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Y2O3-MgO nano-composite ceramic and preparation method thereof

A multiphase ceramic, y2o3-mgo technology, which is applied in the field of Y2O3-MgO nanocomposite ceramics and its preparation, achieves the effects of low cost of raw materials, improved mechanical strength and simple process

Active Publication Date: 2014-07-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to overcome existing preparation Y 2 o 3 -Defects in the method of MgO nanocomposite ceramics, the present invention provides a method for preparing Y by sol-gel method, spark plasma sintering (SPS) or hot isostatic pressing sintering (HIP) 2 o 3 -MgO nano-composite ceramics method, obtained a Y with uniform two-phase distribution and high infrared transmittance 2 o 3 -MgO nanocomposite ceramics

Method used

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  • Y2O3-MgO nano-composite ceramic and preparation method thereof

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preparation example Construction

[0038] The invention relates to a novel infrared transparent Y 2 o 3 -MgO nanocomposite ceramics and a preparation method thereof, belonging to the technical field of transparent ceramic preparation. It is characterized in that adopting sol-gel method to prepare Y 2 o 3 -MgO nanocomposite powder, and use spark plasma sintering (SPS) or hot isostatic pressing (HIP) or hot pressing sintering (HP) to prepare infrared transparent Y 2 o 3 -MgO nanocomposite ceramics. When the sol-gel method is used, the metal ions can be mixed at the molecular level, which ensures that the two phases of the prepared nano-oxide composite powder are evenly distributed. In addition, a large amount of heat and gas are released during the reaction process, which improves the crystallization performance and dispersibility of the powder, and reduces the particle size of the powder at the same time. Compared with traditional methods (spray pyrolysis method, co-precipitation method, etc.), the cost of...

Embodiment 1

[0076] At a certain amount of Y(NO 3 ) 3 and Mg(NO 3 ) 2 In the mixed solution, add citric acid monohydrate and ethylene glycol respectively, after the total solution is calibrated to 160ml, the concentration of each component is respectively citric acid 0.25mol / L, ethylene glycol 0.08mol / L, Y(NO 3 ) 3 0.23mol / L, Mg(NO 3 ) 2 It is 0.46mol / L. Stir the solution evenly, put it into a preheated 200°C muffle furnace, raise it to 800°C at 1°C / min, keep it warm for 1h, and then cool down naturally. get Y 2 o 3 -MgO nanocomposite powder. Use absolute ethanol as the dispersion medium for ball milling, then dry and sieve. The treated powder was subjected to discharge plasma sintering, wherein the heating rate was 100°C / min, the holding pressure was 80MPa, the holding temperature was 1100°C, and the holding time was 5min. Anneal in air at 1000°C for 15h. Finally, a high-quality infrared transparent Y 2 o 3 -MgO nanocomposite ceramics.

[0077] figure 1 Y prepared for Exam...

Embodiment 2

[0083] At a certain amount of Y(NO 3 ) 3 and Mg(NO 3 ) 2 In the mixed solution, add citric acid monohydrate and ethylene glycol respectively, after the total solution is calibrated to 160ml, the concentration of each component is respectively citric acid 0.25mol / L, ethylene glycol 0.08mol / L, Y(NO 3 ) 3 0.23mol / L, Mg(NO 3 ) 2 It is 0.46mol / L. Stir the solution evenly, put it into a preheated 200°C muffle furnace, raise it to 800°C at 1°C / min, keep it warm for 1h, and then cool down naturally. get Y 2 o 3 -MgO nanocomposite powder. Use absolute ethanol as the dispersion medium for ball milling, then dry and sieve. The treated powder was subjected to discharge plasma sintering, wherein the heating rate was 100°C / min, the holding pressure was 80MPa, the holding temperature was 1200°C, and the holding time was 5min. Anneal in air at 1000°C for 15h. Finally, the infrared transparent Y 2 o 3 -MgO nanocomposite ceramics.

[0084] Figure 6 Y prepared for Example 2 2 o...

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Abstract

The invention relates to a Y2O3-MgO nano-composite ceramic and a preparation method thereof. The Y2O3-MgO nano-composite ceramic is shown as xY2O3.(1-x)MgO, wherein x is the percentage of the mole number of Y2O3 to the total mole number of Y2O3 and MgO; the value of x is more than or equal to 0.01 and less than or equal to 0.99. The method comprises the following steps: preparing Y2O3-MgO nano-composite powder by adopting a sol-gel method; sintering the sieved composite powder by virtue of discharge plasma sintering or hot isostatic pressing sintering to obtain the infrared transparent Y2O3-MgO nano-composite ceramic.

Description

technical field [0001] The invention relates to an infrared transparent Y 2 o 3 -MgO nano-composite ceramics and preparation method thereof, specifically related to a kind of Y with uniform distribution of two phases and infrared transparency 2 o 3 - MgO nanocomposite ceramics and the preparation of the composite ceramics by sol-gel method, spark plasma sintering (SPS), hot isostatic pressing (HIP) or hot pressing sintering (HP). Background technique [0002] Infrared transparent materials refer to materials that can transmit infrared radiation, and are mainly used to manufacture components of infrared instruments, such as windows of infrared detectors, lenses and prisms of optical systems of infrared instruments, etc. Infrared transparent window materials or fairings for aircraft are required to protect the optical system from the atmosphere, moisture, and dust, and at the same time participate in system imaging and correct aberrations, which requires infrared transparen...

Claims

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Application Information

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IPC IPC(8): C04B35/505C04B35/04C04B35/622
Inventor 徐圣泉李江潘裕柏寇华敏石云冯锡淇郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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