxide, neodymium oxide, niobium oxide, samarium oxide, ytterbium oxide, erbium oxide, cerium oxide, and combinations thereof, at a molar concentration ranging from about 10 mole % to about 30 mole %.

To improve the cutting properties, especially the cutting rate, of thin flat glass by means of a laser cutting beam from a Nd:YAG solid-state laser, the flat glass is provided during its manufacture with at least one additive ingredient that effectively absorbs radiation at a wavelength of 1.064 μm. Preferably the additive ingredient is preferably samarium oxide (Sm2O3). A method of cutting through a flat glass sheet whose composition contains at least one additive ingredient that absorbs a significant amount of radiation at a wavelength of 1.064 μm, which includes cutting the flat glass sheet with the focused radiation of a Nd:YAG laser, is also part of the present invention.

The invention relates to a method for preparation of low carbon alcohol by hydrogenolysis of sugar and sugar alcohol. The method adopts sugar and sugar alcohol as the raw materials, takes one or more than two of iron, cobalt, nickel, copper, zinc, tin, platinum, ruthenium, palladium, iridium and other transition metals as the catalyst active component, and employs a rare earth oxide like promethium oxide, gadolinium oxide, terbium oxide, holmium oxide, erbium oxide, thulium oxide, cerium oxide, lanthanum oxide, praseodymium oxide, neodymium oxide, scandium oxide, yttrium oxide, dysprosium oxide, europium oxide, samarium oxide, ytterbium oxide, lutecium oxide and the like as the assistant. Under a temperature of 150-320DEG C and an H2 pressure of 1-20MPa, catalytic hydrocracking is carried out in a water solution to obtain ethylene glycol, propylene glycol, glycerol and other low carbon alcohols. The method provided by the invention has the advantages that: the rare earth oxide is added as the assistant to realize hydrocracking of sugar and sugar alcohol, rare earth oxides are insoluble in water and easy to separate, and at the end of reaction, the reaction system has no need for additional acid to neutralize.

The invention relates to a catalyst for synthesizing isobutanol by utilizing synthesis gas. The catalyst comprises the following components in percentage by weight: 5.0-15.0% of copper oxide, 45.0-60.0% of zirconium oxide, 10.0-20.0% of zinc oxide, 1.0-5.0% of lanthanum oxide, 5.0-20.0% of cerium oxide, 0-5.0% of nickel oxide, 0-5.0% of samarium oxide, 0-5.0% of thorium oxide, 0-5.0% of vanadium pentoxide and 1.2-5.2% of potassium oxide. The catalyst has the advantages of high isobutanol selectivity and warm operation process condition.

The invention discloses an X9R ceramic capacitor dielectric material and a preparation method thereof. The preparation method comprises the following steps: niobium pentoxide, barium carbonate, ferric oxide and samarium oxide are subjected to ball milling firstly, raw materials are refined, burdening is performed at stoichiometric ratio according to the nominal chemical formula Ba3.5Sm1.5Fe0.75Nb9.25O30, procedures including presintering, second ball milling and the like are performed, and the X9R ceramic capacitor dielectric material Ba3.5Sm1.5Fe0.75Nb9.25O30 is finally prepared through a solid-phase reaction and a decarbonation process. The ceramic capacitor dielectric material with good temperature stability can be obtained with the method, the EIA (Electronic Industries Association) X9R standard can be met; and the method is simple and suitable for batch production, the cost is moderate, and energy conservation and emission reduction are realized.

The invention relates to samarium-oxide-doped modified lead zirconate titanate ferroelectric ceramic and a preparation method thereof. The ferroelectric ceramic has a composition general formula as follows: Pb1-xSmx(ZryTi1-y)0.98Nb0.02O3, wherein x is more than 0 and not more than 0.1, and y is not smaller than 0.9 and not more than 0.97. The residual polarization strength Pr of the ferroelectric ceramic ranges from 4 mu C / cm<2> to 36 mu C / cm<2>, so that the energy storage density of the ferroelectric ceramic is regulated in a wider range, and the performance requirement of the output power design of a pulse power supply is met. According to the process, formula design, weighing, mixing, powder synthesizing and sintering are carried out according to design requirements; and the addition amount of Sm2O3 is low, and no extra process program is needed. Compared with the traditional process in which a pore-forming agent is added, the preparation method has the advantage that the use of the pore-forming agent and processes such as uniform dispersion are reduced. Accordingly, the invention is simple in process and suitable for scale production.

Belonging to the technical field of functional materials, the invention relates to a stealthy coating compatible with laser and infrared and a preparation method thereof. The stealthy coating compatible with laser and infrared is composed of filler and a resin matrix, wherein the filler is a composite filler composed of samarium oxide, lanthanum oxide, flake aluminum powder and indium tin oxide, and the resin matrix is polyurethane resin. The invention adopts the composite filler composed of samarium oxide, lanthanum oxide, flake aluminum powder and indium tin oxide to cooperate with the resin matrix and an assistant, the combined action endows the coating with low emissivity at the infrared band and low reflectivity at the laser waveband. By using polyurethane resin as the resin matrix and cooperating with specific spray coating process, the coating provided by the invention has good stealth performance, and also has good mechanical properties and environmental resistance at the same time. Also the preparation method is simple and is easy for operation.

