276 results about "Linear expansion coefficient" patented technology

The invention relates to the technical field of auxiliary power, in particular to an air supply device of an auxiliary power system. The device comprises an air inlet duct shell, an air inlet air pocket, an air inlet duct outer ring, an air inlet volute, a labyrinth ring, a locking unit and a rotor. The axial end face of the air inlet air pocket is coaxially connected with the air inlet channel shell in an abutting mode. The air inlet channel outer ring comprises an outer sealing cylinder and an outer extending ring which are coaxially and fixedly connected, and the axial end face of the outer extending ring is coaxially connected with the air inlet air pocket in an abutting mode. The air inlet volute comprises a volute positioning cylinder and a spiral air channel shell which are fixedly connected, and the end face of the air inlet volute coaxially abuts against the outer extending ring. The labyrinth ring is clamped between the air inlet channel outer ring and the air inlet volute, the inner peripheral wall and the outer peripheral wall are attached to the first sealing face and the second sealing face respectively, the radial linear expansion coefficient of the labyrinth ring is larger than that of the first sealing face and that of the second sealing face, the labyrinth ring comprises a ring body and a plurality of pressure reduction gear rings axially arranged at intervals, and a stepped pressure relief cavity is formed between every two adjacent pressure reduction gear rings. In this way, the problem that gas leakage is prone to occurring at the connecting position of the air inlet end shell of the auxiliary power system is solved.

The invention relates to a sample preparation method for coating thickness detection, which comprises the following steps: circularly heating and cooling a base material to obtain a weakly combined base material with a base material body and a coating locally separated; and forming a cut extending along the thickness direction of the coating in a local separation area of the coating of the weak combination base material to obtain a coating section sample vertical to the surface of the base material. Due to the difference of linear cutting expansion coefficients of a base material body and a coating, alternating thermal stress is initiated at the interface of the base material body and the coating through cyclic heating and cooling processes, so that the base material and the coating are controllably and locally separated, a weakly combined base material is obtained, and a cut extending in the thickness direction is prepared in the surface of the locally separated coating. A coating section sample perpendicular to the surface of the base material can be obtained through simple mechanical separation. The method can be used for efficiently preparing a coating sample with clear section and good integrity at low cost on the premise of not depending on expensive or high-damage equipment.

The invention relates to the technical field of sealing rings, and discloses a wide-temperature-zone sealing ring which comprises a sealing ring body, the sealing ring body comprises a sealing layer, a thin film layer and a compensation layer, the outer portion of the thin film layer is arranged in the sealing layer, and the outer portion of the compensation layer is arranged in the thin film layer; the sealing layer and the thin film layer are supported by different materials and are made of fully-sealed elastic flexible materials, and the thickness of the thin film layer is smaller than that of the sealing layer; the compensation layer and the sealing layer are supported by different materials, and the linear expansion of the materials of the compensation layer and the sealing layer is opposite; the thickness of the compensation layer is inversely proportional to the thickness of the sealing layer according to the linear expansion coefficients of the two materials. The materials of the sealing layer and the compensation layer are selected, so that the compensation layer expands at low temperature to offset lost sealing pressure, the compensation layer shrinks at high temperature to buffer excessive extrusion, uniform contact stress of the sealing ring is maintained in extreme temperature fluctuation, and the effect of zero-damage self-adaptive sealing in the whole temperature range is achieved.

The invention relates to the technical field of building construction intellectualization, in particular to a building construction intelligent monitoring system based on multi-source sensor data fusion. Comprising a data acquisition and storage unit; a data fusion processing unit; the construction state analysis unit uses an improved anomaly detection algorithm; a risk assessment early warning unit; and a visualization and decision-making unit. Through the dynamic adaptation module, the structural displacement feature weight is adjusted based on the construction stage parameters to preferentially extract the construction key stage structural features, and the structural material elastic deformation limit is corrected in combination with the material linear expansion coefficient and the temperature difference value; meanwhile, the dynamic critical generation module generates a risk critical judgment basis changing along with the construction process in combination with structural bearing capacity parameters and equipment mechanical stress limits in the construction stage, so that the problem that abnormal detection and risk judgment are lack of dynamic adaptability is solved; and the accuracy of personnel border crossing, equipment abnormity and structure abnormity identification and the adaptability of risk assessment are effectively improved.

