84 results about "Lead silicate" patented technology

A glaze layer formed on the surface an alumina-based insulator of a resistor spark plug contains SiO2 (18 to 35% by weight), B2O3 (25 to 40% by weight), ZnO (10 to 25% by weight), BaO (7 to 20% by weight), Na2O (3 to 9% by weight), and K2O (3 to 9% by weight). Since the difference between the coefficients of linear expansion of the glaze and that of the alumina-based insulating material is relatively small, the glaze layer is less susceptible to cracks and the like. Also, since the glaze has a softening point lower than that of conventional lead-silicate-glass-based glaze, the glost-firing temperature can be as low as 800° to 950° C. Therefore, even in the case where glost firing is performed concurrently with a glass sealing step, a center electrode and a terminal metal piece are less susceptible to oxidation. Further, even though the content of the alkali metal component is high, a good insulating performance is obtained so that excellent flashover resistance is attained.

A process for forming a refractive-index-patterned film for use in optical device manufacturing. The process includes forming a photosensitive lead-silicate-containing film on a substrate (e.g., a silicon, quartz or glass substrate) using, for example, a conventional and inexpensive sol-gel process. A predetermined portion of the lead-silicate-containing film is subsequently exposed to ultra-violet (UV) light through a patterned mask (e.g., a patterned amplitude mask, patterned phase mask or patterned gray scale mask). The UV exposure modifies the refractive index of the predetermined portion, thereby forming a refractive-index-patterned lead-silicate-containing film suitable for use in optical device manufacturing. The use of a photosensitive lead-silicate-containing film enables a relatively large refractive index modification upon exposure to UV light. A vertically tapered waveguide region that includes a substrate with a sloped upper surface protrusion and a refractive-index-patterned lead-silicate-containing film can be formed using the above described process. The refractive-index-patterned lead-silicate film is disposed on the substrate and sloped upper surface protrusion and is, therefore, vertically tapered (i.e., thinned) over the sloped upper surface protrusion. PATENT

The invention relates to a method for preparing a babbitt alloy from residue containing silver of copper anode slime. The method comprises the following steps:1, adding sodium carbonate, powdered carbon and borax according to the mass of the residue containing silver, and uniformly mixing; 2, melting to obtain a crude alloy containing lead; 3, preparing an electrolyte from fluosilicic acid, lead fluorosilicate, stannous oxide and potassium antimonyl tartrate, and adding with gelatin and ethyl naphthol; 4, treating the crude alloy as an anode and a stainless steel plate as a cathode, and taking the cathode plate (the stainless steel plate) and peeling cathode products each 12h; and 5, adding lead, antimony and copper or tin, antimony and copper to the cathode products, and melting to obtain the lead-based or tin-based babbitt alloy. The method which has the advantages of short flow, low cost, and strong practicality and allows the lead-based or tin-based babbitt alloy to be prepared from the residue containing silver of the copper anode slime is especially suitable for anode slime processing in electrolyzing electronic wastes with regenerated copper, and has the characteristics of simple and feasible operation, and high recovery rate of valuable metals.

The invention discloses environment-friendly cable filler and its preparation method. The filler is mainly prepared by mixing the following raw materials in proportion: polyvinyl chloride resin, phenolic resin, polypropylene, triallyl cyanurate, a silane coupling agent, titanate, zinc oxide, straw ash, graphite, calcium carbonate, an antiager, a fire retardant and lead silicate. The environment-friendly cable filler provided in the invention has the advantages of stable chemical structure, indecomposability by microorganism, good gelling performance, high swelling capacity, and can improve electric properties of cables, extend cable service life, and save resources.

