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Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant, and preparation method thereof

A technology of ceramic materials and sucrose, applied in the field of sucrose, can solve the problem that metal metamaterials are difficult to control the negative dielectric constant

Pending Publication Date: 2020-02-04
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the current metal metamaterials are difficult to control the negative dielectric constant, the present invention selects sucrose as the functional material. When the carbon material cracks the indeterminate carbon film at a certain temperature, it can be evenly attached to the surface of the ceramic particles, and the carbon film with easy Tuned negative permittivity metamaterials

Method used

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  • Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant, and preparation method thereof
  • Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant, and preparation method thereof
  • Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) According to the mass ratio of 18 wt% activated carbon, 3 wt% TiO 2 (sintering aid) and the corresponding amount of Al 2 o 3 Weigh, use absolute ethanol as the dispersion medium, place in a ball mill jar and ball mill at 200r / min for 6h. Dry to obtain a uniformly mixed powder, add an appropriate amount of PVA as a binder to grind the obtained powder, granulate, dry, sieve and mold into a ceramic sheet with φ=19mm, t=2mm, and the obtained green body is placed in a horse Sintered in a Furnace.

[0028] (2) Prepare a certain concentration of sucrose growth solution, divide the ceramic sheet in step (1) into four components, and obtain the C / Al 2 o 3 Pyrolysis of carbon ceramic samples.

[0029] (3) Reduction treatment, the samples of different components were placed in a vacuum tube furnace at 600 o C reduced for 2h.

[0030] (4) After grinding and polishing the samples taken out in step (4). The dielectric properties of the samples were measured by using alcoh...

Embodiment 2

[0032] (1) According to the mass ratio of 18 wt% activated carbon, 3 wt% TiO 2 (sintering aid) and the corresponding amount of Al 2 o 3 Weigh, use absolute ethanol as the dispersion medium, place in a ball mill jar and ball mill at 200r / min for 6h. Dry to obtain a uniformly mixed powder, add an appropriate amount of PVA as a binder to grind the obtained powder, granulate, dry, sieve and mold into a ceramic sheet with φ=19mm, t=2mm, and the obtained green body is placed in a horse Sintered in a Furnace.

[0033] (2) Prepare a certain concentration of sucrose growth solution, divide the ceramic sheet in step (1) into four components, and obtain the C / Al 2 o 3 Pyrolysis of carbon ceramic samples.

[0034] (3) Reduction treatment, the samples with different components were placed in a vacuum tube furnace at 750 o C reduced for 2h.

[0035] (4) After grinding and polishing the samples taken out in step (4). The dielectric properties of the samples were measured by using alc...

Embodiment 3

[0037] (1) According to the mass ratio of 18 wt% activated carbon, 3 wt% TiO 2 (sintering aid) and the corresponding amount of Al 2 o 3 Weigh, use absolute ethanol as the dispersion medium, place in a ball mill jar and ball mill at 200r / min for 6h. Dry to obtain a uniformly mixed powder, add an appropriate amount of PVA as a binder to grind the obtained powder, granulate, dry, sieve and mold into a ceramic sheet with φ=19mm, t=2mm, and the obtained green body is placed in a horse Sintered in a Furnace.

[0038] (2) Prepare a certain concentration of sucrose growth solution, divide the ceramic sheet in step (1) into four components, and obtain the C / Al 2 o 3 Pyrolysis of carbon ceramic samples.

[0039] (3) Reduction treatment, the samples with different components were placed in a vacuum tube furnace at 900 o C reduced for 2h.

[0040] (4) After grinding and polishing the samples taken out in step (4). The dielectric properties of the samples were measured by using alc...

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Abstract

The invention relates to a preparation method of an alumina ceramic impregnated sucrose material with an adjustable negative dielectric constant. The material mainly comprises matrix-phase alumina ceramic and conductive-phase sucrose cracked carbon, and the content of the conductive phase in the system is adjusted by adjusting different impregnation times. The component composition of the materialis represented by a chemical formula xC / (1-x)Al2O3. The preparation method comprises the following steps: (1) preparation of the porous alumina ceramic (proportioning, ball-milling, molding and sintering); (2) impregnation of sucrose; and (3) reduction for obtaining the corresponding carbon content. The sucrose is impregnated in the alumina ceramic matrix to reduce cracked carbon as the conductive phase, so the alumina ceramic impregnated sucrose material has excellent performances such as high strength and high hardness of the ceramic material, also has the conductivity, and achieves a negative dielectric constant in a certain range of an external magnetic field.

Description

technical field [0001] The invention relates to the technical field of negative parameters, in particular to sucrose as a source of pyrolysis carbon material. Background technique [0002] Most of the electromagnetic parameters of traditional materials are positive values, and only a few materials in nature have negative parameters. Negative permittivity materials, we call this material with negative parameters called metamaterials. [0003] Most of the electromagnetic parameters of traditional materials are positive values, and only a few materials in nature have negative parameters. Negative permittivity materials, we call this material with negative parameters called metamaterials. Contents of the invention [0004] In order to solve the problem that the current metal metamaterials are difficult to control the negative dielectric constant, the present invention selects sucrose as the functional material. When the carbon material cracks the indeterminate carbon film at...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/626C04B35/64C04B41/85
CPCC04B35/10C04B35/622C04B35/62615C04B35/62695C04B35/64C04B41/85C04B41/5001C04B41/009C04B2235/422C04B2235/3232C04B2235/6567C04B2235/656C04B41/4535C04B41/0072
Inventor 程传兵孙晓沈建兴
Owner QILU UNIV OF TECH