1665 results about "Microcrystalline" patented technology

The invention discloses a glass ceramic thickness detection method and a related device, and the method comprises the steps: obtaining a vibration signal generated in a glass ceramic thinning and grinding process, and extracting a vibration dominant frequency, a frequency spectrum centroid frequency and a frequency band energy distribution ratio as thickness characteristic parameters through fast Fourier transform processing; three-dimensional position coordinates of the grinding head are obtained, space mapping and weighted average processing are conducted on the thickness characteristic parameters, and space distribution of the thickness characteristic parameters is obtained; performing process interference compensation and sliding window time sequence smoothing processing according to the grinding process parameters to obtain stable thickness characteristic distribution; based on the stable thickness feature distribution and the current grinding process, final thickness distribution is predicted, and a thickness qualification pre-judgment result is obtained; and extracting a time sequence change characteristic of the thickness characteristic parameter as a vibration evolution index, and performing comprehensive quality evaluation in combination with a thickness eligibility pre-judgment result. According to the scheme, the thickness can be detected in real time in the thinning and grinding process of the microcrystalline glass, and the production efficiency is improved.

The application provides a microcrystalline glass product, and components of the microcrystalline glass product are shown in percentage by weight, and the microcrystalline glass product contains SiO2: 40-55%; Al2O3: 15-30%; Li2O: 0.1-6%; ZnO: 9-20%; MgO: 0.1-6%; and TiO2: 0.5-7%. Through reasonable component design, the microcrystalline glass product obtained by the application has excellent mechanical properties and is suitable for display devices or electronic devices.

The present application relates to the technical field of glass-ceramics, in particular to a lithium-free transparent spinel glass-ceramics, a preparation method and application thereof. The lithium-free transparent spinel glass-ceramics is obtained by heat treatment of a base glass, and spinel crystal is the main crystal phase. The composition of the glass-ceramics contains the following oxides in mol%: SiO2 38.00-48.00%, Al2O3 25.50-30.00%, ZrO2 3.00-5.00%, MgO 5.00-8.00%, ZnO 8.00-14.00%, Na2O 7.20-14.00%, B2O3 3.00-8.00%, K2O 0-2.00%, and Y2O3 0-1.00%, and basically no Li2O. The glass-ceramics of the present application does not use high-cost lithium, and can obtain excellent surface and deep stress characteristics and excellent drop impact resistance through chemical strengthening.

The present invention relates to the technical field of microcrystalline glass, and in particular to a strengthened microcrystalline glass with high drop resistance, a preparation method and an application thereof, wherein the strengthened microcrystalline glass comprises a compressive stress layer and a tensile stress layer, and a spinel crystal is the main crystalline phase; the composition of the strengthened microcrystalline glass substantially does not contain Li 2 O; the strengthened glass-ceramics meets the following requirements: CS_50≥100MPa, |CT_AV|≥70MPa, DOL_0≥0.13t, where t is the thickness of the glass-ceramics. The strengthened glass-ceramics of the present invention have excellent deep stress characteristics, which, combined with the high intrinsic strength originally possessed by the glass-ceramics, give the strengthened glass-ceramics excellent mechanical properties, especially drop impact resistance. The strengthened glass-ceramics of the present invention can achieve a drop impact resistance effect that is far superior to that of existing spinel glass-ceramics, and can meet the application requirements of cover glass for high-end electronic products.

The present invention provides a spinel glass-ceramic, a chemically strengthened glass-ceramic and an application thereof. The spinel glass-ceramic comprises a main crystalline phase (Zn, Mg)Al2O4; the average transmittance of the spinel glass-ceramic with a thickness of 0.7 mm in a visible light range is less than or equal to 70.00%; the composition of the spinel glass-ceramic, expressed in molar percentage of oxides, comprises: SiO2 38.00 mol% to 48.30 mol%, Al2O3 25.50 mol% to 30.00 mol%, MgO 5.00 mol% to 8.00 mol%, ZnO 8.00 mol% to 14.00 mol%, ZrO2 3.00 mol% to 5.00 mol%, Na2O 7.20 mol% to 14.00 mol%, K2O 0.00 mol% to 2.00 mol%, B2O3 3.00 mol% to 8.00 mol%, Y2O3 0.00mol%~1.00mol%, BaO0.00mol%~2.10mol%; the composition of the spinel glass-ceramic does not include Li2O. The spinel glass-ceramic provided by the present invention has high intrinsic strength, and can be chemically strengthened to obtain chemically strengthened glass-ceramic with excellent drop impact resistance, which can meet the use requirements of electronic equipment protective glass. The spinel glass-ceramic provided by the present invention does not require the use of expensive lithium, and has better economic benefits compared to the existing lithium-containing spinel glass-ceramic.

