274results about How to "Low softening temperature" patented technology

An implant (1) to be implanted in bone tissue, e.g. a dental implant or an implant for an orthopedic application, comprises surface regions (4) of a first type which have e.g. osseo-integrative, inflammation-inhibiting, infection-combating and/or growth-promoting properties, and surface regions (8) of a second type which consist of a material being liquefiable by mechanical oscillation. The implant is positioned in an opening of e.g. a jawbone and then mechanical oscillations, e.g. ultrasound is applied to it while it is pressed against the bone. The liquefiable material is such liquefied at least partly and is pressed into unevennesses and pores of the surrounding bone tissue where after resolidification it forms a positive-fit connection between the implant and the bone tissue. The surface regions of the two types are arranged and dimensioned such that, during implantation, the liquefied material does not flow or flows only to a clinically irrelevant degree over the surface regions of the first type such enabling the biologically integrative properties of these surface regions to start acting directly after implantation. The implant achieves with the help of the named positive fit a very good (primary) stability, i.e. it can be loaded immediately after implantation. By this, negative effects of non-loading are prevented and relative movements between implant and bone tissue are reduced to physiological measures and therefore have an osseo-integration promoting effect.

A monolithic ferrule/endcap/optical fiber structure is provided wherein an optical fiber is terminated in a ferrule and bonded by fusion to form a monolithic unit which minimizes optical loss and is typically capable of transmitting high power laser radiation, preferably on the order of 500 W and higher, without damage to the optical fiber and ferrule. Ferrule, endcap, optical fiber and fusible powder are composed of material of substantially the same physical characteristics such that, when all are fused together, the structure so formed is monolithic and the optical path is transparent.

The invention discloses lead-free glass powder, a preparation method thereof, silver paste containing the glass powder and a crystal silicon solar cell manufactured by using the silver paste. The lead-free glass powder comprises the following components in percentage by weight: 20-30 percent of SiO2, 2-15 percent of B2O3, 40-70 percent of Bi2O3, 1-10 percent of ZnO, 1-10 percent of Al2O3 and 1-5 percent of BaO. The preparation method comprises the following steps of: (1) weighing the components for preparing a mixture; (2) putting the mixture into a crucible for melting; (3) performing water quenching on molten glass; (4) drying; (5) smashing the mixture into powder by planetary ball milling; and (6) screening. The needed silver paste is prepared from the lead-free glass powder, silver powder, an additive and an organic carrier. A solar panel front face electrode and a grid line are manufactured by performing screen printing and sintering on conductive silver paste on a cell substrate, so that the needed solar cell is obtained. The lead-free glass powder has low melting temperature, low softening temperature and low linear expansion factor.

The invention discloses a method for preparing microcrystalline foam glass by using high titanium blast furnace slag and waste glass powder. The method comprises the following steps: grinding the high titanium blast furnace slag and waste glass powder, uniformly and fully mixing the high titanium blast furnace slag, the waste glass powder, a fluxing agent, a foaming agent and a foam stabilizer, pressing into a block, adding the mixture block into a heating device and preparing the microcrystalline foam glass at a low temperature according to a specific heat treatment process by using a one-step sintering method. According to the characteristic that the high titanium blast furnace slag which is rich in TiO2 can serve as a nucleation agent, the low-melting-point waste glass powder serves as a silicious raw material, a proper amount of corresponding fluxing agent and sintering process are matched, the preparation temperature is greatly reduced, and the preparation can be finished through one-step sintering; and therefore, the energy consumption can be reduced, the process is simplified, the cycle is shortened, the cost is saved, the product which is uniform in cells, moderate in cell diameter, low in volume density, low in water absorption rate, good in thermal insulation effect and high in mechanical strength can be obtained, and the additional value of high titanium blast furnace slag utilization is improved.

The invention provides a method for preparing a copper/ceramic composite substrate on the basis of low-melting-point glass powder. The method comprises the following steps: (1) preparing low-melting-point glass powder; (2) preparing an organic carrier; (3) preparing copper electronic paste; and (4) preparing a copper/ceramic composite substrate. According to the method, the BZBS glass powder which is prepared by employing a sol-gel method is used as a glass binder, and the copper powder is used as a functional phase, so that a copper thick film with good properties is obtained. The glass binder is good in wettability and relatively low in beginning wetting temperature, so that the thick film is sintered to be compacted, and good properties can be obtained. Meanwhile, the sintering temperature is kept for a period of time to melt the glass powder and to sufficiently wet the functional phase and the substrate, so that the increment of copper powder particles is facilitated, and the sintering is promoted.

