69 results about "Lead glass" patented technology

The invention relates to a large-size glass product with a natural ice crystal imitating effect and an industrial casting method of the large-size glass product. The product is a lead-free glass casting with the weight larger than or equal to 100 kg, dendritic crystal-shaped or snowflake-shaped devitrified phases which are formed by growing calcium fluoride as crystal nucleuses and are distributed randomly are arranged in the product, and the three-dimensional aesthetic effect imitating natural ice crystals is achieved. The method comprises the following steps: mixing lead-free glass particles with a calcium fluoride nucleating agent with a specific particle size, and filling a mixture into a special mold with a three-layer composite structure and a temperature monitoring function; and executing a four-stage programmed thermal regulation including melting homogenization, nucleation cooling, isothermal crystallization and super-slow multi-step annealing, wherein the melting and heat preservation time and the maximum thickness of the product meet the quantitative relation of t = k.H. Through systematic collaboration of materials, molds and processes, the technical problems that crystallization in large-size glass is not uniform and cracking is easily caused by thermal stress are solved, high yield and stable mass production of products of 500 kg or above are achieved, and the method is suitable for the fields of high-end buildings, art devices and decoration.

The invention relates to lead-free glass-coated copper powder for an HJT photovoltaic cell, conductive copper paste and a preparation method of the lead-free glass-coated copper powder and the conductive copper paste, the glass-coated copper powder comprises nano-copper powder and a coating layer on the surface of the nano-copper powder, and the coating layer is composed of bismuthate glass. According to the preparation method, a sol-gel method is adopted, the bismuthate glass is coated on the nano copper powder, the glass and the copper powder form a core-shell structure, the glass can be molten into a liquid phase during sintering, the contact between the glass and the copper powder is more uniform, and the oxidation resistance of the copper powder is enhanced. The prepared glass-coated copper powder can effectively isolate the copper powder from being in contact with an external oxidizing agent, excellent anti-oxidation protection is provided, the rapid oxidation point of the copper powder is increased by 100-150 DEG C compared with the rapid oxidation point of the copper powder before coating, and the service life of the copper powder is prolonged; meanwhile, the conductive copper paste has high stability, high reliability, low cost and high conductivity, and meets the environmental protection requirement.

1. The name of the designed product: lead glass protective window. 2. The use of the designed product: shielding against radiation. 3. The design points of the designed product: in shape. 4. The picture or photo that best shows the design points: perspective view 1.

The invention discloses an LED glass cement compatibility testing method, and relates to the technical field of LED testing, and the method comprises the steps: welding an LED at the center of a PCB; uniformly coating the bottom of the high-temperature-resistant glass bottle with glass cement, and after the surface of the glass cement is dried, enabling the opening of the high-temperature-resistant glass bottle to face downwards, surrounding the LED and inversely buckling the high-temperature-resistant glass bottle on the PCB; glass cement consistent with the bottle bottom is smeared on the peripheral side of a bottle opening of the high-temperature-resistant glass bottle, so that the LED and the glass cement at the bottle bottom are sealed in the closed space; putting the LED glass cement compatibility test device into a high-low temperature test box, setting the temperature to be 80 DEG C, the heating time to be 20 minutes and the relative humidity to be 50%, and performing constant-temperature aging for 500 hours; taking out the aged LED glass cement compatibility test device from the high-low temperature test box, separating the high-temperature-resistant glass bottle from the PCB, communicating a positive lead and a negative lead of the PCB with a circuit, electrifying the LED, measuring the aged color temperature value, and calculating whether the color temperature change rate, the color rendering index and the color tolerance of the LED reach set thresholds or not.

The utility model discloses a titanium cup inner wall lead-free glass coating device, which comprises a coating mechanism and a backflow mechanism, the coating mechanism comprises a pile, a hollow ring movably sleeved at the bottom end of the pile, and two liquid inlet pipes connected between the pile and the hollow ring. According to the utility model, after the pile is connected with external maneuvering equipment, the titanium cup is placed at the bottom of the material receiving disc, then the motor drives the gear shaft to rotate through the gear, and the two threaded rods synchronously and axially move under mechanical transmission, so that the peripheral edge of the material receiving disc is in close contact with the inner wall of the titanium cup; then, when lead-free molten glass is injected into the hollow ring and the coating nozzles through the liquid inlet pipe, the pile drives the coating nozzle group to descend at a constant speed, a plurality of nozzles are matched to realize gradient uniform coating of the inner wall of the titanium cup, and in the coating process, dripping molten glass which is not attached to a substrate and residual materials which flow back from the cup wall are separated from each other; and the titanium cups are effectively collected by a special structure of the material receiving disc, so that the forming quality of the titanium cups is effectively ensured.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