An alpha-sialon phosphor which is represented by general formula (Cax, Euy) (Si12-(m + n) Alm + n) (OnN16-n), and which has an average linear expansion coefficient (alpha ') at 25-900 DEG C of 4.2-4.6 ppm / DEG C (inclusive). In the general formula, 0 < x < 2.0, 0 < y < = 0.5, 0.3 < = x + y < = 2.0, 0 < m < = 4.0, and 0 < n < = 3.0.

The invention relates to a low-stress phenolic curing epoxy composition, an intermediate and a preparation method of the low-stress phenolic curing epoxy composition, by introducing a polyfunctional POSS (Polyhedral Oligomeric Silsesquioxane) structure with epoxy cyclohexyl or a polyfunctional POSS structure with epoxy cyclohexyl and phenyl, the finally obtained composition has the characteristics of low curing shrinkage, high strength, low modulus, high heat resistance and the like after being cured by utilizing the structural characteristics of the polyfunctional POSS structure; and the glass transition temperature, the bonding strength and the linear expansion coefficient are kept unchanged.

The invention relates to the technical field of high polymer material ingredients, and discloses a low-linear expansion coefficient PCR-PP bumper material and a preparation method thereof.The low-linear expansion coefficient PCR-PP bumper material comprises a low-expansion inorganic core, an interface gradient coupling agent and a surface activity modifier, the interface gradient coupling agent forms a brush-like topology grafting layer with the grafting rate of 2.5%-4.5% on the surface of the low-expansion inorganic core, and the surface activity modifier forms a brush-like topology grafting layer with the grafting rate of 2.5%-4.5% on the surface of the low-expansion inorganic core; the surface activity regulator performs steric hindrance locking on the brush-like topological grafting layer through long-chain alkyl of the surface activity regulator. According to the preparation method, a gradient distribution interface layer with specific grafting density and chain segment length is constructed on the periphery of an inorganic core, so that an interface chain segment actively absorbs thermal expansion displacement of a matrix by utilizing conformation transformation; the thermal stress vector discontinuity between the filler and the matrix is eliminated, and an interface mechanical response mode is reconstructed to inhibit interface delamination and microcrack initiation while the overall linear expansion coefficient is inhibited.

The application belongs to the technical field of polymer composites, and discloses a low linear expansion coefficient polyphenylene sulfide composite material, a preparation method and application thereof. The composite material comprises 20-60 parts of polyphenylene sulfide resin, 40-80 parts of a low expansion filler system, 0.5-5 parts of a coupling agent, 0.1-1 part of a lubricant and 0.1-1 part of a toning agent. The low expansion filler system is at least two of a lamellar structure filler, a fibrous structure filler and a nano-sized filler. The polyphenylene sulfide composite material obtained has a low linear expansion coefficient while maintaining good mechanical properties through the limiting effect of the lamellar structure filler on the thermal expansion of the resin matrix, the reinforcing effect of the fibrous structure filler on the strength and modulus of the material and the improvement effect of the nano-sized filler on the filling structure and the interface state. The polyphenylene sulfide composite material can be applied to the fields of precision instruments, electronic packaging, electronics and electrical appliances, automobiles and aerospace, etc. which have high requirements for thermal dimensional stability.

A lens unit (100) is provided with a first lens barrel member (20), a second lens barrel member (30) held on the inner peripheral side of the first lens barrel member, a cylindrical spacer (40) disposed on the inner side of the first lens barrel member and made of a material having a higher linear expansion coefficient than the first lens barrel member and the second lens barrel member, and an annular elastic member (50) disposed on the inner side of the first lens barrel member. When the temperature of the lens unit increases, the spacer thermally expands in the optical axis direction, thereby pressing the second lens barrel member toward the object side in which the elastic member is disposed, and the second lens barrel member (30) moves toward the object side in which the elastic member is disposed as the elastic member is compressed in the optical axis direction. When the temperature of the lens unit drops, the elastic member restores in the optical axis direction as the spacer is thermally shrunk in the optical axis direction, and the second barrel member moves toward the image side in which the spacer is disposed as the elastic member restores in the optical axis direction.