The invention relates to an emulsion for a water-based intumescent fire-retardant coating and a preparation method thereof. The emulsion comprises the following raw materials: 40-46% of monomer, 0.08-1.5% of compound emulsifier, 0.18-0.25% of initiator, 0.2-0.4% of sodium bicarbonate, 0.02-0.03% of tert-butyl hydroperoxide, 0.015-0.025% of sodium formaldehyde sulfoxylate and the balance of deionized water; and the emulsion is prepared by a semi-continuous seed emulsion polymerization method. The obtained emulsion has good storage stability, the latex film softening temperature is lower than 100 DEG C, the melt viscosity is low (50-110Pa.s), the thermal stability is good, and the thermal decomposition interval is 286-590 DEG C and is matched with a major decomposition interval (270-620 DEG C) of a flame-retardant system; and the emulsion is suitable to be used as a base material of the water-based intumescent fire-retardant coating.

The invention discloses devitrification type lead-free low-temperature sealing glass as well as a preparation method and application method thereof. The devitrification type lead-free low-temperature sealing glass includes the following raw materials with the molar ratio of (0-10):(0-5):(20-40):(30-60):(5-30): B2O3, Al2O3, SiO2, MO (one or a mixture of MgO, CaO, SrO and BaO), and Bi2O3. Through the synergy between the Bi2O3 and the B2O3, the softening temperature range of the glass is reduced to 370-420 DEG C, and the coefficient of thermal expansion within the range of 150-300 DEG C reaches 1.2 minus 1.4*10<-5>/K, so that the sealing performance of the glass is remarkably improved; meanwhile, the sealing glass has good stability while being placed in hot water with the temperature of 80 DEG C for 1,000 hours, so that the sealing glass is applicable to electronic material and other low-temperature sealing fields. The raw materials for preparation of the sealing glass are simple and easy to get, the process is stable, simple and feasible, the cost is low, and the requirements for practicality and industrialization are met.

The invention provides a frit mixture which comprises glass powder, wherein the glass powder comprises low-melting-point frit and a filler, and the low-melting-point frit comprises 60-80 wt% of Bi2O3, 1-10 wt% of SiO2 and 1-10 wt% of ZnO. The frit composition can be applied to airtight type sealing of an electrical element, the glass transition temperature and the softening temperature are reduced, excellent low-temperature firing stability is shown, electrical devices are protected, and energy is saved.

The invention discloses low-temperature lead-free glass powder for a vehicle front windscreen laminated glass ink, and a preparation method thereof, wherein the low-temperature lead-free glass powder contains, by mass, 15-25% of SiO2, 45-60% of Bi2O3, 4-12% of ZnO, 1.5-4.0% of Na2O, 0.5-2.5% of K2O, 0.3-1.0% of Al2O3, 5-10% of B2O3, 0.4-1.3% of F2, 0.5-1.0% of TiO2, and 2.5-3.8% of ZrO2. The low-temperature lead-free glass powder of the present invention has characteristics of low softening temperature, wide softening temperature range, suitable expansion coefficient, high acid resistance, high alkali resistance, high adhesion, and the like.

A method and apparatus for making a substantially void-free preform for a microstructured optical fiber using a one-step process is provided. A preform is prepared from specialty glasses using a direct extrusion method. A die for use with the direct extrusion method is also provided, and a method for drawing the preform into a HC-PBG fiber for use in transmitting infra-red wavelength light is also provided. The preform comprises an outer jacket made of solid glass, a cladding having a plurality of air holes arranged in a desired pattern within the jacket, and a core which is hollow.

The invention provides continuous casting mold fluxes specific for production of medium-high carbon steel and alloy steel. The mold fluxes are applicable to the production of the medium-high carbon steel and the alloy steel with a carbon content ranging from 0.26 to 1.0 weight percent by a thin slab continuous casting machine. The mold fluxes mainly comprise the following components in weight percentage: 23.0 to 31.0 percent of SiO2, 22.0 to 29.0 percent of CaO, 4.0 to 6.0 percent of MgO, 2.5 to 4.5 percent of Al2O3, less than or equal to 1.3 percent of Fe2O3, less than or equal to 1.0 percent of MnO2, 10.0 to 13.0 percent of Na2O, 8.7 to 12.0 percent of F and 7.0 to 10.0 percent of C. The mold fluxes of the invention have relatively low crystallization and softening temperatures, so when the medium-high carbon steel and the alloy steel with a relatively low liquidus temperature are poured, the lubrication of a non-Newtonian fluid and the probability of surface cracking caused by the inhomogeneous heat dissipation of a casting slab due to the crystallization are greatly reduced in a relatively low crystallization and softening temperature range.

