INVÓLUCRO DE COMPÓSITO DE RESINA CERÂMICA, MÉTODO DE PREPARAÇÃO DE UM INVÓLUCRO DE COMPÓSITO DE RESINA CERÂMICA E TERMINAL

Abstract

CERAMIC RESIN COMPOSITE SHELL, METHOD OF PREPARING THE SAME, AND TERMINAL. Embodiments of the present invention provide a ceramic resin composite shell, including a ceramic member and a resin member that is molded into the ceramic member by injection molding. A surface of the ceramic member that is bonded to the resin member includes a plurality of long strip-shaped holes extending from the surface into the interior of the ceramic member. The long strip-shaped holes have an open-hole structure. The pore sizes of the long strip-shaped holes range from 700 nm to 500 µm, and the lengths of at least some of the long strip-shaped holes are greater than 100 µm and less than or equal to 1000 µm. The long strip-shaped holes are filled with a resin material that constitutes the resin member.The composite casing has a ceramic texture and appearance and a fine internal structure formed by resin; the ceramic and resin are strongly bonded, and the bond strength is high. The embodiments of the present invention further provide a method for preparing the ceramic resin composite casing and a terminal including the composite casing.

Description

Ceramic resin composite enclosure, method for preparing a ceramic resin composite enclosure. AND TERMINAL

[001] This application claims priority to Chinese Patent Application No. 201911424962.9, filed in The National Intellectual Property Administration of China, as of December 30, 2019, and entitled CERAMIC RESIN COMPOSITE HOUSING, PREPARATION METHOD THEREOF, AND TERMINAL, is incorporated herein by reference in its entirety. Technical Field

[002] The embodiments of the present invention relate to the field of terminal housing technologies and, in particular, to a ceramic resin composite housing, a method for preparing the same, and a terminal. Foundation

[003] Ceramic material has good mechanical and electrical properties and a warm, jade-like texture. When used in a terminal device housing, ceramic material can improve product performance and user experience. However, processing ceramic material and molding a fine structure are difficult, resulting in a low yield rate and high costs. Resin has the advantages of good overall mechanical properties and easy molding, which facilitates fine structure molding and offers considerable design freedom. Furthermore, resin material has low density and good weight reduction function when used to mold a smart terminal housing. For comprehensive use Petition 870230106899, dated 04 / 12 / 2023, page 9 / 44 2 / 30 of the advantages of both materials, ceramic and resin materials are used to form composites in industry. However, ceramic and resin materials differ greatly in their physical and chemical properties. Consequently, it is difficult to obtain a strong bond at the micro level, and the bond strength of the interface between the ceramic and resin materials is not high. Summary

[004] In view of this, embodiments of the present invention provide a ceramic resin composite housing to solve an existing problem of low bond strength between ceramic and resin to some extent.

[005] Specifically, a first aspect of the embodiments of the present invention provides a ceramic composite resin shell, including a ceramic member and a resin member that is molded into the ceramic member by injection molding. A surface of the ceramic member that is bonded to the resin member includes a plurality of long strip-shaped holes extending from the surface into the interior of the ceramic member. The long strip-shaped holes have an open-hole structure. The pore sizes of the long strip-shaped holes range from 700 nm to 500 µm, and the lengths of at least some of the long strip-shaped holes are greater than 100 µm and less than or equal to 1000 µm. The long strip-shaped holes are filled with a resin material that constitutes the resin member.

[006] In an implementation of the present invention, the Petition 870230106899, dated 04 / 12 / 2023, page 10 / 44 3 / 30 long strip-shaped holes are formed by loss-on-ignition of organic fibers, and the long strip-shaped holes extend sinuously from the surface of the ceramic member to the inner part of the ceramic member.

[007] In one implementation of the present invention, the pore sizes at all positions of the long strip-shaped holes are the same or basically the same.

[008] In one implementation of the present invention, the pore sizes of the long strip-shaped holes gradually increase as the long strip-shaped holes extend from the surface of the ceramic member to the inner part of the ceramic member.

[009] In one implementation of the present invention, the pore sizes of the long strip-shaped holes gradually decrease as the long strip-shaped holes extend from the surface of the ceramic member to the inner part of the ceramic member.

[0010] In one implementation of the present invention, the volume ratio of the plurality of long strip-shaped holes in the ceramic member is 1% to 35%.

[0011] In one implementation of the present invention, the area ratio of the plurality of long strip-shaped holes on the surface of the ceramic member that is bonded to the resin member varies from 1% to 60%.

[0012] In one implementation of the present invention, the pore sizes of some or all of the long strip-shaped holes range from 15 µm to 500 µm.

[0013] In one implementation of the present invention, the plurality of holes in the form of a long strip is Petition 870230106899, dated 04 / 12 / 2023, page 11 / 44 4 / 30 uniformly distributed on the surface of the ceramic member that is bonded to the resin member.

[0014] In one implementation of the present invention, the surface of the ceramic member that is bonded to the resin member further includes a plurality of non-long strip-shaped holes, wherein the non-long strip-shaped holes are filled with the resin material that constitutes the resin member.

[0015] In one implementation of the present invention, a ceramic member material includes one or more of an oxide ceramic material, a nitride ceramic material, and a carbide ceramic material.

[0016] In one implementation of the present invention, a resin member material is thermoplastic resin.

[0017] In one implementation of the present invention, the resin member further includes a reinforcing component, wherein the reinforcing component includes one or more glass fibers, carbon fibers, glass flakes, calcium carbonate, magnesium carbonate, silica, and talc.

[0018] In one implementation of the present invention, the resin member may be of an integrated structure or may include a plurality of separate structures attached to the surface of the ceramic member.

