High-tenacity high-strength far infrared ceramic and preparation method thereof

A far-infrared ceramic, high-strength technology, applied in the field of high-toughness and high-strength far-infrared ceramic materials and its preparation, can solve the problems of high brittleness and low toughness, achieve the effect of improving fracture toughness and overcoming poor mechanical properties

Inactive Publication Date: 2014-03-26
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is mainly to overcome the low toughness and high brittleness of traditional far-infrared bulk ceramic materials, and propose a high-strength, high-fracture-tough far-infrared ceramic material and a preparation method thereof; the difference lies in the ceramic components and Mass percentage: SiC toughened whiskers 5%; ZrO 2 (2Y) precursor 15%; and the proportion of MgO as the skeleton material 5%; the balance is nanometer α-Al 2 o 3 ; where ZrO 2 (2Y) is a zirconia precursor doped and coated with 2% rare earth yttrium, MgO is a submicron powder with a particle size of 0.1-1μm; α-Al 2 o 3 Nano-alumina powder with a purity of more than 99% and a particle size of 50-200nm

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare 1 kg of high-strength and high-toughness far-infrared block material.

[0021] 1) Weigh 0.05 kg of SiC whiskers for industrial use, place them in a 5% polyammonium methacrylate solution at room temperature for 90 minutes, carry out surface modification, and then dry them for later use;

[0022] 2) Configure ZrOCl with a concentration of 30g / L 2 10L of the aqueous solution of 1.5g / L was poured into the 10L hydroxypropyl cellulose alcohol-water mixed solution, and stirred evenly to obtain the mixed solution 1;

[0023] 3) Reheat and boil the mixed solution 1 in step (2), and then neutralize it with 30% ammonia water to a pH value of 7.5 to prepare hydrated zirconium dioxide ZrO 2 ·nH 2 0 solution;

[0024] 4) Weigh 2g Y(OH) 3 Pour it into the ZrO from step 3 2 ·nH 2 0 solution, stirred evenly, and after calcining at 850° C. for 1 h, the precursor of nanometer ZrO2(2Y) was prepared;

[0025] 5) Weigh the prepared nano ZrO 2 (2Y) precursor 0.15kg and α-Al 2...

Embodiment 2

[0030] Prepare 1.5 kg of high-strength and high-toughness far-infrared bulk ceramic material.

[0031] 1) Weigh 0.075 kg of SiC whiskers for industrial use, place them in a 5% polyammonium methacrylate solution at room temperature for 100 min, carry out surface modification, and dry them for later use;

[0032]2) Configure ZrOCl with a concentration of 32g / L 2 20L of the solution, pour it into the 20L hydroxypropyl cellulose alcohol-water mixed solution with a concentration of 3.2g / L, and stir evenly to obtain the mixed solution 1;

[0033] 3) Reheat and boil the mixed solution 1 in step (2), then neutralize it with 30% ammonia water to a pH value of 7.5 to prepare hydrated zirconium dioxide ZrO 2 ·nH 2 0 solution;

[0034] 4) Weigh 3g Y(OH) 3 Pour it into the ZrO from step 3 2 ·nH 2 0 solution, stirred evenly, and calcined at 800°C for 2 hours to prepare nano-ZrO 2 (2Y) precursor;

[0035] 5) Weigh the prepared nano ZrO 2 (2Y) precursor 0.225kg and α-Al 2 o 3 Powde...

Embodiment 3

[0040] Prepare 2 kg of high-strength and high-toughness far-infrared bulk ceramic material.

[0041] 1) Weigh 0.1 kg of SiC whiskers for industrial use, place them in a solution of polyammonium methacrylate with a concentration of 5% for 2 hours at room temperature, carry out surface modification, and dry them for later use;

[0042] 2) Configure ZrOCl with a concentration of 35g / L 2 20L of the solution, pour it into the 20L hydroxypropyl cellulose alcohol-water mixed solution with a concentration of 3.5g / L, and stir to obtain the mixed solution 1;

[0043] 3) Reheat and boil the mixed solution 1 in step (2), then neutralize it with 30% ammonia water to a pH value of 7.5 to prepare hydrated zirconium dioxide ZrO 2 ·nH 2 0 solution;

[0044] 4) Weigh 4g Y(OH) 3 Pour it into the ZrO from step 3 2 ·nH 2 0 solution, stirred evenly, and calcined at 800°C for 2 hours to prepare nano-ZrO 2 (2Y) precursor;

[0045] 5) Weigh the prepared nano ZrO 2 (2Y) precursor 0.3kg and α-A...

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PUM

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Abstract

The invention relates to a far infrared ceramic material, in particular to a high-tenacity high-strength far infrared ceramic and a preparation method thereof. The method comprises steps as follows: (1), alpha-Al2O3 and nano ZrO2 (2Y) precursors are weighed proportionally, put into an aqueous alkaline solution, stirred and mixed, and a high-dispersion and uniformly mixed two-phase aqueous suspension of alpha-Al2O3 and nano ZrO2 (2Y) is prepared; (2) the two-phase aqueous suspension prepared in the step (1) is calcinated into powder; and (3) toughened SiC crystal whisker, the powder prepared in the step (2) and MgO powder are uniformly and proportionally mixed and subjected to compression molding, high-temperature vacuum sintering and furnace cooling, and a ceramic material is prepared. The high-tenacity high-strength far infrared ceramic material has higher far infrared radiation emissivity, and a test shows that the far infrared emission coefficient of the far infrared ceramic material is larger than 0.8; and the ceramic material has high hardness, high temperature resistance, chemical corrosion resistance and abrasion resistance, the service life of the far infrared ceramic is prolonged, and the far infrared ceramic can be applied in more application fields.

Description

technical field [0001] The invention relates to an infrared ceramic material, in particular to a high-toughness and high-strength far-infrared ceramic material and a preparation method thereof. Background technique [0002] The generation of infrared rays is due to the vibration and rotation of material molecules. After the material absorbs infrared energy of a certain wavelength, a resonance phenomenon occurs, causing the vibration and rotation of molecules and atoms to intensify, increasing the energy of motion, so that the object itself is heated and A series of effects occur, such as heating and dehydration of substances and physical and chemical changes inside irradiated substances; infrared radiation ceramic materials are a new type of light-to-heat conversion materials. Infrared ceramics have been widely used in industry, environmental protection, health, etc. However, with the development of science and technology, the improvement of living standards and social civil...

Claims

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Application Information

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IPC IPC(8): C04B35/81C04B35/10C04B35/622
Inventor 李惠焦雷奇岩博
Owner JIANGSU UNIV OF SCI & TECH
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