The invention discloses a high-voltage transformer substation cable insulating sheath material and a preparation method thereof. The sheath material is prepared from the following raw materials in parts by weight: 60-80 parts of metallocene linear low density polyethylene, 25-35 parts of isotactic polypropylene, 10-15 parts of EVA, 8-12 parts of aluminum hydroxide, 5-10 parts of magnesium hydroxide, 4-8 parts of zinc stannate, 12-18 parts of siliceous rock powder, 4-6 parts of polyethylene wax, 2-3 parts of terephthalic acid zinc, 1-2 parts of magnesium oxide, 3-5 parts of dimethyl silicone oil, 2-3 parts of basic lead silicate, 5-10 parts of triallyl trimellitate, 1-2 parts of gamma-methacryloxy propyl trimethoxyl silane, 15-25 parts of fumed silica, 10-15 parts of active calcium carbonate, 1-2 parts of an antioxidant 168, and 3-5 parts of a composite filler. The sheath material has excellent mechanical strength and abrasion resistance, can effectively improve the wear resistant ability and the impact resistant ability of a cable sheath, moreover, has good flame retardancy, is low in smoke and is halogen-free, effectively solves contradictions among the flame retardancy, the mechanical strength and the abrasion resistance of the sheath material, prolongs the service life of the sheath, and guarantees normal working of a high-voltage transformer substation cable.

The invention discloses a 90-degree special temperature selflimiting electric tracing band, which comprises a conductive core, and a PTC material layer, a polymer insulating inner protective sleeve, an aluminum-magnesium alloy shielding layer and a polymer insulating outer protective sleeve which are covered outside the conductive core in turn, wherein the PTC material is prepared by mixing and melting the following raw material components in part by weight: high-density polyethylene 86-87, carbon black 12-14, tribasic lead sulfate heat stabilizer 0.11-0.13, lead silicate 0.04-0.06, styrenated phenol antioxygen 0.05-0.15, p-tert-butylphenyl salicylate light stabilizer 0.12-0.14 and tribromophenol fire retardant 0.05-0.15. The highest temperature of the band is maintained at 90+/-5 DEG C, and the band can be used as solar electric tracing band in places with large temperature difference.

The invention discloses an X-ray camera and a manufacturing method thereof. The X-ray camera is manufactured by coupling a fiber optic taper with a CCD (Charge Coupled Device) or CMOS (Complementary Metal-Oxide-Semiconductor) camera, wherein a needle-like CsI (Cesium Iodide) crystal, a moisture sealer and an aluminium coating or a silicon nitride film are arranged on a big end of the fiber optic taper in order; the fiber optic taper is manufactured by the steps of: sleeving a low-refractive-index cladding on a high-refractive-index core material of an ordinary fiber optic taper, on the basis, sleeving a black glass or lead silicate glass sleeve matching with the fiber optic taper in thermophysical properties, manufacturing a fiber array cylinder according to a front-end process of manufacturing a fiber optic panel, and then drawing the cylinder according to the proportion between the big end and a small end of the fiber optic taper, wherein the fiber optic taper made of the lead silicate glass sleeve requires hydrogen reduction treatment; and after the needle-like CsI crystal, the moisture sealer and the aluminium coating or silicon nitride film are manufactured in order on the big end of the fiber optic taper, the small end of the fiber optic taper is coupled with a light-sensitive surface of the camera by using optical cement. The X-ray camera manufactured in such a way has the minimum pixel reaching 5 micrometers and the resolution ratio being above 301p/mm with good MTF (Modulation Transfer Function).

A glaze layer formed on the surface an alumina-based insulator of a resistor spark plug contains SiO2 (18 to 35% by weight), B2O3 (25 to 40% by weight), ZnO (10 to 25% by weight), BaO (7 to 20% by weight), Na2O (3 to 9% by weight), and K2O (3 to 9% by weight). Since the difference between the coefficients of linear expansion of the glaze and that of the alumina-based insulating material is relatively small, the glaze layer is less susceptible to cracks and the like. Also, since the glaze has a softening point lower than that of conventional lead-silicate-glass-based glaze, the glost-firing temperature can be as low as 800 DEG to 950 DEG C. Therefore, even in the case where glost firing is performed concurrently with a glass sealing step, a center electrode and a terminal metal piece are less susceptible to oxidation. Further, even though the content of the alkali metal component is high, a good insulating performance is obtained so that excellent flashover resistance is attained.

