250 results about "Alkaline earth oxides" patented technology

The invention provides a low-dielectric glass fiber composition, a low-dielectric glass fiber and a preparation method thereof, and the low-dielectric glass fiber composition comprises the following components in molar percentage: 54 to 60 percent of SiO2, 21 to 32 percent of B2O3, 1.0 to 9.5 percent of Al2O3, 3 to 16 percent of alkaline earth metal oxide, 0.01 to 4.0 percent of ZrO2, 0.1 to 4.0 percent of TiO2, 0.01 to 2.0 percent of LiO2 and 0.5 to 5.0 percent of F2. Wherein the alkaline earth metal oxide comprises CaO and MgO, and according to the molar percentage, the CaO accounts for 0.01%-4.0%, and the MgO accounts for 0.5%-8.0%. According to the glass fiber, SiO2 and B2O3 are taken as main components of the glass, SiO2 can be taken as a network former of a glass structure, on one hand, part of B2O3 can form a [BO4] tetrahedral structure to enter a glass silica network structure so as to play a role in reinforcing a net, and on the other hand, B2O3 can effectively inhibit ion polarization so as to reduce the dielectric constant and dielectric loss of the glass fiber; according to the present invention, the specific type of the alkaline earth metal oxide is added, and the certain content of the Al2O3, the ZrO2, the TiO2, the LiO2 and the F2 is supplemented so as to further reduce the dielectric constant and the dielectric loss of the glass fiber, and the cooperative control of the components is beneficial to the improvement of the glass processing property and the guarantee of the glass fiber drawing stability.

A glass material with low refractive index and radiation resistance, method for preparing the same, and applications thereof. The glass material consists of the following components by mole percent: 60-80% SiO2, 2-10% B2O3, 0.1-1% CeO2, 5-10% Na2O, 2-10% K2O, 1-8% Al2O3, 0-2% CaF2, 0-1% As2O3, and 1-5% alkaline earth metal oxides, wherein the alkaline earth metal oxides are selected from at least one of BaO, SrO, CaO, and MgO. The glass material has a refractive index of ≤1.47, a glass transition temperature of ≤550° C., a yield point temperature of 645° C., a softening point temperature of ≤748° C., and a coefficient of thermal expansion of (82-87)×10−7 / ° C. After exposure to a 4700 Gy dose of X-ray radiation, the transmittance decreases by ≤2%. The glass material can be used as cladding glass material for the preparation of optical glass fibers and fiber panels, capable of meeting the requirements for radiation environment applications.

The invention discloses a copper-silicon catalyst as well as a preparation method and application thereof, and the copper-silicon catalyst comprises the following components in percentage by weight: 43-79wt% of silicon dioxide; the content of copper oxide is 15-35 wt%; the content of the auxiliary agent A is 3-10 wt%; the auxiliary agent B accounts for 3-12 wt%; the auxiliary agent A comprises one or more of alkali metal or alkaline earth metal oxides; and the auxiliary agent B comprises one or more of VB to VIIB group metal oxides. The raw materials of the catalyst are cheap and easy to obtain, the reaction condition is mild, the catalyst is environment-friendly, and the prepared catalyst is small in copper species particle size, high in dispersity, high in conversion rate and selectivity and good in stability.

The invention discloses an alkaline earth metal modified aluminum oxide loaded nickel-based catalyst as well as preparation and application thereof. The alkaline earth metal modified aluminum oxide loaded nickel-based catalyst comprises a nanofiber-shaped gamma-Al2O3 carrier, Ni and alkaline earth metal oxide, wherein the Ni and the alkaline earth metal oxide are loaded on the carrier; the alkaline earth metal is at least one of Mg and Ca. The invention provides application of the alkaline earth metal modified aluminum oxide loaded nickel-based catalyst in a methane dry reforming reaction or a methane cracking reaction. The thermal stability and the carbon deposition resistance of the catalyst can be effectively improved, and the catalyst has good catalytic performance in a methane dry reforming reaction and a methane cracking reaction.