[0019] The ceramic resin composite housing provided in the first aspect of the embodiments of the present invention includes the ceramic member and the resin member, which are composited in an integrated structure, wherein the ceramic member includes long strip-shaped holes at the micron and / or submicron level extending from the surface to the interior, and a portion of the Petition 870230106899, dated 04 / 12 / 2023, page 12 / 44 5 / 30 resin material infiltrates the holes in a long strip shape, so that a strong bond at the micron level is formed at the bonding interface between the ceramic and resin members, and a high bond strength is achieved. The resin material that infiltrates the ceramic member also hardens the ceramic member. Furthermore, the long strip-shaped holes have small pore sizes. Therefore, the integrity of the ceramic is not significantly damaged, and the mechanical properties of the ceramic substrate are less weakened.

[0020] According to a second aspect, the embodiments of the present invention further provide a method for preparing a ceramic resin composite housing including: To prepare a ceramic member with a predefined shape using organic fibers as a pore-forming agent, wherein a surface of the ceramic member on which injection molding is pre-executed includes a plurality of long strip-shaped holes extending from the surface into the interior of the ceramic member, the long strip-shaped holes are formed by loss-on-ignition of the organic fibers, the long strip-shaped holes have an open-hole structure, pore sizes of the long strip-shaped holes range from 700 nm to 500 µm, and the lengths of at least some of the long strip-shaped holes are greater than 100 µm and less than or equal to 1000 µm; Perform impregnation on the ceramic member using an aqueous solution that includes a nitrogen compound to allow the aqueous solution containing the nitrogen compound to enter the holes in a long strip shape and, Petition 870230106899, dated 04 / 12 / 2023, page 13 / 44 6 / 30 Next, perform drying to fix a layer of the nitrogen compound to the inner walls of the holes in a long strip shape; and perform injection molding on the dry ceramic member, allowing a resin liquid to enter the holes in a long strip shape to have an exothermic reaction with the nitrogen compound, and perform fine structure processing on a resin piece after injection molding is completed, to obtain a ceramic resin composite shell.

[0021] In one implementation of the present invention, the nitrogen compound includes one or more ammonia compounds, a hydrazine compound and its derivative, and a water-soluble amine.

[0022] In one implementation of the present invention, a specific method for preparing a ceramic member with a predefined shape using organic fibers as a pore-forming agent includes one or more of an injection molding method, a tape casting method, a 3D printing method, a hot pressing method, and a fluid paste immersion and sanding method.

[0023] In one implementation of the present invention, the preparation of a ceramic member with a predefined shape using organic fibers as a pore-forming agent includes: mixing ceramic powder, organic fibers and a bonding agent to prepare a green body of the ceramic member, and sintering the green body of the ceramic member to obtain the ceramic member.

[0024] In one implementation of the present invention, the organic fiber includes at least one artificial fiber and one Petition 870230106899, dated 04 / 12 / 2023, page 14 / 44 7 / 30 natural fiber in which loss on ignition may occur.

[0025] In one implementation of the present invention, the impregnation process is carried out under vacuum conditions.

[0026] In one implementation of the present invention, ultrasonic vibration is performed in the impregnation process.

[0027] In one implementation of the present invention, one form of drying is air drying or freeze-drying, and a temperature for air drying ranges from 10 °C to 80 °C.

[0028] The preparation method provided in the second aspect of the embodiments of the present invention implements a firm bond between ceramic and resin under the dual effects of physical incorporation and a chemical reaction. On the one hand, long strip-shaped holes extending into the ceramic member are prepared by loss-of-ignition of organic fibers, and resin infiltrates the long strip-shaped holes to enhance the bonding of the resin and ceramic. On the other hand, the nitrogen compound is fixed to the inner walls of the long strip-shaped holes by impregnation; and in the injection molding process, the nitrogen compound has an exothermic reaction with the resin that infiltrates the holes, to provide heat to maintain a leading end of a liquid resin flow continuously in a low viscosity flow state.In this way, the resin infiltrates the orifices in a smooth, long strip shape, and the following problem is avoided: The resin cannot infiltrate the orifices smoothly due to an increase in the viscosity of the leading end of the liquid resin flow due to cooling. Furthermore, in the present embodiments... Petition 870230106899, dated 04 / 12 / 2023, page 15 / 44 8 / 30 invention, the holes are formed through the loss on ignition of the organic fibers. The integrity of a ceramic structure is not significantly damaged, and a strong acid and a strong alkali are not required. The loss on ignition of the organic fibers is completed in the ceramic sintering process, which is environmentally friendly and energy-saving.

[0029] The embodiments of the present invention further provide a terminal, including the ceramic resin composite housing according to the first aspect of the embodiments of the present invention. The ceramic resin composite housing can serve as a housing structure, such as a front cover, an intermediate frame or a rear cover of the terminal. The terminal housing provided in the embodiments of the present invention has both a ceramic texture and appearance and a thin internal structure formed by resin, thus improving market competitiveness.

[0030] The embodiments of the present invention further provide a mobile phone, including a display, a housing mounted on an outer side of the mobile phone, and a main board and a battery that are located inside the housing. All or part of the housing is a ceramic resin composite housing according to any implementation of the first aspect of the embodiments of the present invention.

[0031] In one implementation of the present invention, the housing includes a rear cover mounted on the back of the mobile phone. Alternatively, the housing includes a front cover mounted on the front side of the mobile phone. Alternatively, the housing includes an intermediate frame mounted on the mobile phone. Alternatively, Petition 870230106899, dated 04 / 12 / 2023, page 16 / 44 9 / 30 The enclosure includes one or more back covers, a front cover, and a mid-frame.