The invention discloses a preparation method of light-peach-colored crystal bead blanks. Aiming at defects of poor coloring reproducibility, poor product stability, low production efficiency, and unsuitability for continuous tank furnace production of prior art for preparing light-peach-colored crystal bead blanks, the invention provides a light-peach-colored crystal bead blank preparation method with good coloring reproducibility, stable product quality, high production efficiency, and suitability for continuous tank furnace production. According to the light-peach-colored crystal bead blank preparation method, the light-peach-colored crystal bead blanks are prepared from raw materials of, by weight: 50-70 parts of quartz sand, 5-15 parts of soda ash, 7-16 parts of potassium carbonate, 2-9 parts of potassium nitrate, 2-5 parts of boric acid, no more than 45-65 parts of lead silicate, no more than 3 parts of antimony trioxide, no more than 8 parts of cerium oxide, no more than 5 parts of barium carbonate, no more than 10 parts of titanium pigment, no more than 3 parts of zinc oxide, and no more than 15 parts of erbium oxide.

A glass composition for semiconductor junction protection, characterized by including at least SiO2, Al2O3, ZnO, CaO, and 3-10 mol% of B2O3 and by substantially not including Pb, P, As, Sb, Li, Na, or K. It is desirable that the SiO2 content is within the range of 32-48 mol%, the Al2O3 content is within the range of 9-13 mol%, the ZnO content is within the range of 18-28 mol%, the CaO content is within the range of 15-23 mol%, and the B2O3 content is within the range of 3-10 mol%. Production of a semiconductor device having a high pressure-resistance similar to conventional "glass having lead silicate as the main component thereof" and using a glass material not containing lead is possible using this glass composition for semiconductor junction protection.

The invention discloses an environment-friendly cable filler and a preparation method thereof. The environment-friendly cable filler is prepared mainly by mixing polrvinyl chloride resin, phenolic resin, polypropylene, triallyl cyanurate, sillicane coupling agent, titanate, zinc oxide, straw ash, graphite, calcium carbonate, anti-aging agent, flame retardant and lead silicate in a certain mixture ratio. The environment-friendly cable filler has the advantages of stable chemical structure, good gelation performance and strong expanding capability, and cannot be decomposed by microorganisms; the electrical performance of a cable is improved; the service life of the cable is prolonged; and the resources are saved.

This glass composition for semiconductor junction protection is a glass composition for semiconductor junction protection for forming a glass layer that protects a pn junction. This glass composition for semiconductor junction protection contains at least ZnO, SiO2, B2O3, Al2O3 and at least two alkaline earth metal oxides selected from among BaO, CaO and MgO, respectively in predetermined amounts, and are composed of fine glass particles that are produced from a melt which is obtained by melting a glass starting material that does not substantially contain Pb, As, Sb, Li, Na and K. This glass composition for semiconductor junction protection does not contain a filler. According to the present invention, a semiconductor device with high reliability can be manufactured using a glass material that does not contain lead. In addition, a layer that is formed of this glass composition for semiconductor junction protection can be fired at a lower firing temperature in comparison to the cases where conventional "glass materials mainly composed of lead silicate" are used, thereby enabling the production of a semiconductor device that has excellent switching characteristics.

The invention discloses a preparation method for a transparent black crystal ball blank, and provides the preparation method for the transparent black crystal ball blank aiming at the defects of low coloring repeatability, product quality and production efficiency in the conventional preparation method for the transparent black crystal ball blank, and the defect that the conventional preparation method for the transparent black crystal ball blank is not suitable for continuous production operation of a tank furnace. By the method, a product is high in coloring repeatability, and stable in quality; and the method is high in production efficiency and suitable for continuous production operation of the tank furnace. According to the preparation method for the transparent black crystal ball blank, the transparent black crystal ball blank is prepared from the following raw materials in part by weight: 50 to 70 parts of quartz sand, 5 to 15 parts of sodium carbonate, 4 to 16 parts of potassium carbonate, 2 to 9 parts of potassium nitrate, 2 to 6 parts of boric acid, less than or equal to 10 parts of lead silicate, less than or equal to 3 parts of aluminum hydroxide, less than or equal to 4 parts of calcium carbonate, less than or equal to 2 parts of lithium carbonate, less than or equal to 5 parts of erbium oxide, less than or equal to 3 parts of chrome oxide green, less than or equal to 3 parts of magnesium carbonate, and less than or equal to 5 parts of nickel oxide.