The invention relates to aluminum borosilicate glass with low dielectric constant and low dielectric loss and a preparation method and application thereof, and relates to the field of aluminum borosilicate glass manufacturing, the aluminum borosilicate glass comprises the following main components by molar percentage: 60%-85% of SiO2, 0-10% of Al2O3, 2%-30% of B2O3, 0-20% of alkaline earth oxide, 0-10% of alkali metal oxide, 0-10% of ZnO, 0-1% of P2O5 and 0-2% of TiO2 and / or ZrO2; during preparation, the raw materials are melted, clarified and homogenized according to the corresponding dosage, and then are annealed for 3-8 hours at the temperature of 600-650 DEG C. The obtained aluminum borosilicate glass can reduce transmission loss during high-frequency signal transmission, has dielectric constant stability which does not exceed + / -0.5 change under a 1-30 GHz signal test, and can be applied to preparation of integrated antennas, electronic packaging and micro electro mechanical system packaging.

The invention relates to microcrystalline glass, a preparation method, a microcrystalline glass product and electronic equipment, and belongs to the technical field of microcrystalline glass preparation, and the microcrystalline glass comprises the following components in percentage by mole of oxides: 30-55% of Al2O3; caO: 25%-55%; 8%-20% of alkaline earth metal oxide; 3%-15% of alkali metal oxide; 0%. 10% of B2O3; alkaline earth metal ions and alkali metal ions are added into a glass system composed of calcium and aluminum, so that the glass forming performance of the glass ceramic can be effectively improved under the condition that the high mechanical strength of the glass ceramic is kept, and the glass melting temperature and energy consumption are reduced.

The invention provides a preparation method and application of a catalyst for selective production of ethanethiol. The catalyst comprises an active component, an auxiliary agent and a molded alumina carrier, the active component comprises the following components in percentage by mass: 5-10% of VIII group transition metal oxide and 15-20% of VIB group metal oxide, and the auxiliaries comprise 0.5-4% of alkali metal, 1-3% of alkaline earth metal oxide, 0.6-2% of cerium oxide and 1-4% of phosphorus pentoxide. A bifunctional catalyst with moderate Lewis acid-base sites is constructed by compounding a multi-component aid and an active component, and the catalyst shows excellent catalytic activity that the ethylene conversion per pass is greater than or equal to 98%, the ethanethiol selectivity is about-95% and the ethanethiol yield is-90% under the reaction conditions that the hydrogen sulfide / ethylene feeding mass ratio is 3-5, the temperature is 180-210 DEG C, the pressure is 0.5-1.0 MPa and the volume space velocity is 200-300 h <-1 >. And the catalyst can stably run for 1250 hours or more.

The present invention relates to an optical glass and an optical element, in a glass composition represented by mol% on an oxide basis, the content of SiO2 is 1.00% or more and 30.00% or less, the content of B2O3 is 1.00% or more and 40.00% or less, the content of La2O3 is 5.00% or more and 40.00% or less, the content of Gd2O3 is 0.00% or more and 3.50% or less, the content of Y2O3 is 0.50% or more and 20.00% or less, the content of TiO2 is 5.00% or more and 30.00% or less, and the content of ZrO2 is 0.00% or more and 20.00% or less. The content of Nb2O5 is from 0.00% to 20.00% (inclusive), the total content of Gd2O3 and Ta2O5 (Gd2O3 + Ta2O5) is from 0.00% to 3.50% (inclusive), the total content of La2O3, Gd2O3 and Y2O3 (La2O3 + Gd2O3 + Y2O3) is 26.50% or more, the total content of TiO2, ZrO2 and Nb2O5 (TiO2 + ZrO2 + Nb2O5) is from 23.00% to 36.00% (inclusive), the total content of alkaline earth metal oxide RO and alkali metal oxide R2O (RO + R2O) is 3.50% or more, the molar ratio of the content of Gd2O3 to the content of SiO2 (Gd2O3 / SiO2) is from 0.00 to 0.23 (inclusive), and the molar ratio of the content of the molar ratio of the B2O3 content to the SiO2 content (B2O3 / SiO2) is from 0.80 to 1.56 (inclusive), the molar ratio of the SiO2 content to the La2O3 content (SiO2 / La2O3) is 0.87 or less, the molar ratio of the Y2O3 content to the B2O3 content (Y2O3 / B2O3) is from 0.15 to 0.34 (inclusive), and the molar ratio of the TiO2 content to the B2O3 content (TiO2 / B2O3) is from 0.70 to 1.10 (inclusive).