[0032] The intermediate frame is located between the front cover and the back cover of the cell phone. Alternatively, the intermediate frame is located between the display and the back cover of the cell phone.

[0033] In one implementation of the present invention, the back cover and the intermediate frame are of an integrated structure or of separate structures.

[0034] In one implementation of the present invention, the back cover is a ceramic resin composite housing, wherein a ceramic member forms a main appearance body of the mobile phone back cover, and has the appearance and texture of ceramic, and a resin member forms functional structures of a back cover frame and an inner side of the back cover. Therefore, the back cover has the texture and appearance of ceramic and a fine internal functional structure. Brief Description of the Drawings

[0035] Figure 1 is a schematic structural diagram of a cellular phone 100 according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a mobile phone housing 11 according to an embodiment of the present invention; Figure 3 is a schematic structural diagram of a ceramic resin composite housing according to an embodiment of the present invention; Figure 4A and Figure 4B are partial schematic structural diagrams of a frontal surface and a Petition 870230106899, dated 04 / 12 / 2023, page 17 / 44 10 / 30 rear surface of a cell phone back cover, respectively, according to one embodiment of the present invention; Figure 5 is a schematic structural diagram of a ceramic member prepared in step S101 of a preparation method according to an embodiment of the present invention; and Figure 6 is a schematic diagram of the ceramic and resin composition in an injection molding process in step S102 of a preparation method according to an embodiment of the present invention. Description of Modalities

[0036] The following describes embodiments of the present invention with reference to the accompanying drawings in embodiments of the present invention.

[0037] The embodiments of the present invention provide a ceramic resin composite housing that can be applied to a terminal housing, such that the terminal housing has the appearance and texture of ceramic and a fine internal structure formed of resin, thereby improving the market competitiveness of a terminal product. The terminal can be a mobile phone or an electronic product, such as a tablet, a notebook, a laptop, or a smart wearable product. A portion of the terminal housing or the entire terminal housing can be the ceramic resin composite housing provided in the embodiments of the present invention. The terminal housing is an external structural member that is configured to protect the internal components of the terminal and can be directly seen and touched by a user. Petition 870230106899, dated 04 / 12 / 2023, page 18 / 44 11 / 30

[0038] A 100 mobile phone is used as an example. AFigure 1 is a schematic structural diagram of a cellular phone 100 according to one embodiment of the present invention. The cellular phone 100 includes an enclosure 11 mounted on an outer side of the cellular phone 100, and components such as a main board and a battery that are located inside the enclosure 11. As shown in Figure 2, the enclosure 11 may specifically include a front cover 12 mounted on a front side (i.e., the display side) of the cellular phone 100, or it may include a rear cover 13 mounted on a rear side of the cellular phone 100. In some implementations of the present invention, the enclosure 11 may further include an intermediate frame 14 located between the front cover 12 and the rear cover 13, and the intermediate frame 14 is configured to support components such as the main board and the battery.In one implementation of the present invention, the front cover 12, the back cover 13 and / or the intermediate frame 14 are / are integrally the ceramic resin composite housing provided in the embodiments of the present invention, or a part of the front cover 12, the back cover 13 and / or the intermediate frame 14 is the ceramic resin composite housing. For example, a part of the back cover 13 or a part of the front cover 12 or the intermediate frame 14 is the ceramic resin composite housing. In some implementations of the present invention, the back cover 13 and the intermediate frame 14 may be an integrated structure. In some other implementations of the present invention, the back cover 13 and the intermediate frame 14 may alternatively be separate structures. The phone. Petition 870230106899, dated 04 / 12 / 2023, page 19 / 44 12 / 30 cell phone 100 also includes a display. In a bezel-less cell phone, a casing usually does not include a front cover, and an intermediate frame is located between the display and the back cover 13. Alternatively, in some bezel-less cell phones, a casing may not include an exposed intermediate frame.

[0039] As shown in Figure 3, a ceramic resin composite housing 10 provided in embodiments of the present invention includes a ceramic member 101 and a resin member 102 that is molded onto the ceramic member 101 by injection molding. A surface of the ceramic member 101 that is bonded to the resin member 102 includes a plurality of long strip holes 103 extending from the surface of the ceramic member 101 into the inner part of the ceramic member 101. The long strip holes 103 have an open hole structure. The pore sizes of the long strip holes 103 range from 700 nm to 500 µm. The lengths of at least some of the long strip holes 103 are greater than 100 µm and less than or equal to 1000 µm. The long strip-shaped holes 103 are filled with a resin material that constitutes the resin member 102.

[0040] In the ceramic resin composite shell 10 provided in embodiments of the present invention, the integrated molding of ceramic and resin can be accomplished using a mature injection molding process, and the composite shell has the appearance and texture of ceramic and also has a fine structure formed by the resin material. The ceramic member 101 includes the holes in the form of a long strip. Petition 870230106899, dated 04 / 12 / 2023, page 20 / 44 13 / 30 at the micron and / or submicron level 103 extending from the surface to the interior, and the resin material infiltrates the holes in a long strip shape 103, so that a firm bond at the micron level is formed at the bonding interface between the ceramic member 101 and the resin member, and a high bond strength. Furthermore, the resin material infiltrating the ceramic member 101 also has a similar fiber-hardening effect on the ceramic member 101, and the interface energy required to crack the ceramic member 101 is improved through a pull-out effect. Therefore, compared to a pure ceramic substrate, the ceramic resin composite shell in the embodiments of the present invention has better toughness and is less likely to be damaged under impact load, such as a drop.The long strip-shaped holes 103 in embodiments of the present invention do not significantly damage the integrity of the ceramic, and a mechanical property of a ceramic substrate is less weakened. Furthermore, compared to the pure ceramic substrate, the ceramic resin composite shell 10 in embodiments of the present invention has a lower density, which is beneficial for reducing the weight of a terminal device.