The invention relates to a method for preparing a peacock blue crystal bead embryo, aiming at the defects of poor coloring reproducibility, unstable product quality, low production efficiency and unsuitability of production work of a continuous tank furnace in the conventional process for preparing the peacock blue crystal bead embryo, and providing the method for preparing the peacock blue crystal bead embryo with good coloring reproducibility, stable product quality, high production efficiency and suitability of production work of the continuous tank furnace. In the method for preparing the peacock blue crystal bead embryo, the peacock blue crystal bead embryo comprises the raw materials in proportions by weight: 50-70 parts of quartz sand, 5-15 parts of soda ash, 2-14 parts of potassium nitrate, 2-8 parts of boracic acid, not more than 10 parts of lead silicate, not more than 3 parts of aluminum hydroxide, not more than 5 parts of calcium carbonate, not more than 1.5 parts of lithium carbonate, not more than 5 parts of barium carbonate, not more than 7 parts of titanium white, not more than 3 parts of magnesium carbonate and not more than 6 parts of copper oxide.

The invention discloses a silicone rubber sealing pad having low permanent compression set value and a preparation method thereof.The silicone rubber sealing pad is prepared from low phenyl silicone rubber, acrylate rubber, isoprene rubber, 4,4'-diamino biphenyl, praseodymium naphthenate, silicon calcium magnesium crystal whiskers, a accelerant DTDM, a accelerant CZ, a accelerant CPB, carbon black N774, carbon black N330, 1,1-bis(tert butyl peroxyl)-3,3,5-trimethyl-cyclohexane, nano palygorskite, cobalt naphthenate, lead silicate white, zinc stearate, vaseline, an antiager 4010 NA, an antiager 2246 and a modifier.The prepared silicone rubber sealing pad has good compressibility and resilience and small permanent compression set, does not produce permanent change when being exposed at higher temperature, can have original mechanical properties of rubber after being put back at the room temperature and meanwhile has excellent abrasion resistance, corrosion resistance, aging resistance and heat resistance and other properties.

The invention discloses solar cell conductive paste, which comprises conductive powder, mixed glass and an organic phase, wherein the mixed glass comprises the following two types of glass components:the first type of glass is selected from at least one of tellurium-based glass which does not contain lead, zinc and silicon and takes tellurium, bismuth and lithium as essential components, and thesecond type of glass is at least one selected from lead silicate glass which takes lead, silicon and vanadium as essential components and does not contain tellurium and bismuth. The invention also provides frit and a solar cell. The solar cell prepared from the conductive paste is normal in EL detection, high in cell efficiency and excellent in bonding strength.

The invention discloses a preparation method for light blue crystal bead blanks. The preparation method for light blue crystal bead blanks aims to overcome shortcomings that existing preparation process for light blue crystal bead blanks is poor in coloring reproducibility, low in production efficiency and unsuitable for production operation of a continuous tan furnace, and the quality of products is unstable. The preparation method for light blue crystal bead blanks is fine in coloring reproducibility, high in production efficiency and applicable to production operation of a continuous furnace tank, and the quality of products is stable. In the preparation method for light blue crystal bead blanks, raw materials of the light blue crystal bead blanks include, by weight ratio, from 50 to 70 parts of quartz sand, from 3 to 15 parts of soda, from 4 to 16 parts of potassium carbonate, from 2 to 9 parts of potassium nitride, from 1 to 5 parts of boric acid, equal to or lower than 14 parts of lead silicate, equal to or lower than 3 parts of antimony trioxide, equal to or lower than 10 parts of barium carbonate, equal to or lower than 5 parts of titanium dioxide, equal to or lower than 3 parts of zinc oxide and equal to or lower than 2 parts of cobalt oxide.

An electroconductive paste composition including metallic particles, glass frit including lead oxide, silicon dioxide, and silver or a silver-containing compound, and an organic vehicle is provided. The invention also provides a solar cell produced by applying the electroconductive paste according to the invention to a silicon wafer and firing the silicon wafer. The invention further provides a solar cell module comprising electrically interconnected solar cells according to the invention. The invention also provides a method of producing a solar cell, including the steps of providing a silicon wafer having a front surface and a back surface, applying an electroconductive paste according to the invention to the silicon wafer, and firing the silicon wafer.