The invention provides a preparation method and application of ceramic slurry for high-temperature bonding of aluminum nitride ceramics, and relates to the technical field of high-temperature ceramic materials.The preparation method comprises the following steps that firstly, an organic carrier is prepared, a polymer binder, an organic solvent, a plasticizer and a dispersing agent are weighed according to the weight ratio and stirred at the temperature of 60-70 DEG C till complete dissolution and clarification are achieved for use; 2, an inorganic functional phase is prepared, aluminum nitride powder, yttrium oxide powder and alkaline earth metal oxide powder are weighed according to the weight proportion and placed in a ball milling tank to be evenly mixed, the obtained ceramic slurry serves as a bonding layer, the tolerable temperature can reach 1000 DEG C or above and is far higher than that of metal brazing filler metal, and the ceramic slurry is suitable for severe environments such as aerospace and high-temperature sensors. The main components of the bonding layer are consistent with the base material, and the thermal expansion coefficient is highly matched, so that the thermal stress can be greatly relieved, and the failure of the device caused by thermal fatigue in the temperature cycle is avoided.

The invention provides an alkali-salt composite excited low-carbon hydraulic cementing material based on an element compatibility method as well as a preparation method and application thereof, and relates to the technical field of building materials. Silica-aluminum solid waste (mainly providing SiO2 and Al2O3), a sulfate solid waste exciting agent (mainly providing alkali metal oxide and / or alkaline earth metal oxide and SO3) and an alkaline solid waste exciting agent (mainly providing an alkalinity environment required by a hydration reaction) are used as main materials to generate a certain content of hydration product ettringite crystals and C (N)-A-S-H gel, and a compatibility method is adopted for design. The relative contents of Ca, Si, Al and S in a cementing system are adjusted while the alkaline solid waste excitant and the sulfate solid waste excitant are compounded and cooperated to excite the silicon-aluminum solid waste, so that the contents of ettringite crystals and hydrated calcium silicate gel in the whole hydration system are controlled, and the early strength and the later strength of the alkali-salt compounded and excited low-carbon hydraulic cementing material are improved.

A glass composition can include from 60 mol % to 69 mol % SiO2, from 10 mol % to 18 mol % Al2O3, from 2.3 mol % to 6.9 mol % Li2O, from 2.1 mol % to 6.7 mol % Na2O, and from 1.1 mol % to 9 mol % alkaline earth metal oxides. The glass composition can comprise a liquidus viscosity greater than or equal to 150 kP. The glass composition can include from 0.25 mol % to 1 mol % K2O, from 0.5 mol % to 4 mol % P2O5, and / or 0.5 mol % to 3.6 mol % B2O3. The glass composition can form anorthoclase or a feldspar solid solution. The glass composition can include MgO+Li2O−(CaO+SrO+Na2O+K2O) is from −0.5 to −4. The glass composition can include volume electrical resistivity is greater than or equal to 2×1015 Ohm-centimeters. The glass composition may have a fracture toughness of greater than or equal 0.75 MPa√m.