The invention relates to a method for preparing ceramic tiles from calcium silicate slag, belonging to the field of comprehensive utilization of resources and novel technologies for ceramic preparation. The ceramic tiles contain the following raw materials in percentage by weight: 30-60% of calcium silicate slag, 10-30% of clay, 2-25% of quartz, 0-20% of feldspar, 0-10% of pyrophyllite, 0-10% of green coke and 0-10% of talc. According to the method, ceramics are produced from calcium silicate slag, so that the stacked discharge of calcium silicate slag is reduced, the aim of resource recycling is achieved, and a new way for the high-added-value utilization of calcium silicate slag is added; the utilization ratio of calcium silicate slag in calcium silicate slag ceramics can reach 60%; by using the characteristic that a great deal of alkali metal ions are contained, a feldspar raw material can be replaced partially or totally, and the ceramic tiles are produced under the low-temperature condition of 1,130-1,180 DEG C; all properties of the ceramic tiles prepared by the method disclosed by the invention are better than the national ceramic standards.

The invention relates to a bamboo middle-density fiber plate, made from bamboo and Japanese cedar, wherein it is formed by 50-95 Japanese cedar sheets, 1-100 bamboo sheets, 8-15 urea-formaldehyde glue, 0.5-5 anti-fungus agent, 0.2-3 solidifier, and 1-3 ceresin wax. And its preparation comprises that: putting bamboo sheets into solution while NaOH is 1-5% of bamboo weight; at 80-130Deg. C and 0.5MPa pressure, boiling it for 10-15min, to be mixed with Japanese cedar sheets, to be grinded and dried; plating urea-formaldehyde glue added with anti-fungus agent, solidifier and wax emulsion on the fiber to be thermally compressed.

The invention discloses a preparation method of aluminum conductive paste of a high-performance environment protection solar cell. The aluminum conductive paste produced by the method is free of lead and solves the problem of environment pollution. The linear expansion coefficient of lead-free glass powder obtained in the preparation process is close to that of a silicon chip, and the success rate after burning is improved. The preparation method of the paste comprises the following steps: (1) preparing glass powder; (2) preparing inorganic adhesive glass metal powder; (3) manufacturing organic carriers; (4) adopting carbon powder of 2-5 mu m for later use; and (5) preparing the aluminum conductive paste: taking the following components by mass percent: 75-85% of aluminum powder coated by aluminum nitride, 9-20% of organic carrier, 3-4% of inorganic adhesive glass metal powder and 1-3% of C powder, wherein the total amount is 100%, and after mixing, grinding with a three-roller mill to particle size of 15-30 mu m to obtain the product with the viscosity of 25000-35000 mpa.s.

The invention relates to a bamboo middle-density fiber plate, made from bamboo and Japanese cedar, wherein it is formed by 50-95 Japanese cedar sheets, 5-50 bamboo sheets, 8-15 urea-formaldehyde glue, 0.5-5 anti-fungus agent, 0.2-3 solidifier, and 1-3 ceresin wax. And its preparation comprises that: putting bamboo sheets into solution while NaOH is 1-5% of bamboo weight; at 80-130Deg. C and 0.5MPa pressure, boiling it for 10-15min, to be mixed with Japanese cedar sheets, to be grinded and dried; plating urea-formaldehyde glue added with anti-fungus agent, solidifier and wax emulsion on the fiber to be thermally compressed.

The invention discloses frit for front silver paste of a monocrystalline silicon solar cell as well as a preparation method and application of the frit. The glass frit comprises a main glass frit andan auxiliary glass frit, wherein the main glass frit comprises 55-90 mol% of TeO2, 1-30 mol% of Li2O, 5-20 mol% of ZnO and 1-10 mol% of X; and the auxiliary glass frit comprises 1-50 mol% of PbO, 1-40mol% of Bi2O3, 1-30 mol% of Li2O and 1-30 mol% of Y. The main glass frit and the auxiliary glass frit for the front silver paste of the monocrystalline silicon solar cell are compounded for use, so that the silver paste has excellent properties of the main glass frit and the auxiliary glass frit, and has the characteristics of low series resistance, high open-circuit voltage and high tension. After the main glass frit and the auxiliary glass frit are compounded, the glass is not sensitive to temperature change, so that the glass has a wide sintering window. The front silver paste can be applied to a single crystal PERC silicon wafer and can also be applied to a double-sided aluminum oxide monocrystalline silicon wafer.