The invention provides a glass substrate material and hard disk substrate glass formed by the glass substrate material, the glass substrate material contains 38%-63% by mole of SiO2, 12%-22% by mole of Al2O3 and 5%-32% by mole of MgO; the sum of the molar percentages of SiO2, Al2O3 and MgO is less than or equal to 100%. The glass substrate material has one of the following characteristics: i) Tg is 640-820 DEG C; ii) an elastic modulus of from 85 to 130 Gpa; iii) the Hv is in the range of 480 to 2000 kgf / mm < 2 >; and iv) the linear expansion coefficient at 30-380 DEG C is 25-64 * 10 <-7 > / k. Compared with a traditional hard disk substrate material, the glass substrate material disclosed by the invention is higher in strength and thermal stability and better in scratch resistance and wear resistance, and can meet harsh requirements of high-capacity and high-performance hard disks.

This invention relates to the field of polymer materials technology. It discloses a low-linearity polypropylene-talc composite material, its preparation method, and its applications. The material comprises the following raw materials in weight percentages: polypropylene resin: 50-65%, modified talc: 15-25%, ethylene-octene copolymer resin: 10-15%, modified flat glass fiber: 5-15%, basic magnesium sulfate whiskers: 3-10%, heat stabilizer: 0.3-1%, and antioxidant: 0.1-0.5%. This composite material exhibits advantages such as a low coefficient of linear expansion, excellent surface tension, and superior mechanical properties.

The present application relates to the field of polyolefins, in particular, to a polypropylene resin, a polypropylene resin composition and respective preparation methods thereof. The polypropylene resin comprises: (a) component A: 60-80 wt%, a high crystalline homopolymer polypropylene, the isotactic pentad fraction of which is greater than or equal to 96%; (b) component B: 20-40 wt%, an ethylene-propylene elastomeric copolymer, the ethylene-propylene elastomeric copolymer containing 50-70 wt% ethylene structural units and 30-50 wt% propylene structural units, based on the total weight of the ethylene-propylene elastomeric copolymer; the molar fraction of ethylene / ethylene / ethylene sequences EEE in the polypropylene resin is not less than 15%; the ratio of the melt mass flow rate of the component A and the polypropylene resin under the action of a 2.16 kg load at 230℃ is 1.5-3.5:1. The final polypropylene resin composition has the characteristics of low shrinkage, high modulus, high heat distortion temperature and low linear expansion coefficient.

The present application relates to the field of diesel engine piston forging, in particular to a diesel engine piston material, a diesel engine piston and a preparation method and a forging die thereof. The diesel engine piston material provided by the present application comprises the following components: Si: 14.1-18.3 wt%; Ni: 1.6-3.2 wt%; Fe: 0.8-1.6 wt%; Mg: 0.3-0.6 wt%; Cr: 0.01-0.05 wt%; Zn: 0.06-0.3 wt%; Ti: 0.02-0.2 wt%; Zr: 0.07-0.2 wt%; V: 0.1-0.18 wt%; Al: balance. The piston material is applied to piston preparation, the layered temperature of the forging part is maintained during the forging process, the deformation and forming performance of the piston material is improved, the linear expansion coefficient is reduced, the volume stability is improved, the thermal deformation amount is reduced, and the service life of the piston is improved.

The invention discloses an embedded ceramic matrix composite turbine outer ring for an aero-engine in the technical field of aero-engine parts, and the embedded ceramic matrix composite turbine outer ring for the aero-engine comprises a turbine case, a plurality of turbine outer rings are arranged in the turbine case, the plurality of turbine outer rings are circumferentially distributed, and the turbine outer rings are arranged in the turbine case. A special-shaped bolt is arranged between the turbine outer ring and the turbine case, and the special-shaped bolt and the turbine outer ring are correspondingly arranged. By arranging the special-shaped bolt and spring composite connection structure, the problem that the connection mode is poor in connection reliability in application of the ceramic matrix composite is solved, firstly, the special-shaped bolt is matched with the limiting groove, and the pre-compression spring is combined to form elastic constraint; the continuous elastic force of the spring counteracts the thermal deformation stress caused by the difference of linear expansion coefficients of the CMC and the high-temperature alloy, meanwhile, working vibration is restrained, rigid collision between the turbine outer ring and the casing is avoided, and the blade tip gap fluctuation risk is remarkably reduced.