The invention relates to the technical field of microcrystalline glass detection, in particular to a microcrystalline glass panel structural strength detection device. Comprising a driving mechanism, an impact head, a test board, a first container and a second container. The test bench is used for installing a to-be-tested microcrystalline glass panel. The driving mechanism is in transmission fit with the impact head, so that the impact head can periodically impact a to-be-tested glass ceramic panel mounted on the test board. The impact head is provided with an internal flow channel. The first container is used for containing hot fluid media, and the second container is used for containing cold fluid media. And the first container and the second container are communicated with the internal flow channel through a switch control mechanism. The switch control mechanism is used for alternately communicating one of the first container and the second container with the internal flow channel so as to adjust the temperature of the impact head. The structural strength of the microcrystalline glass panel can be specifically tested according to the application scene in the actual use process, the integrating degree of the test process and the actual application scene is higher, and the test result has higher reference value.

The invention relates to the technical field of temperature control, in particular to a nanocrystalline glass annealing treatment temperature dynamic monitoring control method and system, and the method specifically comprises the steps: capturing an unsteady thermal radiation signal in a glass internal microcrystalline phase change process in real time, and synchronously obtaining three-dimensional residual stress distribution data; dividing the annealing process into gradient crystallization control units according to the time-temperature transition characteristic of the glass; constructing a crystal phase evolution model, and dynamically analyzing the coupling relationship between the microcrystal nucleation rate and the residual stress of each gradient crystallization control unit; and a multi-target particle swarm optimization algorithm is adopted, and temperature field gradient distribution is corrected in real time in combination with grain boundary migration kinetic parameters. According to the invention, the problem of residual stress accumulation and grain size mismatch in a nanocrystalline glass annealing process in the prior art is solved.

The invention provides a composite silicon-carbon negative electrode material as well as a preparation method and application thereof. The composite silicon-carbon negative electrode material comprises a composite silicon-carbon inner core and a carbon coating layer arranged on the surface of the composite silicon-carbon inner core, the composite silicon-carbon inner core comprises a porous carbon skeleton and nano silicon particles, modified holes are formed in the porous carbon skeleton, graphite microcrystalline layers are arranged around openings of the modified holes, and the nano silicon particles are arranged on the surface of the porous carbon skeleton and in the modified holes. The modified holes are formed in the composite silicon-carbon negative electrode material, silicon particles can be properly deposited in the modified holes, and the graphite microcrystalline layer is arranged around the modified holes, so that the resistivity of the material can be greatly reduced, and the electrical property of the silicon-carbon negative electrode material is improved.

The invention discloses a combined passivation back contact battery which comprises an N-type silicon wafer, a second intrinsic amorphous silicon layer, a microcrystalline silicon layer, an anti-reflection layer, a second semiconductor opening region, a first semiconductor opening region and a transition region, the anti-reflection layer is a single-layer amorphous silicon carbonitride layer or a laminated structure composed of an amorphous silicon carbide layer and an amorphous silicon carbonitride layer, and the second semiconductor opening area is composed of a first intrinsic amorphous silicon layer, a P-type amorphous silicon layer, a transparent conductive film and a metal electrode which are sequentially arranged on the back face of the silicon wafer. The first semiconductor opening area is composed of a tunneling oxide layer, an N-type polycrystalline silicon layer, a transparent conductive film and a metal electrode which are sequentially arranged on the back face of the silicon wafer, and an opening is etched in the transparent conductive film on the surface of the transition area to form an insulation groove. Amorphous silicon carbonitride or amorphous silicon carbide / amorphous silicon carbonitride laminated layers are adopted as the anti-reflection layers, so that reflection loss is reduced, the reliability and durability of the cell are improved, and the conversion efficiency of the cell is improved.

The invention provides a near-infrared perovskite laser and a preparation method thereof. The near-infrared perovskite laser includes: a substrate; the perovskite gain dielectric layer is arranged on the substrate, a microcrystalline structure is formed on the perovskite gain dielectric layer, and the microcrystalline structure is a resonant cavity of the perovskite gain dielectric layer. The near-infrared perovskite laser provided by the invention can realize lasing under optical pumping at room temperature without adopting an additional resonant cavity, so that the device structure is greatly simplified, and the integration of the laser is improved; by regulating and controlling the components and the preparation process, the regulation of the lasing peak can be realized, the regulation precision is high, and the use requirements of multiple wavelengths can be met; a full-solution method can be adopted for preparation, the process is simple, and the cost is low.