The utility model discloses a kind of air leakage prevention structures of lead-free glass sealing titanium cup, including container mechanism and detection mechanism, the container mechanism includes inner bag, cup cover of sleeve connection in the outer side of the inner bag, handle connected with the outer wall of the cup cover, screw cap is rotated with the top end of the inner bag, detection mechanism, the detection mechanism includes the heat preservation cavity formed between the inner bag and cup cover. In the utility model, once holder feels heat preservation duration, heat preservation effect reduces, holder can add a small amount of clean water in cambered surface position, then extrude push rod to the inside of cup cover, then rubber plug extrudes the air in heat preservation cavity, air surges along the outer wall of inner bag, then overflow from cup cover top air leakage position, overflow phenomenon specifically shows, air leakage position bubbles, then holder finds air leakage position, can be targeted for repair, avoid resources being wasted, and sustainable development environmental protection concept is combined.

The application discloses a solar cell and a preparation method thereof and a photovoltaic module, and relates to the photovoltaic field. The application comprises the following steps: preparing an electrode on a substrate; a composite paste for preparing the electrode comprises the following components: silver-coated copper powder 60-85%, inorganic glass powder 3-12%, organic carrier 10-30%, rare earth oxide 0-1%, silicon carbide 1-3%, and the total amount is 100%; wherein the inorganic glass powder is Bi2O3-B2O3-ZnO system lead-free glass powder; and the rare earth oxide is one or more of yttrium oxide, lanthanum oxide and cerium oxide. The electrode of the solar cell of the application can reduce the phenomenon of silver penetrating the polycrystalline silicon layer damaging the tunneling oxide layer, reduce the contact resistance, improve the adhesion, effectively passivate the interface, reduce the interface recombination, enhance the sintering network conductivity, and ensure that good electrode conductivity can be maintained at a lower silver content and the cost is reduced.

The invention discloses a resistor disc for a lightning arrester and a preparation method of the resistor disc. The resistor disc is prepared from the following components in parts by weight: 80-95 parts of modified zinc oxide, 3-6 parts of bismuth oxide, 1-4 parts of antimony oxide, 1-4 parts of cobalt oxide, 0.6-1.2 parts of nickel oxide, 0.6-1.2 parts of manganese oxide, 0.4-1.0 part of chromium oxide, 0.2-0.6 part of aluminum oxide and 1-4 parts of lead-free glass powder. Through two-step functional modification of the modified zinc oxide, the microstructure and macroscopic performance of the material are remarkably improved, so that the resistor disc has excellent nonlinear coefficient, low leakage current and high energy absorption capability, and the overall technical scheme not only improves the protection performance and service life of the lightning arrester, but also realizes lead-free environmental protection, energy conservation and consumption reduction, and has wide application prospects. And reliable guarantee is provided for safe and stable operation of a power system.

The invention provides sealing glass as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing materials according to a sealing glass formula, uniformly mixing, and carrying out first ball milling; the raw materials are subjected to high-temperature melting, clarification, leakage forming and annealing, and lead glass is obtained; crushing lead glass, performing secondary ball milling, sieving, preparing the obtained glass powder into slurry, coating the surface of the to-be-passivated area with the slurry, and performing heat treatment to form a glass passivation layer; and immersing the glass passivation layer into molten toughening molten salt, and carrying out chemical toughening treatment at a designed temperature to synchronously remove sodium ions, so as to obtain the high-strength low-leakage-current sealing glass. The technical problem to be solved is how to prepare the sealing glass which has higher strength and chemical stability on the basis of meeting the performance that low-melting-point glass can be used for electronic device packaging in the prior art, the strength of the sealing glass can reach 300 MPa or above, the expansion coefficient is 35 * 10 <-6 >-50 * 10 <-6 > / DEG C, and the sealing glass is excellent in insulating property and can be applied to electronic device packaging. And the requirements of development in the fields of semiconductor surface passivation and the like on a sealing glass material can be met.