[0041] In one implementation of the present invention, long strip-shaped holes 103 are formed by loss on ignition of organic fibers. The long strip-shaped fiber-like holes extending from the surface of the ceramic member 101 to the inner part of the ceramic member 101 are formed in the member of Petition 870230106899, dated 04 / 12 / 2023, page 21 / 44 14 / 30 ceramic 101 using a fiber loss-on-ignition method. In a macroscopic view, the long strip-shaped hole 103 can form a recessed structure and its traction effect with glue is better than that of a granular hole. Therefore, the bond strength between the ceramic and the resin can be improved. In a microscopic view, the long strip-shaped holes 103 can activate and connect to internal closed holes of the ceramic member 101, the holes are filled with resin material (as shown in Figure 3) after injection molding, and there is a removal effect in the damage process, further improving the bond strength.

[0042] In one implementation of the present invention, long strip-shaped holes 103 extend sinuously from the surface of the ceramic member 101 to the inner part of the ceramic member 101. The resin material infiltrates the long strip-shaped holes 103 that extend sinuously, which is more beneficial for improving the interface bond strength between the ceramic and the resin through the stripping effect.

[0043] In one implementation of the present invention, the long strip-shaped hole 103 has an open hole structure, wherein an open end of the long strip-shaped hole 103 is located on the surface of the ceramic member 101 and is connected to the resin member 102, and a closed end of the long strip-shaped hole 103 is located within the ceramic member 101. The resin material can enter the long strip-shaped hole 103 from the open end. In one implementation of the present invention, holes in Petition 870230106899, dated 04 / 12 / 2023, p. 22 / 44 15 / 30 long strip-shaped holes 103 are formed through loss on ignition of organic fibers. Therefore, the pore size of the hole in long strip-shaped holes 103 is determined by the thickness of the organic fiber, and the pore size is easy to control. In one implementation of the present invention, the pore sizes of the plurality of holes in long strip-shaped holes 103 may be the same or may be different.

[0044] In one implementation of the present invention, the pore sizes at all positions of the long strip-shaped holes 103 may be the same or essentially the same; or the pore sizes of the long strip-shaped holes 103 gradually increase as the long strip-shaped holes 103 extend from the surface of the ceramic member 101 to the inner part of the ceramic member 101; or the pore sizes of the long strip-shaped holes 103 gradually decrease as the long strip-shaped holes 103 extend from the surface of the ceramic member 101 to the inner part of the ceramic member 101. The pore sizes at all positions are the same or essentially the same, which facilitates preparation.Pore ​​sizes gradually increase as the long strip-shaped holes 103 extend from the surface of the ceramic member 101 to the interior of the ceramic member 101, which helps to form better recessed structures and improve bond strength. Pore sizes gradually decrease as the long strip-shaped holes 103 extend from the surface of the ceramic member 101 to the interior of the member. Petition 870230106899, dated 04 / 12 / 2023, p. 23 / 44 16 / 30 ceramic 101, which facilitates the infiltration of the resin material, so that the resin smoothly fills the holes. In one embodiment of the present invention, the three previous forms of long strip-shaped holes 103 may exist simultaneously, or only one or two of the three previous forms may exist. Certainly, in some other implementations of the present invention, it may also be that the pore sizes of the long strip-shaped holes 103 change irregularly as the long strip-shaped holes 103 extend from the surface of the ceramic member 101 to the inner part of the ceramic member 101.

[0045] In one implementation of the present invention, to allow the resin material to better infiltrate the long strip-shaped holes 103, the pore sizes of some or all of the long strip-shaped holes 103 range from 15 µm to 500 µm.

[0046] In one implementation of the present invention, to ensure that the ceramic has a higher strength, a volume ratio of the plurality of long strip-shaped holes 103 in the ceramic member 101 is from 1% to 35%. Furthermore, the volume ratio of the plurality of long strip-shaped holes 103 in the ceramic member 101 can be controlled to be between 10% and 25%. An appropriate volume ratio of the long strip-shaped holes 103 can ensure a high bond strength between the ceramic and the resin and allow the body of the ceramic member 101 to have high strength.

[0047] In one implementation of the present invention, to ensure a firm bond between the ceramic and the resin, a Petition 870230106899, dated 04 / 12 / 2023, page 24 / 44 The 17 / 30 area ratio of the plurality of long strip holes 103 on the surface of the ceramic member 101 that is bonded to the resin member varies from 1% to 60%. Furthermore, the area ratio of the plurality of long strip holes 103 can vary from 10% to 30%. An appropriate area ratio of long strip holes 103 can ensure high bond strength between the ceramic and the resin.

[0048] In one implementation of the present invention, to form a better bond between the ceramic and the resin, the plurality of long strip-shaped holes 103 are uniformly distributed on the surface of the ceramic member 101 that is bonded to the resin member.

[0049] In one implementation of the present invention, because long strip-shaped holes 103 are formed through loss on ignition of the organic fibers, a small number of long strip-shaped holes 103 having a closed-hole structure may also exist within the ceramic member 101 due to a fiber distribution problem. That is, when some fibers are distributed only on the inside of the ceramic and do not extend to the surface of the ceramic, long strip-shaped holes 103 having a closed-hole structure are formed within the ceramic after loss on ignition of the organic fibers. A closed hole refers to a cavity and a pore channel in a porous solid that are not connected to the outside, and an open hole refers to a cavity and a pore channel in a porous solid that are connected to the outside.