A liquid discharge head includes a nozzle plate, a piezoelectric element substrate, a functional substrate, and a common channel substrate. The nozzle plate has multiple nozzles to discharge a liquid in a discharge direction. The piezoelectric element substrate is bonded to the nozzle plate. The piezoelectric element substrate includes: multiple individual chambers; a diaphragm; and multiple piezoelectric elements on the diaphragm. The piezoelectric element substrate has: a first linear expansion coefficient; and bending portions disposed at each end or at each corner of the piezoelectric element substrate. The bending portions bend in the discharge direction. The functional substrate has a first face bonded to the piezoelectric element substrate. The common channel substrate is bonded to a second face opposite to the first face of the functional substrate. The common channel substrate has a second linear expansion coefficient larger than the first linear expansion coefficient of the piezoelectric element substrate.

To provide an electric pump that is made lightweight and can suppress deterioration in pump efficiency even when the temperature changes.SOLUTION: An electric pump 1 comprises: a motor 2 having a resin motor case 5 that accommodates a stator 3 and a rotor 4 and has a plurality of projections 5c rising from a bottom 5b; a driven part D connected to the motor 2; a cylindrical part 12a that abuts on the bottom 5b of the motor case 5 in an axial direction and rotatably accommodates the driven part D; a cover 12d that closes the side of the cylindrical part 12a opposite to the motor case; and an opposing part 12c that is separated from and opposed to the projections 5c in the axial direction. The axial lengths of the driven part D and the cylindrical part 12a are equal to each other, and the driven part D and the cylindrical part 12a have a linear expansion coefficient of 10×10-6 / K to 25×10-6 / K inclusive.SELECTED DRAWING: Figure 1

The invention discloses an epoxy filling adhesive for semiconductor packaging and a preparation method thereof, and the epoxy filling adhesive for semiconductor packaging comprises the following raw materials by weight: 25-35 parts of an epoxy nanometer silicon resin material; 50-60 parts of a filler with a low linear expansion coefficient; 2-5 parts of a rheological additive; 1-2 parts of a dispersant; 8-15 parts of a curing accelerator; the epoxy nano silicon resin material is synthesized through in-situ liquid phase reaction of alkyl orthosilicate in epoxy Poss resin. According to the epoxy filling adhesive for semiconductor packaging, provided by the invention, the epoxy nano silicon resin material which is resistant to high temperature and aging and contains spherical nano silicon dioxide is adopted as a base material and is matched with the rheological additive and the dispersing agent, so that not only can the filling amount of the filler with a low linear expansion coefficient be increased, but also the viscosity of the filling adhesive can be greatly reduced; therefore, the material has excellent flowability, weather resistance and low thermal expansion coefficient.

The invention belongs to the field of automobiles, and particularly relates to a plastic-metal composite automobile tail door assembly and an automobile. The plastic-metal composite automobile tail door assembly comprises a tail door inner plate and a tail door outer plate; the tail door inner plate is made of light metal or light alloy; the tail door outer plate is made of plastic with a low linear expansion coefficient; the tail door inner plate and the tail door outer plate are connected through connecting glue in a gluing mode to form a cavity structure. Compared with the prior art, the problems that in the prior art, when an automobile tail door is made of a light alloy material, stamping is difficult, the cost is high, when the automobile tail door is made of a plastic material, the performance is poor, a large number of reinforcing structures and reinforcing pieces need to be arranged, and the lightweight effect is weakened are solved. According to the tail door assembly, the cavity structure is formed, light weight is guaranteed, meanwhile, reinforcement can be achieved through simple thickening, the mechanical performance of the tail door assembly can be improved through the formed cavity structure, and high-low-temperature deformation of products is reduced.

This application discloses a polypropylene composite material, its preparation method, and its application, relating to the field of polymer materials technology. This application provides a polypropylene composite material comprising the following components in parts by weight: 40-95 parts PP resin, 1-5 parts silica gel adsorbent, 1-5 parts carbon nanotubes, and 1-20 parts filler; wherein the pore size of the silica gel adsorbent is D1, and the outer diameter (D50) of the carbon nanotubes is D2, with 0 ≤ D1 - D2 ≤ 17 nm. This application provides a polypropylene composite material that, through the synergistic effect of the silica gel adsorbent and carbon nanotubes, solves the material emission problem and forms a physically cross-linked structure in the system to achieve a low linear expansion coefficient and excellent scratch resistance.