A glass composition for semiconductor junction protection, which contains at least SiO2, B2O3, Al2O3, ZnO and at least two alkaline earth metal oxides selected from among CaO, MgO and BaO, but does not substantially contain Pb, As, Sb, Li, Na and K. This glass composition for semiconductor junction protection has an average linear expansion coefficient within the range from 3.33 10-6 to 4.13 10-6 for the temperature range from 50 DEG C to 550 DEG C. A glass composition for semiconductor junction protection of the present invention enables the production of a semiconductor device having high withstand voltage with use of a glass material that contains no lead as in the cases where conventional ''glass materials that are mainly composed of lead silicate'' are used.

The invention discloses a preparation method for a modena crystal bead blank. The invention provides a preparation method, which has the advantages of good coloring reproducibility, stable product quality and high production efficiency and can be suitable for the production operation of a continuous tank furnace, for a modena crystal bead blank by aiming at the defects of poor coloring reproducibility, unstable product quality, low production efficiency and inadequacy for the production operation of a continuous tank furnace of the traditional technology for preparing the modena crystal bead blank. According to the preparation method for a modena crystal bead blank, the modena crystal bead blank is prepared from the following raw materials in parts by weight: 50-70 parts of quartz sand, 5-15 parts of soda ash, 4-16 parts of potassium carbonate, 2-9 parts of nitrate of potash, 2-6 parts of boric acid, 4.5-6 parts of potassium permanganate, less than or equal to 10 parts of lead silicate, less than or equal to 7 parts of aluminium hydroxide, less than or equal to 3 parts of calcium carbonate, less than or equal to 1 part of lithium carbonate and less than or equal to 3 parts of magnesium carbonate.

The invention belongs to the technical field of ceramic production, and in particular relates to an antiqued copper craft ceramic and a manufacturing process of the antiqued copper craft ceramic. The antiqued copper craft ceramic comprises a ceramic body and antiqued copper glazes arranged on the ceramic body, wherein the antiqued copper glazes comprise the raw materials of lead silicate, quartz, purple stone, graphite, copper oxide, a low-temperature frit, zirconium silicate powder, kaolin, lithium carbonate, ferric oxide, nickel oxide, ammonium metavanadate and manganese dioxide. By adopting the antiqued copper craft ceramic, a fired glaze surface can appropriately promote the brightness of the glaze surface along with the increase of combustion temperature, the colors from dark bronze to bright copper can be obtained through adjusting the glazing thickness and firing temperature according to creation needs, so that the antiqued copper craft ceramic has a unique artistic effect. In addition, the invention provides a temperature control for the antiqued copper craft ceramic, so that the batch industrial production and rapid popularization can be realized, and economic values are higher, and the competitiveness of the antiqued copper craft ceramic in the market is higher.

The invention discloses a composite heat-insulating heat-preserving material. The heat-preserving material is prepared from a solid feedstock and a thickening and water retention agent, wherein the solid feedstock is prepared from the ingredients in parts by weight: 28 parts of staple lead silicate fibers, 12 parts of staple basalt fibers, 4 parts of basalt fiber powder, 6 parts of floating beads, 13 parts of perlite powder, 9 parts of sodium oxide and 20 parts of cement 425#. The composite heat-insulating heat-preserving material disclosed by the invention is excellent in heat-insulating heat-preserving performance, is non-toxic, odorless, pollution-free and non-irritating and has class-A incombustible fireproof performance; and during construction, the composite heat-insulating heat-preserving material can be prepared into paste through being added with water and then is directly smeared to the surface of a building, so that the construction is simple and easy.

The invention discloses a conductive paste for forming a surface electrode of a solar cell. The conductive paste comprises conductive powder, mixed glass and an organic phase, wherein the mixed glasscomprises the following two types of glass components: the first type of glass is at least one selected from tellurium-based glass which does not substantially contain lead and takes tellurium bismuthlithium as an essential component; the second type of glass is at least one kind of glass selected from lead silicate-based glasses that contain lead and silicon as essential components and that do not substantially contain tellurium. The invention also provides a solar cell prepared by printing the conductive paste into a surface electrode and a manufacturing method of the solar cell. A solar cell prepared from the conductive paste is good in EL performance detection, excellent in cell ohmic contact, high in cell efficiency, high in stability and strong in adhesive force, and the bonding performance is considered while the stability and the ohmic contact are improved.