[0050] In one implementation of the present invention, the Petition 870230106899, dated 04 / 12 / 2023, p. 25 / 44 The surface and inner part of the ceramic member 101 may also include a plurality of non-long strip-shaped holes 104. These non-long strip-shaped holes 104 are not formed by fiber loss on ignition, but are inevitably generated due to a raw material or other reason in a ceramic firing process. The shapes of the non-long strip-shaped holes 104 are not limited and may be regular or irregular shapes. For example, the non-long strip-shaped holes 104 may be spherical or nearly spherical, and the pore sizes of the non-long strip-shaped holes 104 are mainly at the micron and / or submicron level.Some of these non-long strip-shaped holes 104 are distributed on the surface of the ceramic member 101 and have an open hole structure, and some of these non-long strip-shaped holes 104 are distributed within the ceramic member 101 and have a closed hole structure. As shown in Figure 3, the long strip-shaped holes 103 having the open hole structure can activate and connect to some of the closed non-long strip-shaped holes 104 within the ceramic member 101, so that the closed non-long strip-shaped holes 104 are also filled with resin material after injection molding, further improving bond strength.

[0051] In one implementation of the present invention, to ensure the strength of the ceramic, the total volume ratio of multiple holes within the ceramic member 101 is controlled not to exceed 40%. Furthermore, the total volume ratio of multiple holes within the member of Petition 870230106899, dated 04 / 12 / 2023, page 26 / 44 The 19 / 30 ceramic 101 component is controlled to not exceed 30%. Furthermore, the total volume ratio of various orifices within the ceramic 101 member cannot exceed 25%.

[0052] In one implementation of the present invention, a ceramic member material 101 includes one or more of an oxide ceramic material, a nitride ceramic material, and a carbide ceramic material. Specifically, the oxide ceramic material may be, for example, one or more of alumina, zirconia, silicon oxide, and kaolin; the nitride ceramic material may be, for example, one or more of silicon nitride and boron nitride; and the carbide ceramic material may be, for example, silicon carbide. In one implementation of the present invention, the ceramic member 101 may be a flat ceramic plate with a thickness of 0.25 mm to 0.7 mm.

[0053] In one implementation of the present invention, a resin member material is thermoplastic resin. The resin material can be bonded to the ceramic member 101 through a mature injection molding process, which facilitates the molding of a complex and thin structure, has a comparatively high degree of freedom in structural design, and offers convenient processing and low cost. Specifically, the thermoplastic resin can be one or more polyester resin and polyamide resin, and specifically, the polyamide resin can be aliphatic polyamide resin, aromatic polyamide resin, or a mixture of aliphatic polyamide resin and aromatic polyamide resin.

[0054] In one implementation of the present invention, to optimize a mechanical property of the resin member, the Petition 870230106899, dated 04 / 12 / 2023, p. 27 / 44 20 / 30 resin member may further include a reinforcing component, where the reinforcing component may include one or more of glass fibers, carbon fibers, glass flakes, calcium carbonate, magnesium carbonate, silica and talc.

[0055] In one implementation of the present invention, the specific shapes and structures of the ceramic member 101 and the resin member are not limited, and the ceramic member 101 and the resin member can be molded according to an actual product requirement. The resin member can be of an integrated structure or can include a plurality of separate structures bonded to the surface of the ceramic member 101.

[0056] Figure 4A and Figure 4B are schematic structural diagrams of a back cover 15 of a mobile phone 100 according to a specific embodiment of the present invention. The back cover 15 has both a hot, jade-type ceramic member 151 and a resin member 152 that has a fine structure. In this embodiment, the ceramic member 151 forms a main appearance body of the mobile phone back cover 15 and has a ceramic appearance and texture; and the resin member 152 forms functional structures of a frame of the back cover 15 and an inner side of the back cover 15, which facilitates fine processing. In daily use, the ceramic member is less exposed to direct impact, reducing the likelihood of damage. Furthermore, a micron-level and / or submicron-level bond is implemented on a surface between the ceramic member 151 and the resin member 152, and a bond strength is high.In addition, resin that seeps into ceramic member 151 may also have an effect. Petition 870230106899, dated 04 / 12 / 2023, p. 28 / 44 21 / 30 fiber hardening, which further optimizes the composite housing's resistance to impacts and damage.

[0057] The ceramic resin composite shell provided in embodiments of the present invention includes the ceramic member and the resin member, which are composited in an integrated structure, wherein the ceramic member includes micron- and / or submicron-level long strip-shaped holes 103 extending from the surface to the interior, and the resin material partially infiltrates the long strip-shaped holes 103, so that a firm micron-level bond is formed at the bonding interface between the ceramic member and the resin member, and a high bond strength is achieved. The resin material infiltrating the ceramic member also hardens the ceramic member. Furthermore, the long strip-shaped holes 103 have small pore sizes. Therefore, the integrity of the ceramic is not significantly damaged, and a mechanical property of a ceramic substrate is less weakened.

[0058] Correspondingly, an embodiment of the present invention further provides a method for preparing a ceramic resin composite housing including the following steps.

[0059] S101: Prepare a ceramic member with a predefined shape using organic fibers as a pore-forming agent, wherein a surface of the ceramic member on which injection molding is pre-executed includes a plurality of long strip-shaped holes 103 extending from the surface into the interior of the ceramic member, the holes in the shape of Petition 870230106899, dated 04 / 12 / 2023, page 29 / 44 22 / 30 long strip 103 holes are formed by loss on ignition of organic fibers, the long strip 103 holes have an open hole structure, pore sizes of the long strip 103 holes range from 700 nm to 500 pm, and the lengths of at least some of the long strip 103 holes are greater than 100 pm and less than or equal to 1000 pm. Figure 5 is a schematic structural diagram of a ceramic member including long strip 103 holes, where 103 is the long strip 103 hole having the open hole structure.