The invention relates to the technical field of preparation of propylene carbonate, and discloses a solid bifunctional catalyst as well as a preparation method and application thereof. The solid bifunctional catalyst comprises a titanium silicalite molecular sieve and alkaline earth metal oxide loaded on the titanium silicalite molecular sieve. By adopting the solid bifunctional catalyst, propylene carbonate can be directly and continuously synthesized from propylene, an oxidizing agent and CO2 through one-step reaction. The technical process is obviously simplified, the links of separation, purification, storage and transportation of epoxypropane are cancelled, and the production efficiency is improved through continuous production; the process energy consumption is obviously reduced, and the economical efficiency of the whole process is improved.

The present invention is directed towards curable film-forming coating compositions comprising metal particles; an alkaline earth metal compound comprising an alkaline earth metal oxide, an alkaline earth metal carbonate, an alkaline earth metal hydroxide, an alkaline earth metal sulfate, an alkaline earth metal monocarboxylate, an alkaline earth metal phosphate, or combinations thereof; and an organic film-forming binder. Also disclosed are methods of making curable film-forming coating compositions, methods of coating substrates, and coated substrates resulting therefrom.

The invention discloses a corrosion-resistant sealing glass material for a lithium battery and a preparation method of the corrosion-resistant sealing glass material, and the sealing glass material comprises the following components in molar percentage: 20%-29% of SiO2, 12%-25% of Al2O3, 12%-25% of B2O3, 5%-15% of alkali metal oxide and 5%-15% of alkaline earth metal oxide. Wherein the alkali metal oxide comprises 1%-5% of LiO2, 1%-5% of K2O and 1%-5% of Na2O; the alkaline earth metal oxide comprises 1%-10% of BaO, 0%-5% of CaO and 0%-5% of SrO. By accurately controlling the content of each component, the sealing glass material with good sealing performance and excellent corrosion resistance is obtained, the corrosion of electrolyte to the glass material can be remarkably inhibited, and the stability and reliability of lithium battery products are remarkably improved; and the glass material has a thermal expansion coefficient matched with related metal, so that the thermal stress in the sealing process can be reduced.

Aluminoborosilicate glass compositions, products including the same, methods of making the same, and methods of using the same are provided. Such glass compositions include an alkaline earth metal oxide. The glass composition includes low concentrations of boron oxide and strontium oxide. Such glass compositions may be substantially alkali free. The glass compositions exhibit desirable physical and chemical properties, such as high annealing point, high modulus of elasticity, low stress optical coefficient (SOC), low T (35kP) and T (200P), and desirable liquid phase viscosity. The glass composition is suitable for use as a substrate in a flat panel display device having ultra-high resolution, such as an active matrix liquid crystal display (AMLCD).

The invention belongs to the field of energy catalysis and carbon resource utilization, and particularly relates to a self-regeneration perovskite / alkaline earth metal oxide composite bifunctional material and preparation and application thereof. The invention provides a composite bifunctional component formed by Ce doped perovskite A (Ti1-x-yCexNiy) O3 and alkaline earth metal oxide, and an adsorption-catalysis bifunctional material obtained after the composite bifunctional component is subjected to thermal reduction can realize carbon dioxide capture under a high-temperature condition and is converted into synthesis gas (CO and H2) in situ. By introducing Ce, the controllable dissolution and re-embedding process of Ni in ICCU-DRM reaction is promoted, lattice self-repairing and catalytic activity self-regeneration are realized, the stability of carbon dioxide conversion reaction is effectively improved, and the problem of inactivation caused by easy sintering and carbon deposition of a traditional Ni-based catalyst in dry reforming reaction is solved.

Aluminosilicate or aluminoborosilicate glass compositions and products comprising the same are provided. Such glass compositions are substantially alkali-free and include alkaline earth metal oxides. The glass composition may include a low concentration of boron oxide. The glass compositions exhibit desirable physical and chemical properties, such as improved annealing point (e.g., above 775 DEG C), improved elastic modulus, reduced stress optical coefficient (SOC), and desirable liquidus viscosity. The glass composition is suitable for use as a substrate in a flat panel display device having ultra-high resolution, such as an active matrix liquid crystal display (AMLCD).