The invention discloses a thermal shock resistant composite coating on the inner wall of a cylindrical graphite base and a preparation method thereof.The thermal shock resistant composite coating is arranged on the inner wall of the cylindrical graphite base, and a nanocarbon / TiC composite transition layer, a Ta transition layer and a TaC protection layer are sequentially arranged on the inner side of the cylindrical graphite base from outside to inside; and the linear expansion coefficients of the nanocarbon / TiC composite transition layer, the Ta transition layer and the TaC protection layer are gradually reduced from outside to inside. The preparation method comprises the following steps: pretreating the inner surface of the cylindrical graphite matrix; generating a nanocarbon / TiC composite transition layer on the inner wall of the pretreated cylindrical graphite matrix through CVD co-deposition; a Ta transition layer is deposited on the inner wall of the nanocarbon / TiC composite transition layer through a double glow method; and preparing a TaC protective layer on the surface of the Ta transition layer by using a plasma spraying method. The obtained coating is stable in adhesive force under the action of thermal stress, free of layering and cracking, good in oxidation resistance, high in film-substrate binding force and good in thermal shock resistance.

The present disclosure provides a thermosetting resin composition which, when the thermosetting resin composition and a semi-cured product thereof are heated, exhibits a property of first maintaining a low melt viscosity state and then rapidly becoming curable, which improves the storage stability of the thermosetting resin composition and the semi-cured product thereof, and reduces an increase in a linear expansion coefficient and suppresses a decrease in a glass transition temperature of a cured product, which is often associated with heating. The thermosetting resin composition contains a radically polymerizable unsaturated compound and an organic radical compound.

An object of the present invention is to provide a polymer film having a small anisotropy of linear expansion factor. Another object of the present invention is to provide a substrate for communication including the polymer film.The polymer film of the present invention is a polymer film including a liquid crystal polymer, in which, in a case of observing a surface of the polymer film under a crossed nicol environment with a polarization microscope, a plurality of bright portions are observed in an observation region, and in the plurality of bright portions, an equivalent circle diameter of a bright portion having a maximum equivalent circle diameter is 10 μm or less.

The present application relates to the technical field of plate performance testing, and particularly relates to a kind of plate edge durability test method;It comprises the following steps: cutting plate sample into standard size test piece;Using thermal mechanical analyzer respectively test the linear expansion coefficient of test piece edge material and base material;The test piece after processing is placed in environmental test chamber and is subjected to cyclic test;Test piece is fixed on load testing device, and constant load is applied along the direction perpendicular to the edge interface of plate plane;Using flatness tester to measure the overall warping of test piece, compare with the warping data before testing, calculate the warping change, evaluate the actual effect of plate balanced laminating process on preventing warping after edge sealing;Using weighted scoring method to calculate the comprehensive score of edge durability;Realize that the long-term durability of plate edge sealing under complex working conditions can be comprehensively and accurately evaluated, and provide scientific and comprehensive technical support for edge sealing process optimization, material selection and structure design.

The embodiment of the present application provides an optical lens for temperature drift compensation and a manufacturing method thereof. The optical lens comprises: a lens body having a first linear expansion coefficient A; and a compensation element located in the lens body and having a second linear expansion coefficient B; wherein, based on a preset temperature gradient AT, a preset back focus offset AD of the lens body under the preset temperature gradient AT, a preset compensation amount AX of the lens body under the preset temperature gradient AT, the first linear expansion coefficient A and the second linear expansion coefficient B satisfy the following rules: when AT>0, if AD>0 and AX<0, then B<A; if AD>0 and AX>0, then B>A; if AD<0 and AX<0, then B>A; if AD<0 and AX>0, then B<A; when AT<0, if AD>0 and AX<0, then B>A; if AD>0 and AX>0, then B<A; if AD<0 and AX<0, then B>A; and if AD<0 and AX>0, then B

This method for manufacturing a semiconductor package includes: preparing a connection body provided with a plurality of semiconductor chip components and a semiconductor wafer substrate that has a wafer body and a plurality of first electrodes; forming an underfill; forming a sealing layer for collectively sealing the plurality of semiconductor chip components, thereby forming a sealing body; and forming individual pieces from the sealing body to obtain a plurality of semiconductor components. The plurality of first electrodes are arranged on the wafer body at a minimum pitch of 40 μm or less. The underfill is a cured product of an underfill material, and the sealing layer is a cured product of a sealing material. The linear expansion coefficient of the cured product of the underfill material is 6-30 ppm / C°, and the linear expansion coefficient of the cured product of the sealing material is 5-20 ppm / C°. The flexural modulus of the cured product of the sealing material is 5.0-20 GPa at 25°C.

