8 results about "Metasilicate" patented technology

To provide a method for producing coated sand by which a mold having high strength can be obtained in spite of being derived from reclaimed sand.SOLUTION: A method for producing coated sand includes a step (1) of mixing aggregates (A) having an acid consumption of 25mL or more and 100mL or less with a metasilicate (B).SELECTED DRAWING: None

The invention discloses a polycarbonate material with high CTI (Comparative Tracking Index). The polycarbonate material comprises the following components in parts by weight: 70-90 parts of polycarbonate, 5-15 parts of nano titanium dioxide, 3-8 parts of metasilicate, 0.3-0.5 part of a coupling agent and 0.5-1 part of a lubricant. The invention further provides a preparation method and application of the high-CTI polycarbonate material. According to the high-CTI polycarbonate material and the preparation method and application thereof provided by the invention, the obtained polycarbonate material has excellent arc resistance and tracking resistance, also has good impact resistance and temperature resistance, and can be widely applied in scenes requiring strict electrical safety performance.

To provide a method for producing dry coated sand that can manufacture molds with excellent mold strength and surface strength. [Solution] A method for producing dry coated sand, comprising the step (1) of mixing water with refractory aggregate A having an inorganic binder layer formed on its surface containing an inorganic binder containing a metasilicate hydrate, A method for producing coated sand, wherein the mass ratio of the inorganic binder water (a component of the inorganic binder other than water) to the water in the coated sand (mass of water in the coated sand / mass of the inorganic binder water) is 1.00 to 1.60.

The invention discloses a preparation method of a slow-release metasilicic acid mineralization material, which comprises the following steps: adding ore powder into a dilute acid solution for hydrothermal reaction to obtain modified metasilicic acid ore powder; and mixing a cationic polymer, a metal oxide and the modified metasilicic acid mineral powder, and carrying out hydrothermal self-assembly reaction to obtain the self-assembly coated powder modified metasilicic acid mineralization material, and adding the self-assembled coated powder modified metasilicic acid mineralization material into a surface hydrophobic modifier, and carrying out surface hydrophobic modification reaction to obtain the slow-release metasilicic acid mineralization material. According to the invention, the problem that metasilicic acid is slowly dissolved from silicate ore at present is solved, the consumption of metasilicic acid in a soaking state is reduced, the service life of the material is prolonged, and meanwhile, the overhigh content of mineral elements in soaking water is avoided.

The present invention relates to a method for producing coated sand, the method comprising a step (1) of mixing an aggregate (A) having an acid consumption of 25 to 100 mL with a metasilicate (B). According to the present invention, it is possible to provide a method for producing coated sand that enables production of a mold having high strength, even when derived from recycled sand.

A coolant composition containing the following substances: a) an alcohol; b) water; c1) a triazole compound; c2) an imidazole compound; d) a phosphate ion; and e) a metasilicate.

The application discloses a kind of high-efficiency silicon nitride slurry based on light-cured forming and its ceramic low-temperature sintering forming method, comprising, beta phase silicon nitride powder, high-temperature binder, sintering aid is dispersed in ethanol solution by ball milling, ceramic mixed powder is obtained after drying and grinding;Add photo-initiator and oxygen barrier in photosensitive resin, stir uniformly to obtain premix liquid;Ceramic mixed powder and premix liquid are mixed, add dispersing agent, thixotropic agent, stir uniformly and vacuum defoaming to obtain silicon nitride ceramic slurry.The application effectively solves the technical defects of low single-layer curing thickness of traditional silicon nitride ceramic slurry light-cured forming, realizes high-precision, defect-free sample of 50 μm layer thickness printing of single layer, effectively improves the printing efficiency.High-temperature binder aluminum dihydrogen phosphate is introduced at the same time, and the problem of more and larger gaps between powders after debinding is solved by using metasilicate generated by its decomposition to bond silicon nitride particles, so as to realize the preparation of dense silicon nitride ceramics.

This invention provides a geopolymer-type hydraulic composition with excellent fluidity and hardened strength. [Solution] A hydraulic composition containing (A) fine aggregate, (B) metasilicate [hereinafter referred to as component (B)], (C) alumina silica fine powder, (D) bicarbonate [hereinafter referred to as component (D)], and (E) water, wherein the content of component (D) is 0.5 parts by mass or more and 50 parts by mass or less per 100 parts by mass of component (B).