Disclosed herein are embodiments of a borosilicate glass composition comprising B2O3 in an amount greater than or equal to 11 mol % and less than or equal to 16 mol %; Al2O3 in an amount greater than or equal to 2 mol % and less than or equal to 5 mol %; one or more alkali metal oxides; one or more alkaline earth metal oxides; a total amount of Na2O, K2O, MgO, and CaO that is greater than or equal to 7.0 mol %°. Amounts of SiO2, B2O3, the one or more alkali metal oxides, Al2O3, and the one or more alkaline earth metal oxides, satisfy: (R2O+R′O)≥Al2O3, and 0.80<(1−[(2R2O+2R′O) / (SiO2+2Al2O3+2B2O3)])<0.93, where R2O and R′O are sums sum of the concentrations of the one or more alkali metal oxides and the one or more alkaline earth metal oxides, respectively.

The invention belongs to the technical field of solid oxide fuel cells, and provides a cell preparation process for improving the carbon deposition resistance of a Ni-based composite ceramic fuel electrode when hydrocarbon fuel is used for power generation, and the method mainly comprises the following steps: (1) preparing a cell with macropores; (2) selecting an impregnation material; (3) preparing impregnation liquid; (4) dipping process; and (5) testing the whole battery. In the step (1), a pore-forming agent used for preparing the macroporous Ni-GDC supporting body comprises polymethyl methacrylate (PMMA), polyvinyl butyral (PVB) and polystyrene (PS), or a supporting body with a vertical pore channel is prepared through a phase conversion method; materials used in the step (2) mainly comprise CeO2 doped with Ni, Fe and Ru active metals, Cr, Mn and Ti-based perovskite materials doped with Ni, Fe and Ru active metals, and alkaline earth metal oxides Pr6O11 and MgO which have an adsorption effect on water; a dipping solvent in the step (3) is selected from isopropanol and deionized water or absolute ethyl alcohol, and a proper amount of polyvinyl butyral (PVB), triton X-100, hydroxyethyl phenetole and the like are added as surfactants; the fuel for the battery test in the step (5) can be water-passing methane or methane reformed gas. According to the present invention, the prepared cell support body and the Ni skeleton in the functional layer are uniformly coated, such that the damage to the cell conductive network due to the carbon deposition in the hydrocarbon fuel can be avoided, the stability of the solid oxide fuel cell during the power generation by using the hydrocarbon fuel can be effectively improved, and the fuel applicability of the cell can be expanded.

In some embodiments the application pertains to processes comprising reacting a component comprising an alkaline earth weak acid with a component comprising an acid to form a component comprising an alkaline earth acid anion and a component comprising a weak acid derivative. At least a portion of the component comprising the alkaline earth acid anion is reacted with a component comprising an alkali sulfate to form a component comprising alkaline earth sulfate and a component comprising an alkali acid anion. At least a portion of the component comprising alkaline earth sulfate is decomposed to form a component comprising alkaline earth oxide, or alkaline earth hydroxide, or alkaline earth carbonate, or alkaline earth sulfide, or a derivative thereof, or any combination thereof, and a component comprising sulfur dioxide, or oxygen, or sulfur trioxide, or a derivative thereof, or any combination thereof.

The present invention relates to a silicate glass comprising from 35 to 45 wt% of silicon dioxide (SiO2), at most 15 wt% of molybdenum trioxide (MoO3), from 4 to 7 wt% of zirconium dioxide (ZrO2), from 1 to 3.5 wt% of phosphorus pentoxide (P2O5), and from 14 to 28 wt% of one or more alkali metal oxides and / or one or more alkaline-earth metal oxides, the weight percentages being expressed relative to the total weight of the glass. The present invention also relates to a method for improving the solubility of molybdenum in a glass melt.