The invention relates to the technical field of preparation of electronic components, and particularly discloses lead-free composite glass powder for side insulation of a resistor disc and a preparation method of the lead-free composite glass powder. The lead-free composite glass powder for side insulation of the resistor disc comprises the following raw materials in parts by weight: 90-110 parts of matrix glass powder and 10-30 parts of functional filler, and the matrix glass powder is vanadate-molybdate series lead-free glass. The lead-free composite glass powder is provided for the side face of the resistor disc, a compact insulating layer is formed after sintering, and the resistor disc has the advantages of being good in dielectric strength and good in durability.

In order to produce a crystalline silicon solar cell, a conductive paste is provided, which is suitable for the formation of an electrode by a laser treatment process, and which contains a lead-free glass frit. This conductive paste is used for forming an electrode of a solar cell, and contains (A) conductive particles, (B) an organic vehicle, and (C) a glass frit that does not substantially contain PbO, the product BGF * G of the alkalinity BGF of the glass frit (C) and the content G of the glass frit (C) in parts by weight in the conductive paste when the content of the conductive particles (A) in the conductive paste is taken as 100 parts by weight is in the range of 0.25-1.45.

The invention provides conductive silver paste special for a glass-based circuit board and a preparation method of the conductive silver paste. The conductive silver paste comprises, by weight, 60-90 parts of silver powder, 4-30 parts of polymer resin, 1.5-5 parts of inorganic filler, 0.05-0.5 part of auxiliaries and 5-20 parts of solvent. The silver powder is spherical and nano silver powder; the glass powder is lead-free glass powder, and the inorganic additive filler is glass powder, indium-tin alloy powder and an expansion coefficient adjusting material (nickel sulfide); the special conductive silver paste for the glass-based circuit board, provided by the invention, has the characteristics of easiness in printing, good solderability by using a lead-free solder after sintering, long service life of a finished product, high and low temperature climate resistance, acid, alkali and salt chemical corrosion resistance, and firm adhesion with a glass substrate without falling after long-term use.

The utility model relates to the technical field of diagnostic reagents, in particular to an elution device for placing a coating-free tube washing liquid, which comprises a base and a lead glass cover, a coating tube support is movably arranged on the base, and a push-pull component penetrating through the lead glass cover is arranged on one side of the coating tube support. A coating pipe support is arranged on the base, a plurality of coating pipes are arranged on the coating pipe support, a plurality of through holes are formed in the top of the lead glass cover, a washing liquid storage tank is arranged on one side of the base, and the washing liquid storage tank conveys washing liquid into the coating pipes through a conveying pump and a washing liquid conveying pipe; a washing liquid suction device is arranged on the other side of the base and communicated with a buffer tank through an exhaust pipe, the buffer tank is communicated with a waste washing liquid storage tank through a connecting pipe, and the waste washing liquid storage tank sucks out washing liquid in the coating pipe through a washing liquid suction pipe. The elution device is reasonable in design, the washing liquid in the coating pipe can be conveniently added and sucked, the operation is simple and convenient, the labor intensity of workers is reduced, and the safety risk is also reduced.

The utility model provides an XRF spectrum scanning anti-radiation device. The XRF spectrum scanning anti-radiation device comprises an adjusting hole, a first fixing plate, an upper cover plate, an instrument operation window, a second fixing plate, a movable adjusting plate, protective lead glass, an instrument support, a sample table, a third fixing plate, a linear guide rail, a sliding block, a connecting fixing piece, a limiting block and a limiting jackscrew. A protective structure is mainly made aiming at radioactivity of an X-ray fluorescence spectrum component, after a geological sample is placed on the sample table, the positions of the radiation-proof movable adjusting plates on the two sides are adjusted up and down, so that the lower edge of the radiation-proof movable adjusting plates is just fixed at a position which does not interfere with the upper surface of a sample to be detected; the movable adjusting plate effectively shields the X-rays overflowing during testing of the X-ray fluorescence spectrum component, and the technical problem that the X-rays have great radiation damage to human bodies during detection of geological samples is solved.