[0060] S102: Perform impregnation on the ceramic member using an aqueous solution that includes a nitrogen compound to allow the aqueous solution containing the nitrogen compound to enter the long strip-shaped holes 103 and then perform drying to fix a layer of the nitrogen compound to the inner walls of the long strip-shaped holes 103.

[0061] S103: Perform injection molding on the dry ceramic member, allow a resin liquid to enter the orifices in the form of a long strip 103 to have an exothermic reaction with the nitrogen compound, and perform fine structure processing on a resin part after injection molding is completed, to obtain a ceramic resin composite shell. Figure 6 is a schematic diagram of ceramic and resin composition in an injection molding process, where 105 is a channel through which the resin liquid flows in the injection molding process.

[0062] In one implementation of the present invention, in step S101, an artificial fiber and / or a natural fiber in which loss on ignition can be achieved can be Petition 870230106899, dated 04 / 12 / 2023, pages 30 / 44 23 / 30 selected and used as the organic fiber. Specifically, for example, the organic fiber may be, but is not limited to, one or more of a nylon fiber, an explosion-proof fiber, and natural wood chips. The diameters of the organic fibers range from 700 nm to 500 µm, and the lengths of at least some of the organic fibers are greater than 100 µm and less than or equal to 1000 µm. The diameters and lengths of the organic fibers directly determine the sizes and pore lengths of the long strip-shaped holes 103 that are ultimately formed. The amount of added organic fibers is controlled to be between 0.1% by weight and 5% by weight. Adding an appropriate amount of organic fibers can not only form sufficient holes but also prevent excessive weakening of a ceramic substrate.The ceramic member is prepared using organic fibers as a pore-forming agent, and the sizes of the holes in the ceramic member are easy to control. The ceramic member does not include macroscopic holes, but instead includes a large number of long strip-shaped holes at the micron and / or submicron level 103 that lead to the interior of the ceramic substrate.

[0063] In one implementation of the present invention, a specific method for preparing the ceramic member with the predefined shape is not limited. The ceramic member with the predefined shape can be prepared using one or more of an injection molding method, a tape casting method, a 3D printing method, a hot pressing method, and a fluid paste immersion and sanding method, wherein a layer-by-layer fluid paste immersion method Petition 870230106899, dated 04 / 12 / 2023, pages 31 / 44 24 / 30 can better control the distribution of holes and regulate a gradient of hole distribution along a thickness direction of the ceramic member. In some implementations of the present invention, a high proportion of holes on the ceramic surface and a low proportion of holes within the ceramic may facilitate injection molding. Alternatively, in other implementations of the present invention, a high proportion of holes within the ceramic and a low proportion of holes on the ceramic surface may result in a stronger recessed structure. Specifically, the regulation can be performed according to the specific requirements of a product.

[0064] In this embodiment of the present invention, a specific preparation process for the ceramic member with the predefined shape may be as follows: mixing ceramic powder, organic fibers, and a bonding agent to prepare a green body of the ceramic member, and sintering the green body of the ceramic member to obtain the ceramic member. A particle size of the ceramic powder is between 0.1 µm and 100 µm. A type of ceramic powder may be one or more of an oxide ceramic material, a nitride ceramic material, and a carbide ceramic material. Specifically, the oxide ceramic material may be, for example, one or more of alumina, zirconia, silicon oxide, and kaolin (essentially a compound of aluminum oxide and silicon); the nitride ceramic material may be, for example, one or more of silicon nitride and boron nitride; and the carbide ceramic material may be, for example, silicon carbide. Petition 870230106899, dated 04 / 12 / 2023, pages 32 / 44 25 / 30 Silica sol, zirconium sol, water glass, zirconium diacetate, or similar materials can be selected and used as a bonding agent. After the preparation of the green body is complete, it can be roasted at 850°C–1550°C for 30 minutes to 24 hours and then cooled in a furnace to complete the preparation of the ceramic member. Certainly, there are various types of ceramics, and the roasting requirements of different ceramics vary greatly. Therefore, the roasting conditions described above are only common roasting parameters, and a special ceramic roasting parameter may not fall within the above range.

[0065] In this embodiment of the present invention, the ceramic member can be a flat ceramic plate with a thickness of 0.25 mm to 0.7 mm.

[0066] In a specific embodiment of the present invention, alumina powder with an average particle diameter of 2 µm is selected and used as the ceramic powder; 30% by weight of silica sol is selected and used as the binding agent; and nylon fibers with a diameter of 10 µm are selected and used as the organic fibers, wherein the lengths of at least some of the nylon fibers are greater than 100 µm and less than or equal to 200 µm, and the amount of nylon fibers added is 1.2% by weight. The ceramic member is a flat plate with a thickness of 0.7 mm.

[0067] In one implementation of the present invention, holes are formed within the ceramic in the form of loss-on-ignition of organic fibers; and the holes obtained can extend into the ceramic, not being limited to the surface of the ceramic, and can be distributed throughout the ceramic substrate, if necessary. Secondly, the method does not Petition 870230106899, dated 04 / 12 / 2023, pages 33 / 44 26 / 30 requires the use of various types of acids and alkalis and achieves a good environmental protection effect. Furthermore, the organic fiber loss-on-ignition process is implemented synchronously in the ceramic sintering process, which has a good energy-saving effect.