The present invention discloses a colored glass-ceramics, a preparation method thereof and an application. The colored glass-ceramics, in the form of oxides and by mass percentage, includes: a base component and a coloring component. The base component includes SiO2: 67% - 73%, R2O: 10% - 19%, Al2O3: 2% - 8%, B2O3: 0 - 0.5%, SnO2: 0 - 0.2%, ZrO2: 1.5% - 5%, RO: 0 - 3%, P2O5: 1.5% - 3.5%; the coloring component includes at least one of oxides of transition metals or rare earth elements, with a mass percentage of 0.02% - 6%; wherein, R2O is an alkali metal oxide; RO is an alkaline earth metal oxide. By adding a coloring component to the glass composition, the colored glass-ceramics presents the required color. By adjusting the proportion of each component, a glass melt with a low liquidus viscosity is obtained, and its forming temperature can be between 1060 - 1250°C, and the kinematic viscosity is 21000mm 2 / s - 57500mm 2 / s, which is applicable to the fusion leakage forming of platinum pipes or platinum forming devices.

The present invention discloses an efficient and environmentally friendly process for preparing canthaxanthin, wherein beta-carotene is used as a raw material, and an oxidation reaction is carried out under the action of a catalyst to generate a crude canthaxanthin product, wherein the catalyst is an alkaline earth metal oxide modified by a transition metal. Compared with the prior art, the present invention has the following advantages: (1) the process couples the traditional oxidation reaction and the isomerization reaction, and can obtain canthaxanthin crystals in one step, the total yield of oxidation isomerization series is greater than 85%, the total purity of the obtained crystals is greater than 97%, and the total trans content is higher than 92%; (2) compared with the traditional synthesis process, the production capacity of the canthaxanthin obtained by the method is greatly improved; (3) the process is a solvent-free system, and does not use the inorganic salt solution required by the traditional process, and no waste liquid or wastewater is generated, which is green and environmentally friendly.

The present invention discloses a waste plastic oil hydrofining catalyst and a preparation method thereof, the catalyst comprises an active component and a carrier, the total mass of the catalyst is 100%, the active component accounts for 10 wt%-30 wt%, the carrier accounts for 70 wt%-90 wt%, the carrier comprises a Ce (at) Cu-M / Al2O3 composite oxide, and M is an alkali metal oxide or an alkaline earth metal oxide. According to the present invention, the synthesized Ce (at) Cu-CaO / Al2O3 composite oxide is adopted in the carrier material, such that the chlorine resistance of the catalyst is improved, the dispersity and the carbon deposition resistance of the active component on the catalyst surface are significantly improved, the high hydrogenation activity of the catalyst is obtained, the hydrogenation catalysis performance of the catalyst is effectively improved, and the waste plastic oil hydrofining dechlorination effect is improved.

The invention discloses a friction material for brake pads and application thereof and belongs to the technical field of friction materials. The composite material is prepared from the following components in percentage by weight: 15 to 20 percent of composite fiber of chopped carbon fiber and ceramic fiber, 1 to 3 percent of carboxylation modified multi-walled carbon nanotube, 8 to 12 percent of polyimide modified phenolic resin, 0.5 to 1 percent of silane coupling agent KH-550, 5 to 8 percent of bionic multilayer graphene capsule, 3 to 5 percent of rare earth doped molybdenum silicide composite material, 8 to 12 percent of scaly soft iron powder and 10 to 15 percent of thermoelectric regulation type ZrO-BeO composite material. The catalyst comprises the following components in percentage by weight: 2-4% of porous molecular sieve loaded nano SbO, 5-10% of composite alkaline earth metal oxide, 5-10% of a shaped phase change material and 0.1-0.5% of a high-thermal-conductivity silicon carbide coating, a micron-sized through channel network with a high-thermal-conductivity silicon carbide coating is constructed in the material, and a shaping phase change material is combined, so that a multi-stage synergistic heat management mechanism of conduction heat dissipation, phase change heat storage and capillary flow enhanced heat dissipation is formed, friction heat can be quickly guided out from the surface and uniformly dispersed, and local high temperature and thermal stress are greatly relieved.