The invention discloses a novel medium cavity filter with a cavity. The novel medium cavity filter comprises the cavity and medium resonators, wherein each medium resonator is a cylinder with a through hole and is prepared from the following components according to mass percent: 29%-32% of calcium carbonate with purity of 97.5%, 9%-11% of aluminum oxide with purity of 97.5%, 21%-25% of neodymium oxide with purity of 99.5%, and 35%-38% of titanium dioxide with purity of 99.6%; a silver layer is coated at one end of each medium resonator, and the other end of the medium resonator is welded inside the cavity; the cavity is prepared from the following components according to mass percent: 95%-96% of aluminum oxide, 2%-3% of calcium carbonate, 0.8%-1.5% of lanthanum oxide, and 0.2%-0.5% of samarium oxide; and the dielectric constant of the cavity is 9.5. The medium cavity filter disclosed by the invention is high in Q value, small in size and adjustable in temperature coefficient, and can ensure high reliability of a product structure and good consistency of thermal expansion coefficients of the cavity and the medium resonators.

A copper / rare earth oxide / carbon aontact, whose material composite ratio(mass percentage) is: carbon 0.1-2.0, ytterbium trioxide or samarium trioxide 0.1-15, alloy 0.05-2.0 and copper the other, uses method of powder metallurgy and electroplating sediment to produce and the contact produced has excellent resistance to oxidation and electric arc burnt.

The invention discloses a preparation method of 1-2-micron samarium oxide. The preparation method comprises the following steps: step 1, the concentration of oxalic acid is 0.8-1.5 mol / L, pH is regulated to 3-5 with an ammonia water solution with the mass fraction of 28%, and a dispersing agent polyethylene glycol accounting for 5%-10% by mass of samarium oxide is added; the concentration of a samarium chloride solution is 0.8-2.0 mol / L, and pH is regulated to 2 with the ammonia water solution with the mass fraction of 28%; step 2, oxalic acid and the samarium chloride solution are proportioned in the mole ratio being 1.8:1, under the condition of constant temperature of 40-60 DEG C, the samarium chloride solution after pH value regulation in the step 1 is added to the oxalic acid solution after pH value regulation in the step 1, and precipitation is performed for 3-20 min; step 3, after a reaction, filtering and washing are performed; burning is performed at 900-1,000 DEG C and heat preservation is performed for 2 h; an ultrafine samarium oxide product with the particle size of 1-2 microns, uniform particle and rod-shaped morphology is obtained.

The invention relates to a samarium doped gadolinium aluminate phosphor powder body and a preparation method thereof. The chemical constituent formula of the phosphor powder body is Gd1-x1-x2A1yOz:Smx1, Rex2, wherein the y value range is 0 to 5 / 3, the RE is the rare earth element ion and / or one or more of transition metal ions, the X1 is Sm doped gram molecular weight and is larger than 0.01 and smaller than 0.1, the X2 is RE doped gram molecular weight, and the content is 1 to 0.1 time of the content of Sm. The invention adopts the preparation process that gadolinium oxide, samarium oxide and RE iron in the stoichiometric ratio are dissolved in acetic acid at 60 to 70 DEG C, then aluminium nitrate is added and is uniformly stirred; ethylene glycol is mixed into the reacting solution according to the mole number of the ethylene glycol / the mole number of metallic ion being over than or equal to 3 and less than or equal to 1.5, and is uniformly stirred; the solution is stirred and vaporized at 60 to 70 DEG C, then is dried and ground, pre-burning is performed for 2 to 3 h at 600 to 800 DEG C in air atmosphere, and the temperature increasing speed is less than and equal to 5 DEG C / min; after the pre-burnt powder is ground, agglomeration is performed for 3 to 4 h over 1000 DEG C in air atmosphere. The processing is simple, the materials are cheap and available, and the powder has large luminescent intensity and even grain size distribution under the stimulation of the blue light and the near ultraviolet.

The invention discloses a fullerene reinforced ceramic tile. The fullerene reinforced ceramic tile with good mechanical properties is obtained by applying a glaze on the surface of a green body in a glaze spraying or sprinkling manner, wherein potassium feldspar, albite, clay, attapulgite, alumina, water, fullerene, sodium tripolyphosphate and tempered fiber serve as raw materials of the green body, feldspar, kaoline, quartz, burnt talcum, limestone, iron oxide, diboron pentoxide, alumina, kieselguhr, magnesite, zirconium silicate, titanium oxide, zinc oxide, terbium oxide, samarium oxide, lutecia and metal nano particles serve as raw materials of the glaze, and a glazed surface of the ceramic tile is attractive and elegant.

The present invention relates to one kind of cerium oxide-base soild electrolyte ceramic material and its production process. The material includes in mol% cerium oxide 75-95, samarium oxide and / or gadolinium oxide 4.9-20 and characterized specific oxide ceramic alumina and / or zirconia 0.1-5. The production process includes wet milling traditional components, adding the specific oxide ceramic andwet milling in particle ball mill for 4-8 hr to prepare CeO2 base electrolyte powder; preparing blank sheet; and sintering at 1400-1500 deg.c and 6-10 deg.c / min temperature raising rate to produce the ceramic material. The ceramic material of the present invention has high mechanical strength, low sintering temperature and simple production process suitable for industrial production.