54results about How to "Improve meltability" patented technology

Disclosed are a low-dielectric-constant glass fiber having a glass composition comprising, by weight %, 50 to 60% of SiO2, 10 to 18% of Al2O3, 14% to less than 20% of B2O3, 1% to less than 6% of MgO, 2 to 5% of CaO, 0.5 to 5% of TiO2, 0 to 0.3% of Li2O, 0 to 0.3% of Na2O, 0 to 0.5% of K2O and 0 to 2% of F2, the content of MgO+CaO being 4 to 11% and the content of Li2O+Na2O+K2O being 0 to 0.6%, and a glass fiber fabric made of the low-dielectric-constant glass fiber. The glass fiber of the present invention has a low dielectric constant and a low dielectric tangent, is excellent in productivity and workability and is also excellent in water resistance, and the glass fiber is suitable for reinforcing printed wiring boards for high-density circuits.

A method is provided for obtaining β-casein from skim milk. Purification of β-casein from milk is achieved through a process of microfiltration using cross-flow polymeric microfiltration membranes. Cooling of the milk prior to microfiltration results in improved separation of β-casein from the other milk serum proteins. Further filtration and demineralization of the microfiltered permeate results in enrichment of the fraction containing soluble β-casein. An integrated scheme that allows a dairy plant to continuously separate and purify β-casein is provided. Also provided is a method for obtaining cheese with improved meltability and reduced bitterness.

A toner comprising: a toner particle containing a binder resin and a colorant; and an external additive, wherein the external additive is a composite particle having an organic substance and an organosilicon polymer coating layer on the surface of the organic substance, and when a curve for the variation (dE′/dT) in the storage elastic modulus E′ of the toner with respect to temperature T [° C.] is obtained on the basis of a curve of the temperature T—the storage elastic modulus E′ [Pa] of the toner, as determined by powder dynamic viscoelasticity measurements of the toner, the relative minimum value on the lowest temperature side between the onset temperature and 90° C. is −1.35×10⁸ or less.

An object of the present invention is to provide a means for improving or maintaining physical properties of a substance (in particular, a composition) (e.g., food). The object is achieved by a foam-containing composition that contains welan gum.

The invention discloses a repairing method for the surface of a draught fan blade and belongs to the technical field of draught fan repairing. According to the repairing method for the surface of the draught fan blade, the method comprises the steps of blade surface pre-treatment, preheating before spraying, preparation before material spraying, ultrasonic spraying and hole sealing treatment. According to a spraying material, an NiAl material is chosen and used to conduct bottoming, and the problem that the material thermal expansion coefficients of an abrasion-resisting work layer and a blade base layer are not matched can be solved, so that thermal stress caused by the fact that the expansion coefficients of the work layer and the blade base layer are not matched is reduced, and the mechanical matching and physical compatibility between the work layer and the blade base layer are improved. The work layer is a WC-12Co composite coating or an NiCr-Cr3C2 composite coating. According to the repairing method for the surface of the draught fan blade, by optimizing the repairing steps, multi-element alloy coating components and distribution, the good erosion and abrasion resistance performance is achieved, and the technical problem that the efficiency of a draught fan is affected due to draught fan blade erosion and abrasion is solved.

An object of the present invention is to provide a glass-ceramic which is suitable as a material for forming a reflecting mirror substrate. The glass-ceramic has celsian as a primary crystal phase and contains SiO2, Al2O3, BaO, and TiO2 as primary components and Li2O as a modification component, wherein the amount of Li2O falls within a range of 0.05 to 1.0 wt. %. The glass-ceramic is substantially formed of a crystal phase of celsian alone.

Devised are a glass and glass substrate, which contain an alkaline component at a low content, are low in density and thermal expansion coefficient, are high in strain point and Young's modulus, and are excellent in devitrification resistance, meltability, formability, and the like. That is, the glass of the present invention includes as a glass composition, in terms of mass %, 58 to 70% of SiO₂, 16 to 25% of Al₂O₃, 3 to 8% of B₂O₃, 0 to 5% of MgO, 3 to 13% of CaO, 0 to 6% of SrO, 0 to 6% of BaO, 0 to 5% of ZnO, 0 to 5% of ZrO₂, 0 to 5% of TiO₂, and 0 to 5% of P₂O₅.

