44results about How to "Increase surface stress" patented technology

The invention belongs to the technical field of glass reinforced treatment and proposes a dual-phase ion exchange method for glass enhancement. According to the proposed dual-phase ion exchange method for glass enhancement, in an area lower than the glass transition temperature, two stages of ion exchange processes are carried out in the same fused salt at two different temperatures; the ion exchange temperature of the first stage is higher than that of the second stage; the ion exchange time of the first stage is greater than that of the second stage; the glass with a deep enough stress layer is obtained after the first stage of ion exchange in the fused salt; the glass with the deep enough stress layer is subjected to the second-stage ion exchange inside the same fused salt, so as to obtain the glass with large enough surface stress and the deep enough stress layer. By adopting the dual-phase ion exchange method for glass enhancement, the surface stress and the stress layer depth of thin glass are greatly improved, and the dual-phase ion exchange method has a simple process.

The invention discloses a stainless steel surface treatment method. The stainless steel surface treatment method is characterized by comprising the following steps that degreasing, oil stains and impurities on the surface of a base material are removed by using a degreasing liquid; sand blasting, shot blasting treatment or sand blasting treatment is carried out on the surface of the base material,so that the surface state of the base material is uniform and consistent; dust removing, dust which is left on the surface of the base material after the sand blasting is carried out is removed; gluing, glue mucus uniformly coats the surface of the base material; and drying, a dried adhesive layer is formed on the surface of the base material. The stainless steel surface treatment method is usedfor carrying out surface treatment on stainless steel before bonding the silica gel with the stainless steel to change the characteristics of the surface of the stainless steel, good adhesion betweentwo inert materials of the silica gel and the stainless steel is realized, so that the bonding strength between the two inert materials of the silica gel and the stainless steel is greatly improved. The invention further provides the silica gel and stainless steel bonding technology and a product.

The invention relates to a chemically-reinforced cover plate glass, and a preparation method thereof. According to the preparation method, under heating conditions, a glass composition is subjected tomelting homogenizing, moulding, and annealing so as to obtain cover plate glass; the cover plate glass is dipped into a molten salt containing potassium ions for ion exchange so as to obtain the chemically-reinforced cover plate glass. The surface compressive stress of the chemically-reinforced cover plate glass ranges from 770 to 860MPa, and the compressive stress layer thickness ranges from 36to 50<mu>m; the chemically-reinforced cover plate glass is subjected to boiling in a 1mol/L NaOH solution for 10h, glass surface weight loss ratio is equal to or lower than 3.56wt%. According to the preparation method, the specific composition and the weight range of the glass composition are limited, chemical reinforcing technology is adopted, so that the obtained chemically-reinforced cover plate glass is relatively high in surface stress and stress layer thickness, the surface scratch-proofness of glass substrate obtained via chemical tempering is improved, dropping resistance and wear resistance are improved, and the alkali resistance is excellent.

The invention discloses high-alumina glass with rapid ion exchange. The high-alumina glass with rapid ion exchange comprises, in percent by molar, 55-65% of SiO2, 15-19% of Al2O3, 3-10% of Na2O, 1.5-5% of B2O3, 4-10% of P2O5, 4-7% of Li2O, 3-7% of MgO, 20-50% of SnO and the balance K2O. The intrinsic strength of the glass is improved through increase of the content of Al2O3 in the glass, and meanwhile the chemical tempering property and melting property of the glass are further improved through reasonably adjustment of the content of Li2O and P2O5 in the glass, so that surface stress and a deeper stress layer of the glass are obtained in a short time; and meanwhile a double stress layer on the glass surface can be obtained through chemical reinforcement, and the glass can be used as protective glass for mobile phones and other touch screen-containing electronic products.

The invention discloses a chemical tempering method for glass. The chemical tempering method mainly comprises the following steps: preheating aluminosilicate glass at 100-300 DEG C for 1-3 hours; immersing a first preheated part into a first molten salt, and carrying out primary ion exchange for 5-6 hours at the temperature of 410-420 DEG C; rising an obtained first tempered part for dripping saltfor 10-20 minutes; annealing the first tempered part for 2-3 hours to reduce the temperature to be lower than 100 DEG C; standing an obtained first annealed part for 10-30 min, and preheating the first annealed part for 1-3 h at the temperature of 100-300 DEG C; immersing a second preheated part into a second molten salt, and carrying out primary ion exchange for 10-20 minutes at the temperatureof 380-400 DEG C; rising a second tempered part for dripping salt for 10-20 minutes; and carrying out direct drop annealing on the second tempered part to finish tempering. According to the chemical tempering method, the thickness of a stress layer is increased by adopting a relatively high temperature in the first tempering process, and the surface stress is increased by adopting a relatively lowtemperature and an annealing direct drop mode in the second tempering, so that the strength is ensured, the time required by tempering is greatly shortened, frequent replacement of molten salt is avoided, the cost is reduced, and the efficiency is improved.

The invention discloses a preparation method of flexible ultrathin glass. The glass is prepared from SiO2, Al2O3, Na2O, K2O, MgO, P2O5, B2O3, Sb2O3, Er2O3 and SrF. The above substances are melted at ahigh temperature to form homogeneous and synergistic effects, so the excellent characteristics of the substances are effectively reflected, and the strength and the toughness of the flexible ultrathin glass is effectively enhanced.

The invention provides a shaft machining technology capable of reducing the heat treatment bend amount. The machining technology at least comprises the following steps of blanking, turning, heat treatment and grinding. The surface roughness of a semi-finished shaft prepared during turning is smaller than or equal to 6.3. By the adoption of the machining technology, shaft bend and deformation which is 0.35 MAX originally is reduced to 0.10 MAX after heat treatment, accordingly, grinding time is shortened, the working efficiency is improved, and the material utilization rate is also improved.