The invention relates to the technical field of coating testing devices, and particularly discloses an induction cooker glass ceramic functional coating testing device which comprises a base and a detection box located on the base, a detection cavity is formed in the detection box, a testing table is arranged in the detection cavity, and the testing table comprises a testing execution mechanism and a testing placement seat; the test execution mechanism comprises a friction disc, an electromagnetic coil is arranged in the friction disc, and a groove which is spirally distributed is formed in the bottom of the friction disc; the test placement seat comprises a loading table of which the middle of the top is provided with a to-be-tested coating panel in a position corresponding to the friction disc, the periphery of the top of the loading table is provided with a convex check ring, the upper part of the convex check ring is provided with a nozzle corresponding to the to-be-tested coating panel, and the nozzle is communicated with a storage tank arranged at the bottom of the loading table through a pressurizing pipeline; a magnetorheological abrasive is stored in the storage tank; the device has the advantages of high test precision and real test simulation.

The invention belongs to the technical field of back contact cells, and particularly relates to a back contact cell with a specific passivation structure and a manufacturing method and application of the back contact cell. A second semiconductor layer in the back contact cell comprises an amorphous silicon layer and a second doped crystalline silicon layer which are sequentially arranged from the back face of a silicon wafer to the outside; the second doped crystalline silicon layer comprises a second doped microcrystalline region and second doped amorphous regions located on the two sides of the second doped microcrystalline region, the second doped microcrystalline region is located at the position corresponding to the second semiconductor opening region and makes contact with the conductive film layer, and the second doped amorphous regions are laid at the end of the side face of the first doped polycrystalline silicon layer and outside the back face of the adjacent part of the first doped polycrystalline silicon layer; wherein the crystallization rate of the second doped microcrystalline region is 5%-80%. According to the invention, the bulk resistivity of the second doped crystalline silicon layer can be greatly reduced, and the contact resistivity between the second doped crystalline silicon layer and the conductive film layer is also reduced, so that the series resistance of the cell is greatly reduced, the leakage current is effectively avoided, and the cell efficiency is improved.

The invention discloses a porous ceramic filter for liquid magnesium alloy purification and a preparation method thereof, and the porous ceramic filter comprises the following raw materials in percentage by mass: 70-85wt% of ceramic particles, 8-15wt% of multi-element oxide system microcrystalline glass brazing filler metal and the balance of a binder, al2O3-B2O3-SiO2-MgO-CaO multi-element oxide system microcrystalline glass brazing filler metal is adopted, under the condition of air atmosphere high-temperature calcination, a compact reaction layer containing a low-melting-point glass phase, an aluminum oxide phase, a magnesium aluminate spinel phase, a calcium aluminosilicate phase, a borate phase and a silicate phase is generated on the surfaces of ceramic particles of a porous ceramic filter through a chemical reaction; the magnesium alloy filter has high strength and good high-temperature stability, and the problems that the filter loses efficacy and magnesium alloy melt is polluted due to the fact that the filter is eroded by magnesium alloy liquid are effectively solved.

A high-strength, highly transparent nanocrystalline glass, a preparation method therefor, and a use thereof. The high-strength, highly transparent nanocrystalline glass uses precursor minerals mainly comprising synthetic aluminum-rich feldspar-like ceramic glass material, β-spodumene material, cordierite material, synthetic β-dicalcium silicate material, and magnesium aluminum spinel material for the main body of a feldspar-like matrix glass having a stable structure. Ultrafine zirconia powder having a particle size of less than 10 nm is used as a nucleating agent and microcrack damping and pinning agent, to control the formation of nanocrystals smaller than 100 nm in the glass body formed after melting. The volume percentage content of the nanocrystals is 50%-95%, and the nanocrystals together with the matrix glass form a high-strength, highly transparent nanocrystalline glass having a uniform microstructure. The obtained nanocrystalline glass has high hardness, high fracture toughness and high light transmittance, and is suitable for manufacturing various types of optical glass.