The conductive paste provided by this invention comprises a conductive metal, lead-free glass powder, and an organic binder. The conductive metal and the lead-free glass powder constitute the total solids content, wherein the content of the conductive metal in the total solids content is 75-99.8 wt%, and the content of the lead-free glass powder is 0.2-25 wt%. The lead-free glass powder is a Te-Bi oxide system, which includes tellurium oxide and bismuth oxide. Tellurium oxide, as a glass network former, mainly determines the softening point and fluidity of the glass, effectively reducing the melting point and imparting good fluidity. Bismuth oxide, as a network modifier, can regulate the chemical activity of the glass, allowing it to moderately corrode the passivation layer during sintering and promoting the formation of silver-silicon ohmic contacts. Adjusting the ratio of the two within this range allows for precise matching of the sintering temperature curves of different crystalline silicon solar cells, broadening the process window for lead-free glass. Furthermore, this invention also provides a method for preparing the conductive paste.

The invention relates to the technical field of material characterization and nondestructive testing, and discloses an X-ray metal stress rapid detection device, which is characterized in that a composite sensing head comprises six groups of line laser scanning heads, a micro-focusing X-ray tube, a CMOS detector, an infrared thermal imager and an ultrasonic transceiver; the dynamic pose system ensures vertical incidence of X-rays through a six-axis mechanical arm and an inclination angle compensation platform; the high-frequency processing module fuses the multi-physical field data and generates a stress nephogram through an AI algorithm; the safety protection structure comprises an electromagnetic shielding cover and a lead glass window. The six-axis mechanical arm is combined with the dip angle compensation platform to dynamically adjust the incident angle of the X-ray, it is ensured that the X-ray always vertically enters the curved surface, Bragg condition misalignment caused by dip angle deviation is eliminated, seven kinds of stress field data such as residual stress, thermal stress and defect stress can be synchronously collected, and dynamic stress calculation larger than or equal to 20 kHz is achieved through the high-frequency processing module.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

The invention discloses OLED glass frit slurry for low-energy laser sealing and a preparation method thereof, and relates to the technical field of OLED glass frit slurry, the OLED glass frit slurry comprises the following components: basic glass frit: V2O5, TeO2, BaO and ZnO; the reinforcing system is prepared from ZrO and TiO2; the photothermal conversion agent is CeO; a thermally stable ceramic filler: cordierite; the dispersing agent is prepared from polyvinylpyrrolidone and sulfonated lignin; the organic carriers including ethyl cellulose, terpilenol and butyl carbitol are introduced into a composite dispersant system by constructing a lead-free glass network and combining the synergistic effect of the photothermal conversion agent and the surface modification filler, and particle aggregation is inhibited by utilizing the synergistic effect of a macromolecular chain and a functional group, so that low-energy laser sealing is realized, thermal damage to an OLED device is reduced, and the service life of the OLED device is prolonged. And meanwhile, the sealing airtightness, the interface bonding strength and the long-term reliability are improved.

The invention discloses a solar cell, a preparation method thereof and a photovoltaic module, and relates to the photovoltaic field. The method comprises the steps of preparing an electrode on a substrate; the composite slurry for preparing the electrode comprises the following components: 60-85% of silver-coated copper powder, 3-12% of inorganic glass powder, 10-30% of an organic carrier, 0.05-1% of rare earth oxide and 1-3% of silicon carbide, totaling 100%. Wherein the inorganic glass powder is Bi2O3-B2O3-ZnO series lead-free glass powder, and the inorganic glass powder is B2O3-ZnO series lead-free glass powder The rare earth oxide is one or more of yttrium oxide, lanthanum oxide and cerium oxide. According to the electrode of the solar cell, the phenomenon that silver penetrates through the polycrystalline silicon layer to damage the tunneling oxide layer can be reduced, the contact resistance is reduced, the adhesive force is improved, an interface is effectively passivated, interface recombination is reduced, the conductivity of a sintering network is enhanced, and it is ensured that good electrode conductivity can be maintained and the cost is reduced under the condition that the silver content is low.

The present application relates to a kind of anti-radiation super high performance recycled concrete and its preparation method, belong to building material and solid waste resource utilization technical field.The concrete is the synergistic reaction of the multi-source silicon-aluminum precursor of the main ground blast furnace slag and alkali activation liquid, does not contain Portland cement, combined with the nickel iron slag recycled sand of particle size refinement, the shielding reinforcing filler (lead glass and barite) of compound and high-performance copper-plated steel fiber, form dense structure and excellent mechanics, durability and radiation protection performance.The method realizes the high-value reuse of industrial solid waste, has excellent green environmental protection, engineering adaptability and long-term stability, is suitable for nuclear facilities, radioactive sites and other high protection demand scenarios.