The invention discloses a special glass fiber reinforced plastic panel material of an electric cabinet. The panel material is manufactured by using the following raw materials in parts by weight: 30-35 parts of epoxy acrylic resin, 30-40 parts of glass fiber, 3-5 parts of furane resin adhesive, 2-4 parts of polytetrafluoroethylene, 0.1-0.3 part of graphite powder, 1-2 parts of curing agent and 2-4 parts of titanium dioxide powder. The special glass fiber reinforced plastic panel material has the technical effects that the manufactured panel material is small in density, light in weight, high in hardness, good in toughness, good in electric insulation, good in fire resistance, corrosion resistance, abrasive resistance and antistatic capability, time-saving and labor-saving to mount, safe and reliable; the service life of the electric cabinet is prolonged.

The invention discloses an optical glass, comprising the following components: 40wt%-55wt% of SiO2, 5wt%-20wt% of B2O3, 13wt%-25wt% of Nb2O5, 3wt%-20wt% of R2O, 0-5wt% of WO3, 0-10wt% of ZrO2, 0-5wt% of BaO, and 0-0.5wt% of Sb2O3, wherein the R2O includes one or a plurality of components selected from a group of Na2O, K2O and Li2O. The optical glass provided by the invention does not need to be added with non-green elements. Experiment results show that the optical glass provided by the invention has a refractive index of 1.59-1.63, an abbe number of 42-47, which satisfies requirements of modern imaging equipment.

The invention relates to a hot melt adhesive for bonding a cable heat shrinkage bush. The hot melt adhesive comprises, by weight, 40-60 parts of ethylene-vinyl acetate, 10-20 parts of PE hot melt adhesive, 10-30 parts of a tackifying resin, 1-10 parts of wax and 0-5 parts of an assistant, and the modified PE hot melt adhesive is extrusion-grade linear PE. The hot melt adhesive for bonding a cable heat shrinkage bush has the advantages of required bonding strength, low-temperature use, good adhesion resistance, and satisfying of transport requirements after use.

The invention discloses a high energy graphene battery which comprises a battery anode prepared from graphene wrapped Li0.89Ti0.11FePO4, a solid electrolyte membrane prepared from a Li11Si2PS12 material and a battery cathode prepared from a graphene wrapped silica-based material; the solid electrolyte membrane is arranged between the battery anode and the battery cathode, and the Li11Si2PS12 solid electrolyte membrane is prepared by taking Li2S particles, SiS2 particles and P2S5 particles at a mole mass ratio of 11:4:1 as raw materials, performing grinding and mixing by a high energy ball milling method, preparing sheets by taking molten polyphenyl ether, and performing roll squeezing, hot press molding and chloroform soaking. The prepared graphene battery has the advantages of safety, stability, and high weight energy density, the high pressure is not required in a preparation process, and the preparation cost is low.

The invention discloses a benzoxazine resin with electroactivity and a preparation method thereof. The benzoxazine resin with electroactivity is prepared through thermal ring-opening, curing and crosslinking of benzoxazine monomer with electroactivity. The benzoxazine monomer with electroactivity is prepared from paraformaldehyde, phenol and primary amine intermediate with electroactivity, wherein phenol is any one selected from a group consisting of phenol, cardanol, bisphenol A, hydroquinone and biphenol. The benzoxazine resin with electroactivity provided by the invention has good electrical performance and excellent mechanical properties and thermal behavior and is widely applicable to fields like electrochromic devices, chemical sensors, anticorrosion coatings and medical biomaterials; the benzoxazine resin with electroactivity is free of release of small molecules in the process of curing, and a curing process is simple and can easily realize industrial production; the benzoxazine monomer with electroactivity has the advantages of flexible molecular designing, low melting temperature, low viscosity in a molten condition, etc.; meanwhile, the benzoxazine monomer with electroactivity is soluble in a plurality of low-boiling-point solvents like acetone and chloroform, and has excellent processability.