An alkali-free glass characterized by having a glass composition being substantially free of an alkali metal oxide, As₂O₃ and Sb₂O₃ and including, in terms of mol %, 55 to 75% of SiO₂, 7 to 15% of Al₂O₃, 7 to 12% of B₂O₃, 0 to 3% of MgO, 7 to 12% of CaO, 0 to 5% of SrO, 0 to 2% of BaO, 0 to 5% of ZnO and 0.01 to 1% of SnO₂ and has a liquidus viscosity of 10^5.2 dPa·s or higher and a temperature corresponding to a viscosity of 10^2.5 dPa·s of 1,550° C. or lower.

The invention discloses a bearing seat inner hole abrasion remanufacturing spray repair method and belongs to the technical field of bearing seat repair. Through the steps of bearing seat inner hole surface pretreatment, preheating before spraying, spray material preparation, supersonic spraying and coating processing, a NiCr or NiAl material is selected for spray material priming, the problem that the material thermal expansion coefficients of an abrasion-resistant working layer and a bearing seat inner hole basic layer are not matched can be solved, thus, the thermal stress caused by mismatching of the expansion coefficients of the working layer and the bearing seat inner hole basic layer is reduced, and mechanical matching and physical compatibility of the working layer and the bearing seat inner hole basic layer are improved; and a WC-12Co composite coating or a NiCr-Cr3C2 composite coating is used as the working layer. Through repair step optimization, multicomponent alloy coating compositions and distribution, the good erosive abrasion resistance is achieved, and the problems of high mechanical repair cost of bearing seat abrasion and large shrinkage percentage of spraying coatings are solved.

The invention relates to the use of ions of weakly basic oxides as linking ions for polyacids in cements, preferably polyelectrolyte cements. Suitable ions comprise elements of the scandium series, for example, Sc³⁺, Y³⁺, La³⁺, Ce⁴⁺ and all subsequent tri- and tetra-valent lanthanides and the ions Mg²⁺, Zn²⁺, Ga²⁺, In²⁺. The application of said ions permits a regulation of the cement reaction without surface treatment of the glass powder.

The invention discloses a sink roll multicomponent alloy coating and a preparing and spraying method thereof, and belongs to the technical field of sink roll repair. The sink roll multicomponent alloy coating sequentially comprises a sink roll base layer, a transition layer and a work layer from inside to outside, the transition layer is a NiCrAlY spraying layer, NiCrAlY is sprayed to the sink roll base layer to serve as a metal bonding layer, that is the transition layer, and the problem of mismatching of material heat expansion coefficients between a wear-resisting heat-resisting work layer and the sink roll base layer can be solved; the work layer is the NiCr-Cr3C2 composite coating, the NiCr alloy has the excellent heat resistance, corrosion resistance, high-temperature oxidation resistance and other properties, Cr3C2 has the good high-temperature hardness and high-temperature oxidation resistance, the hard phase effect is achieved, the coating is not soluble in zinc liquid and is not wetted, coating peeling and even failures caused by heat impact can be greatly reduced, and the technical problems are solved.

The invention discloses a hot roll multi-element alloy coating and a preparation and spraying method thereof, belonging to the technical field of roll repair. A kind of hot roll multi-element alloy coating of the present invention, from inside to outside is hot roll base layer, transition layer and working layer successively, and transition layer is NiCr or NiCrAl spray coating, sprays NiCr or NiCrAl on hot roll base layer as metal bonding layer namely The transition layer can eliminate the problem of thermal expansion coefficient mismatch between the wear-resistant and heat-resistant working layer and the base layer of the hot roll; the working layer is NiCr‑Cr3C2 composite coating, and NiCr alloy has excellent heat resistance, corrosion resistance, high temperature oxidation resistance, etc. Performance, while Cr3C2 has good high temperature hardness and high temperature oxidation resistance, and acts as a hard phase. Moreover, NiCr-Cr3C2 has a linear expansion coefficient similar to that of hot rolling rolls, thereby greatly reducing the peeling or even failure of the coating caused by thermal shock, and solving the technical problem of the present invention.