The invention relates to the technical field of ceramics, and discloses a method for producing a ceramic product with an anti-counterfeiting function by using a high-temperature-resistant upconversion material, the high-temperature-resistant upconversion material is added into an underglaze color material, and the addition amount is 3-5wt% of the total weight of the underglaze color material; drawing a pattern on a ceramic body by adopting the underglaze color material; applying transparent glaze; sintering at the temperature of 1100 to 1320 DEG C; or coating the slurry A on the surface of the ceramic body; locally covering the slurry B; sintering at the temperature of 690 to 820 DEG C; the slurry A comprises lead-free glass powder and a blender; the slurry B comprises a decorative pigment, a blender and a high-temperature-resistant upconversion material; the addition amount of the high-temperature-resistant upconversion material is 1-5wt% of the total weight of the slurry B; wherein the high-temperature-resistant up-conversion material is YSZ: x mol% of Er < 3 + > and y mol% of Yb < 3 + >; 0 < x < = 6, and 0 < y < = 20. The high-temperature-resistant up-conversion material disclosed by the invention still has efficient luminescence performance after being subjected to secondary high-temperature sintering, and has a wide application prospect in the technical field of ceramic tracing and authentic identification.

The utility model discloses a stress buffer structure of leadless glass ring seal joint of titanium cup mouth part, including the mechanism that holds, the mechanism that holds includes titanium cup, the top of titanium cup is provided with annular wave groove, the inside wall of annular wave groove has sprayed transition coating, the top of titanium cup is equipped with glass ring, glass ring bottom is compatible with annular wave groove. In the utility model, the annular wave groove is formed through precision numerical control processing or laser etching at the cup mouth position of titanium cup, then the transition coating of silicon oxide is plated on the inside wall of annular wave groove by using chemical vapor deposition, then the molten glass ring is buckled on the top of annular wave groove, thereby completing the sealing operation, in the whole sealing process, annular wave groove prevents stress concentration, then the transition coating guarantees the wettability of glass melting and titanium, effectively buffers stress, and the product quality is stable.

The utility model discloses a radiation isolation protection device, which belongs to the technical field of medical radiation protection, and comprises a positioning partition plate and lead glass arranged on the positioning partition plate, a fixing plate is fixedly mounted on one side of the positioning partition plate, protection gloves are arranged on the lead glass at equal intervals, and a lifting groove is formed in the fixing plate. A bearing mechanism is arranged on the fixing plate and comprises a bearing cushion block movably inserted into the lifting groove in a penetrating mode and a base fixedly installed at the lower end of the bearing cushion block. A lifting groove is formed in a fixing plate and used for allowing a bearing cushion block to be adjusted in a vertical lifting mode through an air cylinder till the bearing cushion block is lifted to the height suitable for placing the arm of the patient, at the moment, the arm of the patient is placed at the upper end of the bearing cushion block, the bearing cushion block supports the arm of the patient, and meanwhile the arm of the patient is supported through guiding of the bearing cushion block. By matching with lead glass, radiation-proof isolation protection can be provided for medical staff, and the medical staff can conveniently inject medicaments into a patient by using the protective gloves.

Provided are a soft magnetic composite material plate capable of reducing iron loss more than before without significantly impairing magnetization characteristics inherent to a soft magnetic material, and an iron core and a rotary electric machine employing the soft magnetic composite material plate. A soft magnetic composite material plate according to the present invention is characterized in that it is obtained by combining a soft magnetic material and an electrically insulating film. The soft magnetic material has a filament shape. The electrically insulating film contains a lead-free glass composition and has a linear expansion coefficient smaller than that of the soft magnetic material by at least 3 ppm / K. The electrically insulating film is formed on the surface of the filament-shaped soft magnetic material to form a soft magnetic composite wire. The soft magnetic material and the electrically insulating film are integrated so that the longitudinal direction of the soft magnetic composite wire is arranged in the in-plane direction of the plate shape of the soft magnetic composite material plate.