The invention discloses a microcrystalline texture glass cover plate and a preparation method thereof. The microcrystalline texture glass cover plate comprises a glass body; a series of surface microstructures are arranged on the surface of the glass body, the section of each surface microstructure is in a wave shape, compared with a common glass cover plate, the glass cover plate is endowed with more excellent optical and mechanical performance due to the special structure of the microcrystalline glass, and the requirements of high-end markets are better met when the glass cover plate is applied to consumer electronics cover plates. The diversification of the MASK design provides diversification of the texture effect of the microcrystalline glass, and specific requirements are met. And the surface of the microcrystalline glass is processed more accurately by the yellow light development technology and reaches the micron level. Pyramid morphology of particles on the surface of the microcrystalline glass is regulated and controlled through a wet etching process, uniform etching is carried out, the texture effect is brighter, and the hand feeling is finer and smoother.

A coating composition for a substrate, which includes: a microcrystalline cellulose composition, at least one silane, at least one acid catalyst, a liquid dispersion phase, and optionally at least one inorganic filler. Also, the use of this composition for the release coating of a substrate such as a paper surface or a metal surface. Finally, an article having at least one surface is coated with the coating composition.

The invention discloses a method for improving indoor heating. A circular heating electric stove wire electric stove, a stepless temperature and pressure regulator, a circular electric ceramic stove microcrystalline panel, an upper-layer stainless steel round barrel, a lower-layer stainless steel round barrel and water are matched for use, the water added into the lower-layer stainless steel round barrel is heated and boiled, and low-cost, high-efficiency and energy-saving effects are achieved by efficiently utilizing water vapor generated by heating. The invention discloses a noiseless indoor heating method. A simple and convenient mode is adopted, the comfortable and ideal temperature requirement is met, and the indoor heating method which is low in cost, environmentally friendly and free of noise and reaches about 24 DEG C is achieved. Under different environment conditions, the heating temperature and the heating time are set according to respective requirements; the heating device is simple in structure and convenient to use, continuous heating is conducted for 60 minutes at the power of 200 W-300 W in a room with the area of 15 square meters, and electricity consumption displayed by an electricity meter is 0.10 yuan to 0.15 yuan and is far lower than the electricity consumption cost of air conditioner heating and is only equivalent to about 50% of the concentrated heating cost.

The invention relates to the technical field of rock plates, and particularly discloses a microcrystal colored crystal rock plate and a production process thereof, and the production process comprises the following steps: S1, cooling a pressed green body, and then spraying ground glaze; s2, a pattern layer is printed on the ground coat layer in an ink-jet mode, digital glue is printed after positioning, colored crystal dry particles are applied, drying is carried out after redundant dry particles are removed, transparent microcrystal dry particles are applied after fixing protection glue is sprayed, and drying is carried out after fixing protection glue is sprayed; and S3, polishing after firing. The rock plate has diamond-like gloss through the high refractive index of the colored crystal particles, the microcrystal dry particles can achieve fine texture and high glossiness, and the fixing protection glue is applied to the microcrystal dry particles and the colored crystal dry particles, so that the effect of fixing the dry particles can be achieved, and the wear resistance and the antifouling property can be improved.

The invention discloses a negative electrode material and a preparation method and application thereof. The negative electrode material comprises an inner core and a coating layer coated outside the inner core, the inner core is microcrystalline graphite with a porous structure, the coating layer is a carbonized material and comprises a cross-linking layer and a compact layer, the surface of the microcrystalline graphite is coated with the cross-linking layer, and the surface of the cross-linking layer is coated with the compact layer; wherein the cross-linking layer is formed by carbonizing heavy components in a coating agent on the surface of the microcrystalline graphite, the compact layer is formed by carbonizing weak polar groups in the coating agent, and the graphitization degree of the compact layer is greater than or equal to 94%. The negative electrode material disclosed by the invention can effectively reduce side reaction and structural breakage in the charge-discharge process, enhance the overall conductivity, and finally improve the first efficiency, the specific capacity and the cycling stability of the battery.

The invention discloses compression-resistant glass and a preparation method thereof, and relates to the technical field of special glass. When the compression-resistant glass is prepared, an anorthite crystal phase is used as a main material, a wollastonite crystal phase is used as an auxiliary material, and zinc, barium, boron, sodium, antimony and titanium elements are added, so that the compression-resistant glass ceramic is prepared; the preparation method comprises the following steps: mixing tetraethoxysilane, zirconium oxychloride octahydrate and 3-glycidyl ether oxypropyl trimethoxy silane, adding hydrochloric acid, and stirring to obtain modified sol; the preparation method comprises the following steps: mixing hydroxyl-terminated polysiloxane, trimethyl ethyoxyl silane, methyl triethyoxyl silane and octadecyl triethyoxyl silane, adding a hydrochloric acid solution, and reacting to prepare an organosilane modified solution; mixing the modified sol and the organosilane modified solution, coating the surface of the compression-resistant microcrystalline glass with the mixture, and curing to obtain the compression-resistant glass. The compressive glass prepared by the invention has the advantages of high compressive strength, hydrophobicity, wear resistance and high surface hardness.