This invention belongs to the field of pharmaceutical chemical synthesis technology, specifically relating to a method for preparing dicyandiamide by urea pyrolysis with anti-scaling properties. The method includes a reaction process using urea, alkaline earth metal oxides, and a scale inhibitor dopant as raw materials. The scale inhibitor dopant includes at least one of silicon dioxide and titanium dioxide, and its weight accounts for 0.1% to 5% of the weight of the alkaline earth metal oxides. Experiments show that introducing a scale inhibitor dopant into the reaction system can alter the surface tension of the isocyanate melt, helping to improve the surface properties and rheological state of the intermediate melt. This reduces material adhesion and aggregation on the reactor wall, lowers the risk of scaling and clogging, and may even eliminate scale buildup on the reactor wall, thereby improving the stability of continuous production.

The invention discloses a touch display screen which comprises a screen shell, a touch display device arranged on the screen shell and a driving control system arranged in the screen shell, and the driving control system is connected with the touch display device. The touch display device includes a glass substrate; the glass substrate is prepared from the following raw materials: SiO2, Al2O3, B2O3, MgO, CaO, SrO, BaO and SnO2. The silica structure of SiO2 is used as the most stable three-dimensional space structure in a glass network, so that the glass material has higher mechanical strength. Al2O3 is used for enhancing the thermal stability, chemical stability and mechanical strength of the glass. B2O3 plays a role of a fluxing agent and can reduce the melting point, dielectric constant, dielectric loss and the like of the glass. By adopting the combination of MgO, CaO, SrO and BaO alkaline earth metal oxides, the physical properties of the glass are improved, and the wear resistance and thermal shock resistance are enhanced. And a better glass substrate material is provided for preparing a large-size touch screen.

A method for stabilizing a reducing slag includes the steps of: subjecting a reducing slag which contains an alkaline earth metal oxide to a drying treatment, so as to obtain a dried reducing slag; mixing a urease-producing bacterium, a fermentation medium, and a nutrient, followed by conducting a fermentation treatment, so as to obtain a fermentation product containing urease; subjecting the fermentation product to a foam fractionation treatment, so as to obtain a foam containing urease; mixing the dried reducing slag, the foam containing urease, and urea, followed by conducting a urea hydrolysis reaction and a precipitation reaction in sequence, so as to obtain a product containing a stabilized reducing slag and a residual liquid; and subjecting the product to a solid-liquid separation treatment, so as to separate the stabilized reducing slag and the residual liquid from the product.

To provide a composition containing a novel ingredient that can bring about at least an acceptable level of sebum control in keratinous substances such as skin. [Solution] The present invention relates to a composition comprising (a) (i) at least one inorganic oxide, preferably a metal oxide, more preferably an alkaline earth metal oxide, and (ii) at least one fatty acid or a salt thereof, preferably a saturated fatty acid or a salt thereof, more preferably a metal salt of a saturated fatty acid, and (b) at least one second powder selected from particles containing silica and hydroxyapatite. The composition according to the present invention can provide at least an acceptable level of sebum control to keratinous substances such as skin.

To provide a glass substrate which has a low dielectric dissipation factor in high-frequency ranges, has high glass homogeneity, making it less apt to opacification, and offers excellent acid resistance.SOLUTION: The present invention pertains to a glass substrate containing, in mol percent on an oxide base: 0.1-13% of alkaline earth metal oxides in total; 1-40% of Al2O3 and B2O3 in total, where the molar ratio Al2O3 / (Al2O3+B2O3) is 0-0.45; and 0.1-1.0% of one or more selected from the group consisting of TiO2, Y2O3, and ZrO2 in total, where ZrO2 is 0.1% or less. The main component of the glass substrate is SiO2. The glass substrate has a dielectric loss tangent of 0.007 or less at 35 GHz.SELECTED DRAWING: None