This invention discloses a silicone foam sheet and a battery module and battery pack containing the same, belonging to the technical field of silicone foam materials. The linear expansion coefficient α of the foam sheet's pore diameter satisfies 1≤α≤8, and the linear contraction coefficient β of the foam sheet's pore wall thickness satisfies 4≤β≤9. This invention enables the silicone foam sheet to have more spatial gaps and a lower thermal conductivity under room temperature conditions; it also enables the silicone foam sheet to maintain an intact pore structure and high strength after sintering at high temperatures, thus preventing breakage. Therefore, the silicone foam sheet of this invention has good thermal insulation performance; simultaneously, the silicone foam sheet of this invention also exhibits good cushioning performance.

The invention provides a modified polypropylene material with a low linear expansion coefficient for an automobile and a preparation method of the modified polypropylene material, and belongs to the technical field of high polymer materials. The material is prepared from the following components in parts by weight: 60 to 80 parts of polypropylene resin, 5 to 20 parts of short glass fiber, 5 to 30 parts of flaky inorganic filler, 5 to 10 parts of elastomer flexibilizer, 2 to 5 parts of compatilizer, 1 to 2 parts of interfacial compatilizer and 0.2 to 0.5 part of antioxidant. On the basis of a flaky filler, short glass fiber and elastomer ternary synergistic system, a micro-nano lamination technology is introduced, and the micro-phase form of the material is reconstructed through an integrated process of pretreatment, premixing, layered melting, micro-nano lamination and cooling granulation, so that the flaky filler forms a two-dimensional barrier, the short glass fiber constructs a three-dimensional skeleton, and the three-dimensional structure is formed. The micro-nano layered structure reinforces the molecular chain constraint, and the three cooperate to further reduce the linear expansion coefficient; meanwhile, through the synergistic effect of the compatilizer and the interface compatilizer, the excellent rigid-tough balance of the material is ensured.

The application relates to the technical field of automobile exterior materials, in particular to a preparation method of a low-linear-expansion-coefficient modified PP composite material for automobile exterior decoration, which is composed of the following components in parts by weight: 65-75 parts of homopolymerization and copolymerization compounded polypropylene, 22-28 parts of a composite modified inorganic filler composed of talcum powder and short glass fiber which are synergistically modified by a double silane coupling agent and adipic acid, and 4-6 parts of a MAH-g-PP and EMA-GMA compounded compatilizer. The composite modified inorganic filler and the nano auxiliary filler compounded system are adopted in the application, and a special filler surface treatment process is matched, so that the combination strength of the filler and the resin matrix is remarkably improved, the synergistic effect of the filler is fully exerted, the linear expansion coefficient of the material is effectively reduced, and the size stability of the automobile exterior decoration part during long-term use is ensured.

The invention discloses a method for preventing a tundish stopper from being broken, which relates to the technical field of continuous casting and comprises the following steps: controlling the length of the stopper to be within a first threshold range; the shape of the stopper rod head is adjusted, so that the flow control precision of the stopper rod is within a second threshold range; the installation time of the stopper rod is controlled to be before baking of the tundish; and the stopper rod is controlled to be in a closed state when the tundish begins to be baked, and the stopper rod is opened after the tundish is baked for half an hour. The SiC micro powder is introduced into production ingredients of the tundish stopper rod, and the stopper rod is subjected to composite structure design, so that the comprehensive mechanical property of the stopper rod is improved, and the linear expansion coefficient is reduced; meanwhile, the length of the stopper rod and the shape of the stopper rod head are optimized, so that the situation that the rod body is fractured after being stressed due to transverse acting force generated by flowing of molten steel is avoided, and the flow control precision of the stopper rod is improved; in addition, the installation mode and the baking system of the stopper rod and the operation of the stopper rod in the casting and steel casting process are optimized, and the tundish stopper rod is effectively prevented from being broken.

The present disclosure provides a liquid resin composition with which it is possible to achieve high photo-curability and a reduction in the linear expansion coefficient of a cured product. The liquid resin composition contains a cationically polymerizable component (A), a photocationic polymerization initiator (B), and an inorganic filler (C). The cationically polymerizable component (A) includes a polyfunctional cationically polymerizable compound (A1) and a monofunctional cationically polymerizable compound (A2). The polyfunctional cationically polymerizable compound (A1) comprises at least one selected from the group consisting of a polyfunctional oxetane compound (A11) and a polyfunctional alicyclic epoxy compound (A12).