The utility model provides a crystallization roller way kiln for improving crystallization warping of microcrystalline glass. The crystallization roller way kiln comprises a furnace body with a hearth, an inlet is formed in one side of the furnace body, and an outlet is formed in the other side of the furnace body; a conveying device for conveying from the inlet to the outlet is arranged in the hearth; a temperature control system and a temperature control device matched with the temperature control system are arranged in the hearth; from the inlet to the outlet, the temperature control system comprises a heating unit and a cooling unit which are connected in sequence; the temperature control device comprises a top temperature control device and a bottom temperature control device which operate independently; and the conveying device is arranged between the top temperature control device and the bottom temperature control device. According to the crystallization process of the microcrystalline glass, the crystallization roller kiln disclosed by the utility model not only solves the problem that the microcrystalline glass is warped in the crystallization process, but also can correct and repair the warped microcrystalline glass by independently regulating and controlling the temperatures of the tops and the bottoms of the heating unit and the cooling unit.

The invention discloses a preparation method of an intrinsic passivation structure, the intrinsic passivation structure and a battery, the intrinsic passivation structure comprises a base layer, the surface of which is provided with a first interface layer; the first intrinsic layer is arranged on the first interface layer, and a second interface layer is arranged on the surface of the first intrinsic layer; the second intrinsic layer is arranged on the second interface layer, and a third interface layer is arranged on the surface of the second intrinsic layer; and the doped microcrystalline silicon layer is arranged on the surface of the third interface layer. According to the invention, the surfaces of the base layer, the first intrinsic layer and the second intrinsic layer are treated, so that the contact between the intrinsic amorphous silicon and the crystalline silicon substrate is effectively improved, the generation of nano twin crystals is inhibited, the passivation effect is enhanced, and the minority carrier lifetime is prolonged.

The invention provides a near-infrared perovskite laser without an external cavity and a preparation method thereof. The preparation method of the near-infrared perovskite laser without the external cavity comprises the following steps: dropwise adding a perovskite precursor solution on a substrate; covering a flexible thin film on the substrate, so that the perovskite precursor solution is uniformly distributed between the substrate and the flexible thin film; after the substrate is subjected to standing treatment, the flexible thin film is removed, the perovskite gain dielectric layer is obtained, the flexible thin film is used for inducing the perovskite precursor solution to grow a microcrystalline structure in the process of forming the perovskite gain dielectric layer, and the microcrystalline structure is a resonant cavity of the perovskite gain dielectric layer. According to the preparation method provided by the invention, high-temperature treatment such as heating or thermal annealing is not needed, the preparation process is simple, the cost is low, large-area preparation of the near-infrared perovskite laser without an external resonant cavity can be realized, and adjustment of the emission peak of the laser can be realized by regulating and controlling the components of the perovskite gain material and preparation process parameters.

The invention belongs to the technical field of aluminum alloy material preparation, and particularly relates to an optical microcrystalline aluminum material, a preparation method and application, an aluminum alloy ingot is extruded twice to obtain an extruded bar, the extrusion temperature is 275-325 DEG C and the extrusion ratio is 2-8 during primary extrusion, and the extrusion temperature is 375-425 DEG C and the extrusion ratio is 20-30 during secondary extrusion; the extruded bar is sequentially subjected to annealing treatment, drawing treatment and stabilizing heat treatment, the optical microcrystalline aluminum material is obtained, and the temperature of the stabilizing heat treatment is 90-240 DEG C; the grain size and the surface roughness are reduced, and meanwhile the hardness is improved.

The invention provides a manufacturing method of a photosensitive microcrystalline glass product with excellent mechanical properties. The manufacturing method of the photosensitive microcrystalline glass product comprises the following steps that photosensitive glass is formed, the photosensitive glass is subjected to a crystallization process to form the photosensitive microcrystalline glass, then the photosensitive microcrystalline glass is subjected to a chemical strengthening process to form the photosensitive microcrystalline glass product, and the photosensitive microcrystalline glass product contains SiO2, R2O, Li2O, Al2O3, ZrO2, CeO2 and Ag2O. And the R2O is one or two of Na2O and K2O. The photosensitive microcrystalline glass product obtained by the manufacturing method of the photosensitive microcrystalline glass product has excellent mechanical properties.