[0068] In one implementation of the present invention, the long strip-shaped holes 103 are open holes, the pore sizes of the long strip-shaped holes 103 range from 700 nm to 500 pm, and the lengths of at least some of the long strip-shaped holes 103 are greater than 100 pm and less than or equal to 1000 pm. The long strip-shaped holes 103 of specific lengths can extend better in the ceramic.

[0069] In one implementation of the present invention, in step S102, the nitrogen compound includes one or more ammonia compounds, a hydrazine compound and its derivative, and a water-soluble amine. The concentration of the aqueous solution containing the nitrogen compound can vary from 1% by weight to 35% by weight and, specifically, can be, for example, 5% by weight, 10% by weight, 20% by weight, 30% by weight, or 35% by weight. The impregnation duration can be from 2 minutes to 60 minutes, and the specific duration is determined based on the morphology of the holes in the ceramic member. Deeper holes and smaller pore sizes require a longer impregnation duration. For example, the impregnation duration can be 20 minutes, 30 minutes, 40 minutes, 50 minutes, or 60 minutes.

[0070] In one embodiment of the present invention, to allow the aqueous solution containing the nitrogen compound to enter the long strip-shaped holes 103 Petition 870230106899, dated 04 / 12 / 2023, pages 34 / 44 27 / 30 in a smoother manner and maintain full contact with the inner walls of the long strip-shaped orifices 103, a vacuum condition and / or auxiliary ultrasonic vibration treatment are used in the impregnation process. The ultrasonic treatment can also promote gas release from the long strip-shaped orifices 103 that have an open orifice structure, thus facilitating the entry of the aqueous solution containing the nitrogen compound into the orifices.

[0071] In one implementation of the present invention, one way to perform drying on the ceramic member obtained after impregnation may be air drying or freeze-drying, where the air drying temperature varies from 10 °C to 80 °C, the wind speed can vary from 3 m / s to 8 m / s, and the duration can vary from 10 hours to 24 hours. Controlling an appropriate temperature can reduce the loss of a nitrogen element. In a specific implementation of the present invention, side-blowing air drying can be used. The side-blowing wind speed is 5 m / s, and the duration is 24 hours. According to a hydromechanical principle, side-blowing achieves a better effect when deep holes are dried. A layer of the nitrogen compound is fixed to the inner walls of the holes after drying is performed.In the injection molding process, the nitrogen compound has an exothermic reaction with the resin to promote the infiltration of the resin liquid into the holes.

[0072] In one implementation of the present invention, in step S103, the dry ceramic member is placed in an injection molding mold for injection molding. A Petition 870230106899, dated 04 / 12 / 2023, pages 35 / 44 28 / 30 Injection molding material is thermoplastic resin. This type of resin can have an exothermic reaction between esters and amines, with the nitrogen compound on the inner walls of the holes. Specifically, the thermoplastic resin can be one or more polyester resins and polyamide resins, and specifically, the polyamide resin can be aliphatic polyamide resin, aromatic polyamide resin, or a mixture of aliphatic polyamide resin and aromatic polyamide resin. Specific injection molding parameters can be determined based on the type of raw resin material. Typically, an injection gate temperature ranges from 220°C to 400°C, and the mold temperature ranges from 180°C to 400°C. Additionally, the injection gate temperature ranges from 295°C to 320°C, and the mold temperature ranges from 230°C to 260°C.In an injection process, high-temperature molten resin with good fluidity enters the orifices in the form of a long strip 103 in the ceramic member under high pressure and undergoes an exothermic reaction between esters and amines with the nitrogen compound on the inner walls of the orifices. In this way, the temperature at the leading end of a liquid resin flow does not drop drastically, and the leading end can remain continuously in a lower viscosity state for a long time, to smoothly enter the orifices at the micron and / or submicron level on the ceramic surface and within the ceramic, and to form micron and / or submicron level embedding structures at an interface.

[0073] To optimize a mechanical property of the resin, a specific amount of a reinforcing component also Petition 870230106899, dated 04 / 12 / 2023, pages 36 / 44 29 / 30 can be added to the resin. The reinforcing component may include one or more of glass fibers, carbon fibers, glass flakes, calcium carbonate, magnesium carbonate, silica, and talc.

[0074] In a specific implementation of the present invention, 66% by weight of polybutylene terephthalate (PBT) and 34% by weight of glass fibers are selected and used as a resin member material. In the injection molding process, the injection gate temperature is 330 °C, and the mold temperature is 260 °C.

[0075] In one implementation of the present invention, after the injection molding process is completed, a machining method, such as CNC (Computer Numerical Control), can be used to perform fine structure processing on the resin part of the composite casing to obtain the target composite casing.

[0076] Certainly, the method of bonding ceramic and resin in the embodiments of the present invention can be further combined with another existing bonding method, for example, further combined with riveting and traction with macro-sized hole glue.

[0077] The preparation method provided in embodiments of the present invention implements a firm bond between the ceramic and the resin under the dual effects of physical incorporation and a chemical reaction. On the one hand, the long strip-shaped holes 103 extending into the ceramic member are prepared by loss on ignition of the organic fibers, and the resin infiltrates the long strip-shaped holes 103 to enhance the resin bond. Petition 870230106899, dated 04 / 12 / 2023, pp. 37 / 44 30 / 30 and ceramic. On the other hand, the holes are enriched with the nitrogen compound through impregnation; and in the injection molding process, the nitrogen compound has an exothermic reaction with the resin that infiltrates the holes, to provide heat to maintain the leading end of the liquid resin flow used for injection molding continuously in a low viscosity flow state. In this way, the resin infiltrates the holes in a long strip shape 103 smoothly and the following problem is solved to some extent: The resin cannot infiltrate smoothly into the holes due to an increase in the viscosity of the leading end of the liquid resin flow due to cooling. Furthermore, in embodiments of the present invention, the holes are formed through loss on ignition of the organic fibers. The integrity of a ceramic structure is not significantly damaged, and a strong acid and a strong alkali are not required.The loss on ignition of the organic fibers is completed in a ceramic sintering process, which is environmentally friendly and saves energy.