The invention discloses a lithium iron phosphate-boric acid co-coated lithium nickel cobalt aluminate positive electrode material and a preparation method thereof. The preparation method comprises thefollowing steps: weighing a certain mass of a lithium nickel cobalt aluminate precursor, mixing lithium, sintering to obtain a lithium nickel cobalt aluminate primary sintered material, carrying outstirring and water washing on the lithium nickel cobalt aluminate primary sintered material, and carrying out vacuum drying to obtain a lithium nickel cobalt aluminate positive electrode material matrix; and mixing the matrix positive electrode material with a coating material lithium iron phosphate-boric acid, and carrying out high-temperature sintering to obtain the lithium iron phosphate-boricacid co-coated lithium nickel cobalt aluminate positive electrode material. The co-coated lithium nickel cobalt aluminate positive electrode material provided by the invention has good conductivity and a uniform coating layer, can prevent direct reaction between a positive electrode material matrix and an electrolytic solution, and effectively improves the cycle performance and safety performanceof the material. The method is simple in process, excellent in product performance, low in cost and suitable for large-scale industrial production.

A reflecting mirror includes an uncrystallized glass substrate and thin multilayer reflective coatings formed on a surface of the glass substrate by vapor deposition. The glass substrate contains 53 to 64 percent by weight of SiO₂, 10 to 23 percent by weight of Al₂O₃, ZnO and MgO each in an amount of not less than 3 percent by weight and in a total amount of 8 to 20 percent by weight, Na₂O and K₂O in a total amount of 0.2 to 2 percent by weight, 1 to 8 percent by weight of B₂O₃, 0 to 4% by weight of TiO₂, and As₂O₃ and Sb₂O₃ in a total amount of not more than 2 percent by weight. The glass substrate has an average expansion coefficient of not more than 35, and a distortion point of not less than 640 degrees C. Thus, the reflecting mirror can withstand a temperature of 615 degrees C. on its inner surface even though the substrate contains only a small amount of TiO₂.

The invention relates to precision moulding optical glass with high refractive index and low dispersion. With respect to application advantages, the optical glass can be used for producing optical parts and does not need to be polished, such as a lens for a digital camera. The optical parts produced through precision moulding can be used in the technical fields of imaging, projection, radio communication, optical communication engineering and laser.

A P₂O₅—BaO—ZnO—Nb₂O₅ type optical glass contains 25-50 wt. % P₂O₅, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % Nb₂O₅. The optical glass has a high refractive index (particularly preferably the refractive index n_d of 1.6 or more), low dispersion (an Abbe number υ_d of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.

A constitution of cover glass, the compositions consist in terms of weight % on the oxide basis, of from 64 to 69 wt. % of SiO₂; from 7 to 11.5 wt. % of Al₂O₃; from 1.5 to 2.5 wt. % of B₂O₃; from 4.5 to 7.5 wt. % of MgO; 0%<CaO≦2.5%; 0%<ZnO≦2%; 0%<ZrO₂≦0.2%; 0%<TiO₂≦1%; from 14.5 to 16.5 wt. % of Na₂O; from 1 to 4 wt. % of K₂O; and 0%<SnO₂≦0.4%. The constitution then can be melted to form cover glass. Thereafter, the cover glass is dipped in KNO₃ solution so that sodium ions, which is smaller in volume, contained in certain depth from the surface layer of the cover glass can be substituted by potassium ions, which is larger in volume. In this manner, squeezing effect is generated on the surface layer so as to form cover glass having high strength and resistance in both abrasion and scratch.

The invention relates to a totally-sealed cooling chamber. The totally-sealed cooling chamber comprises a lower chamber (1), an upper chamber (2), a locking block (5) and a reinforcing coaming (6), wherein a lower chamber cooling channel (3) is formed in the lower chamber (1), while an upper chamber cooling channel (4) is formed in the upper chamber (2); the lower chamber cooling channel (3) and the upper chamber cooling channel (4) are combined to form a cooling channel; a plurality of T-shaped holes (7) are symmetrically formed in the lower chamber (1) and the upper chamber (2), respectively; the T-shaped holes (7) are filled with an aluminum alloy by use of a die-casting die and a die-casting process so that locking blocks (5) can be formed; the lower chamber (1) and the upper chamber (2) are integrally and closely locked together by use of the locking blocks (5); the reinforcing coaming (6) is die-casted on the edges of the four sides of the lower chamber (1) and the upper chamber (2) by use of the die-casting die and the die-casting process. The totally-sealed cooling chamber has the advantages of good sealing effect, good inter-fusibility, short production period and suitability for large-batch production.