The invention discloses a method for preparing black microlite from molten ferronickel slag, which comprises the following steps: mixing the molten ferronickel slag with a hardening and tempering agent, and carrying out melting and heat preservation to obtain a homogenized molten mass; casting the homogenized molten mass into a mold to obtain a formed sample; carrying out crystallization treatment on the formed sample under the condition of a non-oxidizing atmosphere, and cooling to obtain black microlite; and the utilization rate of the ferronickel slag is effectively improved.

The invention relates to the technical field of arc-shaped microcrystalline panels, in particular to an arc-shaped microcrystalline glass plate and a preparation method and application thereof. The roughness of the inner and outer surfaces of the arc-shaped microcrystalline glass plate is less than or equal to 0.06 mu m; the radial unevenness A of the arc-shaped microcrystalline glass plate is less than or equal to 0.4%, and A = h / L * 100%; the axial unevenness B of the arc-shaped microcrystalline glass plate is less than or equal to 0.4%, and B = d / L * 100%. The arc-shaped microcrystalline glass plate provided by the invention has a flat and smooth surface, can avoid optical scattering, meets the visibility requirement, and has the advantages of good flatness, low radial unevenness and axial unevenness, no warping angle phenomenon and obvious visual distortion.

The present invention provides a strengthened glass ceramic and a preparation method and application thereof, the strengthened glass ceramic contains a petalite crystal phase and a lithium disilicate crystal phase, the strengthened glass ceramic has a compressive stress layer formed by chemical strengthening on the surface and a tensile stress layer inside, and the strengthened glass ceramic satisfies: (CS50 / DOL0) > = 0.332 * (surface CS / CTCV); dOL0 is greater than or equal to 0.187 t; 1.01% > = delta alpha > = 0.65%, and delta alpha = 5 * 10 <-5 > * CTAV + 0.0026. Under the condition of 80-mesh abrasive paper, the average height of the reinforced microcrystalline glass in falling failure can reach 1.30-1.80 m. Compared with the prior art, the reinforced microcrystalline glass disclosed by the invention has the advantages that the breaking resistance on rough ground is obviously improved, and the reinforced microcrystalline glass can be used as a protective cover plate material of intelligent terminal products such as mobile phones.

The invention provides an acid-blocking and aluminum-controlling composite modifier and a preparation method and application thereof, the modifier is composed of microcrystalline activated minerals, a silicon-calcium material, a biomass alkaline material and a microbial agent, and the microbial agent comprises rhizobium, trichoderma harzianum and pseudomonas fluorescens. The specific raw material ratio can be adjusted according to different requirements, and the effect of materials with different ratios on improving the soil acidity and improving the crop yield and quality is researched by adopting field trials, so that an acid soil conditioner formula is formed; the preparation method comprises the steps of ultrafine grinding, microcrystal activation, hybridization, mixing and the like, the microcrystal activation adopts an activator solution for treatment, and an organic binder is added in the hybridization process to form an organic-inorganic hybrid structure. The composite modifier can effectively improve the physical action effect and the chemical reaction speed of the acid conditioner, and can be used for improving acid soil.

The utility model discloses a heterojunction cell and a photovoltaic module, and relates to the technical field of photovoltaics. The heterojunction cell comprises a first transparent conductive layer, an n-type microcrystalline silicon layer, a first intrinsic amorphous silicon layer, an n-type monocrystalline silicon layer, a second intrinsic amorphous silicon layer, a p-type microcrystalline silicon layer and a second transparent conductive layer which are stacked in sequence. The heterojunction cell also includes a first electrode connected to the first transparent conductive layer and a second electrode connected to the second transparent conductive layer. Wherein the first transparent conductive layer comprises a first zinc oxide layer, a first indium tin oxide layer and a first titanium oxide layer which are stacked in sequence. The transparent conductive layer is arranged to be a composite layer structure made of three materials, so that the use amount of expensive indium tin oxide can be remarkably reduced, and the cost is reduced. The first conductive film with the composite layer structure can also relieve the problem of ultraviolet-induced degradation of the heterojunction cell, improve the performance stability of the cell and prolong the service life of the cell.