The invention discloses modified glass for thin-film solar cells, and a preparation method of the modified glass. The modified glass is prepared from the following components: silicon dioxide, aluminum oxide, sodium oxide, potassium carbonate, zinc oxide, borax, sodium borate, cobalt oxide, sodium chloride, graphite, manganese powder, quartz sand, nickel oxide, calcium oxide, chromium oxide, bamboo fibers, sodium hydroxide and an antioxidant. The preparation method comprises the steps of putting the silicon dioxide, the aluminum oxide, the sodium oxide, the potassium carbonate, the zinc oxide, the borax, the sodium borate, the cobalt oxide, the sodium chloride, the graphite, the manganese powder, the quartz sand, the nickel oxide, the calcium oxide and the chromium oxide into a reaction kettle, heating up to 500-700 DEG C, and then carrying out plasma treatment to obtain a first mixture; mixing the bamboo fibers with the sodium hydroxide, soaking the obtained mixture at low temperature for 24-34h, then adding the soaked mixture into the first mixture, adding the antioxidant, and evenly stirring to obtain a second mixture; sintering the second mixture at high temperature. After being modified, the glass is good in mechanical properties and high in surface stress, thus being suitable for serving as components of the thin-film solar cells.

The invention discloses a manufacturing method of temperature sensing computer keyboard touchpad glass. The method comprises the following steps: step 1, putting a touch panel glass raw material on a numerical control machine tool for CNC (Computer Numerical Control) processing; step 2, putting the glass substrate into a toughening furnace for toughening treatment; step 3, sequentially immersing the glass substrate into a chemical washing tank I and a chemical washing tank II for ultrasonic cleaning, rinsing the glass substrate subjected to ultrasonic cleaning by a countercurrent method, washing off the cleaning agent attached to the glass substrate, and then drying and inspecting the quality of the glass substrate which is rinsed to be clean; step 4, screen printing of BM ink and etching of a pattern Logo are carried out; step 5, silk-screen printing of temperature-sensitive color-changing ink; step 6, coating the surface of the glass substrate by using AF liquid medicine to form a touch panel glass finished product; and step 7, performing final quality inspection on the touch panel glass finished product, and packaging and warehousing the touch panel glass finished product. The touch panel glass has the beneficial effect that the surface color of the touch panel glass can be changed along with the change of temperature.

The invention provides a locking device which can enable the degree of freedom of setting of the magnitude of interference between a retainer of the locking device and a support hole of a housing to be increased. When the section shape of an internal circumference surface of the support hole (12c) of the housing (12) coincides with the section shape of a peripheral surface of the retainer (15) of the locking device (14) with centers being coincident, the section shape of the inner circumference surface passes through an inner side and an outer side of the section shape of the periphery surface, thus, in the process of pressing-in, the section shape of the periphery surface of the retainer (15) deforms to adapt to the section shape of the internal circumference surface of the support hole (12c), thus proper surface pressure (stress) is generated on a pressing-in surface, and the housing (12) can be prevented from cracking and the retainer (15) can be prevented from dropping. Thus, even if the housing (12) is made of aluminium material and the retainer (15) is made of iron material and difference exists in thermal expansivity, the degree of freedom of setting of the magnitude of interference between the two can be increased.

Disclosed is a method of producing a soft magnetic powder including spraying gas or water into a pure iron bath to prepare a pure iron powder, surface-treating the pure iron powder by milling to increase surface stress of the pure iron powder and make the pure iron powder spherical, and subjecting the surface-treated pure iron powder to reducing thermal treatment to grow surface crystal grains of the pure iron powder and to prepare a soft magnetic powder.

The invention discloses a preparation process of tempered glass for a gas stove panel, which comprises the following steps: 1) preparing a modified acrylic resin emulsion; 2) preparing the modified acrylic resin emulsion, polyurethane resin, lithium sulfate, nano titanium oxide, and polyalphaolefin , white carbon black, polyethylene glycol and curing agent are mixed to obtain a coating composition; 3) Take flat glass and put it into a tempering furnace for heating. ℃, take it out, spray the coating composition evenly on the surface of the flat glass, and wait until it cools down to room temperature. The preparation method of tempered glass provided by the present invention is to modify the acrylic resin, adjust the coating composition with the modified acrylic resin as the base material, and improve the adhesion of the coating composition to the surface layer of the tempered glass, so that the tempered glass surface It has high flatness and also improves the surface stress of tempered glass.

The invention provides an ultrathin high-aluminum glass chemical strengthening and film-covering strengthening process which comprises the steps: (1) cleaning: soaking a glass substrate in a cleaning agent which comprises tetrabutylammonium fluoride, oxalic acid, sodium gluconate and polyacrylic acid, ultrasonically washing the soaked glass substrate, putting the glass substrate in a drying oven after ultrasonic treatment, and drying; (2) preheating: putting the cleaned glass substrate into a muffle furnace for heating and preheating; (3) chemical strengthening: placing the preheated glass substrate in molten salt, wherein the molten salt is prepared from potassium nitrate, sodium nitrate, sodium silicate, potassium fluoride, potassium carbonate and diatomite; and (4) film-covering and strengthening: spin-coating a protective film coating on the surface of the chemically strengthened glass substrate, wherein the protective film coating comprises polydimethylsiloxane, silicon oxide, zirconium oxide and polyvinyl chloride. According to the preparation process, the surface stress, the stress layer depth, the hardness and the bending strength of the ultrathin high-aluminum glass are improved.