Claims

1. Ceramic resin composite shell (10), characterized in that it comprises a ceramic member (101) and a resin member (102) that is molded onto the ceramic member (101) by injection molding, wherein a surface of the ceramic member (101) and that is bonded to the resin member (102) comprises a plurality of long strip-shaped holes (103) extending from the surface into the inner part of the ceramic member (101); long strip-shaped holes (103) have an open hole structure; the pore sizes of the long strip-shaped holes (103) range from 700 nm to 500 µm, and the lengths of at least some of the long strip-shaped holes (103) are greater than 100 µm and less than or equal to 1000 µm; and the holes in the shape of a long strip (103) are filled with a resin material which constitutes the resin member (102).

2. Ceramic resin composite housing (10), according to claim 1, characterized in that the long strip-shaped holes (103) are formed by loss-on-ignition of organic fibers, and the long strip-shaped holes (103) extend sinuously from the surface of the ceramic member (101) to the inner part of the ceramic member (101).

3. Ceramic resin composite casing (10), according to claim 1 or 2, characterized in that the pore sizes in all positions of the long strip-shaped holes (103) are the same.

4. Ceramic resin composite shell (10), of Petition 870260052000, dated 05 / 29 / 2026, page 11 / 20 2 / 5 according to claim 1 or 2, characterized in that the pore sizes of the long strip-shaped holes (103) gradually increase as the long strip-shaped holes (103) extend from the surface of the ceramic member (101) to the inner part of the ceramic member (101).

5. Ceramic resin composite housing (10), according to claim 1 or 2, characterized in that the pore sizes of the long strip-shaped holes (103) gradually decrease as the long strip-shaped holes (103) extend from the surface of the ceramic member (101) to the inner part of the ceramic member (101).

6. Ceramic resin composite housing (10), according to any one of claims 1 to 5, characterized in that a volume proportion of the plurality of long strip-shaped holes (103) in the ceramic member (101) is from 1% to 35%.

7. Ceramic resin composite casing (10), according to any one of claims 1 to 6, characterized in that the area ratio of the plurality of long strip-shaped holes (103) on the surface that is of the ceramic member (101) and that is bonded to the resin member (102) varies from 1% to 60%.

8. Ceramic resin composite casing (10), according to any one of claims 1 to 7, characterized in that the plurality of long strip-shaped holes (103) are uniformly distributed on the surface of the ceramic member (101) and that it is bonded to the resin member (102). Petition 870260052000, dated 05 / 29 / 2026, page 12 / 20 3 / 5 9. Ceramic resin composite housing (10), according to any one of claims 1 to 8, characterized in that the surface that is the ceramic member (101) and that is bonded to the resin member (102) further comprises a plurality of non-long strip-shaped holes (104), and the non-long strip-shaped holes (104) are filled with the resin material that constitutes the resin member (102).

10. Ceramic resin composite casing (10), according to any one of claims 1 to 9, characterized in that a ceramic member material (101) comprises one or more of an oxide ceramic material, a nitride ceramic material and a carbide ceramic material.

11. Method for preparing a ceramic resin composite shell, as defined in any one of claims 1 to 10, characterized in that it comprises: preparing a ceramic member with a predefined shape using organic fibers as a pore-forming agent, wherein a surface of the ceramic member on which injection molding is pre-executed comprises a plurality of long strip-shaped holes extending from the surface into the interior of the ceramic member, the long strip-shaped holes being formed by loss-on-ignition of the organic fibers, the long strip-shaped holes having an open-hole structure, the pore sizes of the long strip-shaped holes ranging from 700 nm to 500 µm, and the lengths of at least some of the long strip-shaped holes... (Petition 870260052000, dated 05 / 29 / 2026, p. 10)13 / 20 4 / 5 of the long strip are greater than 100 µm and less than or equal to 1000 µm; perform impregnation on the ceramic member using an aqueous solution comprising a nitrogen compound to allow the aqueous solution comprising the nitrogen compound to enter the long strip-shaped holes, and then perform drying to fix a layer of the nitrogen compound to the inner walls of the long strip-shaped holes; and perform injection molding on the dried ceramic member, allowing a resin liquid to enter the long strip-shaped holes to have an exothermic reaction with the nitrogen compound, and perform fine structure processing on a resin piece after injection molding is completed, to obtain a ceramic resin composite shell.

12. Preparation method according to claim 11, characterized in that the nitrogen compound comprises one or more ammonia compounds, a hydrazine compound and its derivative, and a water-soluble amine; a specific method for preparing a ceramic member with a predefined shape using organic fibers as a pore-forming agent comprises one or more of an injection molding method, a tape casting method, a 3D printing method, a hot pressing method, and a fluid paste immersion and sanding method; the preparation of a ceramic member with a predefined shape using organic fibers as a pore-forming agent comprises: mixing ceramic powder, organic fibers, and a bonding agent to prepare a green body of the ceramic member, and sintering the green body of the ceramic member to obtain the ceramic member.

13. Terminal, characterized in that it comprises the ceramic resin composite housing (10), as defined in any one of claims 1 to 10.

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