The invention discloses lead-free glass powder for passivation of mesa type semiconductors and application of the lead-free glass powder, the lead-free glass powder comprises base material powder and crystal substance and / or quartz glass powder, the base material powder comprises, by weight, 35%-55% of ZnO, 0-10% of B2O3, 25%-40% of SiO2, 5%-40% of Y2O3, 0.01%-10% of RO and 0.01%-5% of RxOy, RO is at least one of CaO, BaO, MgO and SrO, and RxOy is at least one of SnO2, In2O3, ZrO2, TiO2, Bi2O3, La2O3, Nd2O3, GeO2, CeO2 and MnO2; the crystal substance is at least one of ZnO, ZnOB2O3, 2ZnOSiO2, 3ZnOB2O3, 4ZnOB2O3 and 2MgO. 2Al2O3. 5SiO2, relative to 100 g of the base material powder, the dosage of the crystal substance is 0.01-10 g, and the dosage of the quartz glass powder is 0-5 g. By increasing the content of SiO2 in the glass powder, the acid resistance of the material is improved. The stable and uniform glass is obtained by reducing the main component ZnO, reducing B2O3, increasing the content of Y2O3 and adding RO to generate a synergistic effect.

The utility model discloses an improved observation window for a coating chamber. The improved observation window comprises an observation window main body and a rotary stroboscopic unit mounted on the observation window main body, the observation window main body comprises a main shell and a window unit, and an observation position and a stroboscopic position are formed on the main shell; the window unit is mounted on the observation position and comprises a window frame flange penetrating through the main shell and an anti-radiation metal net and a lead glass sheet which are mounted in the window frame flange in tandem, and observation can be performed from the observation position to the coating chamber through the anti-radiation metal net and the lead glass sheet; the rotary stroboscopic unit comprises a stroboscopic driving motor arranged on the outer surface of the stroboscopic position and a stroboscopic turntable arranged on the inner surface of the stroboscopic position, a driving shaft of the stroboscopic driving motor is connected with the stroboscopic turntable, the stroboscopic driving motor drives the stroboscopic turntable to rotate, and the window unit is located in the rotation range of the stroboscopic turntable. And an observation slit is formed in the stroboscopic turntable along the diameter direction. According to the utility model, coating materials and radiation light can be blocked.

The invention discloses a low-temperature silver paste FPC (Flexible Printed Circuit) conductive film for an electronic cigarette, which comprises a base material layer, an insulating medium layer, a conductive circuit layer and a protective layer which are sequentially arranged from bottom to top, the low-temperature silver paste is prepared by mixing 60%-80% by mass of nano-silver particles, 5%-15% by mass of glass powder, 10%-25% by mass of an organic carrier and 0.1%-3% by mass of a functional additive. The preparation method comprises the steps of (1) base material pretreatment, (2) insulating medium layer coating, (3) low-temperature silver paste printing, (4) low-temperature curing forming and (5) protective layer coating. The thermal damage of the base material is effectively avoided through the low-temperature curing characteristic of the low-temperature silver paste, the requirements for lightening, thinning and diversification of the base material of the electronic cigarette are met, the nano-silver particles and the lead-free glass powder cooperate to construct a high-continuity conductive network, excellent conductivity and interface bonding force are guaranteed, and meanwhile environment friendliness, printability and stability are considered.

Providing a lead-free glass composition capable of maintaining the form of glass and exhibiting excellent fluidity during firing at a temperature in a low temperature region of higher than 400 °C to 500 °C, and having improved acid resistance SOLUTION: A sealing glass composition comprising, in terms of mol% on an oxides basis, 48 to 72% of TeO2, 8 to 35% of WO3, 2 to 15% of BaO, 1 to 15% of Bi2O3, and 0 to 20% of ZnO.SELECTED DRAWING: None

The invention discloses low-temperature sintering type porous copper-silver composite conductive paste and a preparation method, and belongs to the technical field of electronic materials. The low-temperature sintering type porous copper-silver composite conductive paste is composed of solid powder and an organic carrier, and the organic carrier accounts for 10-21% of the total mass; the solid powder is composed of a conductive functional phase and an inorganic binding phase; the conductive functional phase is composite metal powder of a porous copper framework, a silver pinning layer and an Ag-Pd alloy shell; the inorganic binding phase is composed of metal bismuth powder and lead-free glass powder. The preparation method comprises the following steps: preparing the composite powder, mixing and rolling the binding phase and the carrier, and sintering the slurry at low temperature. Through the synergistic effect of the porous composite powder and the bismuth-glass composite binding phase, the unification of low sheet resistance and high adhesive force of the conductive film layer is realized at low temperature, and meanwhile, the conductive film layer has the advantages of low cost and high reliability, and is suitable for the fields of flexible electronics and low-temperature co-fired ceramics.