A vaporization core, a method of manufacturing the same, and an electronic vaporization device comprising the same are disclosed. The vaporization core includes a tubular porous substrate for forming a vaporization cavity and configured to guide liquid outside the tubular porous substrate into the vaporization cavity and a heating element disposed on an inner wall of the tubular porous substrate and configured to heat and vaporize the liquid guided into the vaporization cavity.

A thermally conductive and electrically insulating substrate structure and a method for manufacturing the same are provided. The thermally conductive and electrically insulating substrate structure includes an insulating layer, a plurality of metal layers and a plurality of function layers. The plurality of metal layers and the plurality of function layers are disposed on the insulating layer. A sidewall of the metal layer is in contact with a corresponding one of the function layers, and two of the function layers between any two adjacent ones of the metal layers are not in contact with each other.

A porous ceramic laminate, which can reduce pressure loss of a fluid, includes a first porous layer and a second porous layer. The second porous layer is laminated on, in contact with or via air, the first porous layer. A part of the second porous layer is laminated on, in contact with, the first porous layer. Each of the first porous layer and the second porous layer contains a metal oxide. A ratio Da/Db of an average pore diameter Da of the first porous layer relative to an average pore diameter Db of the second porous layer is 10 or more. A proportion of a portion in which a distance between the first porous layer and the second porous layer is smaller than 1 μm is 70% or less.

The disclosure relates to a Low Temperature Co-fired Ceramic (LTCC) substrate and a preparation method thereof, and in particular to a dielectric-constant-adjustable LTCC substrate and a preparation method thereof. The LTCC substrate of the disclosure includes the following components: glass, SiO.sub.2 and Al.sub.2O.sub.3, a weight percentage of the SiO.sub.2 in the LTCC substrate is 10% to 25%.

The present disclosure relates to a method for manufacturing a ceramic heater. The method for manufacturing a ceramic heater according to the present disclosure comprises: separately charging a ceramic powder into a center portion and multiple split edge portions in a formation mold and leveling the charged ceramic powder; manufacturing a molded body or pre-sintered body of the ceramic powder from the leveled ceramic powder; disposing a high-frequency electrode or a heating element on the molded body or pre-sintered body of the ceramic powder and filling a second ceramic powder; and integrally sintering the molded body or pre-sintered body of the ceramic powder and the second ceramic powder.

A cordierite-based sintered body according to the present invention contains cordierite as a main component and silicon nitride or silicon carbide. The cordierite-based sintered body preferably has a thermal expansion coefficient less than 2.4 ppm/° C. at 40° C. to 400° C., an open porosity of 0.5% or less, and an average grain size of 1 μm or less.

The disclosure describes techniques for forming a surface layer of an article including a CMC using a cast. In some examples, the surface layer includes three-dimensional surface features, which may increase adhesion between the CMC and a coating on the CMC. In some examples, the surface layer may include excess material, with or without three-dimensional surface features, which is on the CMC. The excess material may be machined to remove some of the excess material and facilitate conforming the article to dimensional tolerances, e.g., for fitting the article to another component. The excess material may reduce a likelihood that the CMC (e.g., reinforcement material in the CMC) is damaged by the machining.

A production method for producing a product by joining a first part containing an inorganic powder and a binder to a second part containing an inorganic powder and a binder is provided. The production method includes a first step of forming the first part by a three-dimensional shaping apparatus, a second step of forming the second part, a third step of assembling the first part and the second part, thereby obtaining an assembly, a fourth step of heating the assembly at a first temperature, and a fifth step of heating the assembly at a second temperature higher than the first temperature after the fourth step, wherein the first part has a first region that comes in contact with the second part and a second region that does not come in contact with the second part, and a melting point of the binder contained in the first region is lower than a melting point of the binder contained in the second region.

A multilayer substrate that includes a first ceramic layer that is a dense body, a second ceramic layer that has open pores, and a resin layer adjacent the second ceramic layer, wherein a material of the resin layer is present in the open pores of the second ceramic layer.

The present disclosure discloses a hybrid woven fiber preform-reinforced composite material, including a fiber preform, a composite material interface and a matrix, where the fiber preform is a three-dimensional fabric hybrid woven by 2-5 high-performance inorganic fibers, and the matrix is selected from the group consisting of resin, light alloy, carbon and ceramic. A preparation method of the composite material includes: preparing ceramic slurry, fiber bundle impregnation treatment, fiber weaving, molding of three-dimensional overall structure preform, preform heat treatment, preparing interface and preparing matrix. The present disclosure improves the weaving performance of inorganic rigid fibers, and the prepared hybrid woven fiber preform-reinforced composite material has desirable integrity, high interlayer bonding strength, and is not easy to layer. Meanwhile, the present disclosure realizes the functions of wave transmission, wave-absorbing, high-temperature structural material, thermal insulation and thermal prevention through the combination of hybrid woven fibers.