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A kind of encapsulation method of ceramic microchannel

A packaging method, ceramic micro technology, applied in stone processing equipment, manufacturing tools, stone processing tools, etc., can solve the problems of poor weather resistance, adhesive high temperature resistance, poor solvent resistance, difficult sealing, etc., to achieve simple equipment and process , good chemical resistance, and low packaging cost

Active Publication Date: 2021-11-26
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After microchannels are processed from ceramic materials, it is difficult to seal the microchannels and it is easy to collapse during sintering. The isostatic pressure integrated sintering currently used has complicated equipment and processes and high cost; high-strength gaskets are used for press-fit sealing, Poor weather resistance; high temperature resistance and solvent resistance are poor when using adhesives, and the packaging method of ceramic microchannels directly affects the performance of ceramic microreactors

Method used

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  • A kind of encapsulation method of ceramic microchannel
  • A kind of encapsulation method of ceramic microchannel
  • A kind of encapsulation method of ceramic microchannel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The packaging of ceramic simple three-channel microreactor comprises the following steps:

[0028] (1) Pretreatment of microchannel:

[0029] Polish the surface of two dried ceramic green embryos to ensure that the two green embryos can fit together perfectly, and the outer diameters are almost the same. The flat surface of one of the green embryos is machined to be 6cm long, 0.5mm wide, and 0.5mm There are three high single channels with an interval of 2mm, and they are placed in a dry box for use;

[0030] (2) Microchannel filled with sacrificial paste:

[0031] According to the size of the microchannel, weigh 3g of methyl cellulose, add an appropriate amount of water to fully stir and knead into a paste, fill the prepared sacrificial paste into the microchannel of the ceramic green body, and place it in a 90°C drying oven After drying, scrape off the excess filling paste on the surface to ensure that the microchannels are completely filled; place them in a dry box ...

Embodiment 2

[0038] The encapsulation of complex ceramic microchannels includes the following steps:

[0039] (1) Pretreatment of microchannel:

[0040] Polish the surface of the two dried ceramic green embryos to ensure that the two green embryos can fit together perfectly, and the outer diameters are almost the same. The flat surface of one of the green embryos is machined to be 45cm long, 0.6mm wide, and 0.6mm High single serpentine micro-channel, with 3mm interval between parallel parts, sacrificial paste volatilization channel is opened in the center of the channel, and placed in a dry box for later use;

[0041] (2) Microchannel filled with sacrificial paste:

[0042] According to the size of the microchannel, weigh 10g of methyl cellulose, add an appropriate amount of water to fully stir and knead into a paste, fill the prepared sacrificial paste into the microchannel of the ceramic green embryo, and place it in a 90°C drying oven After drying, scrape off the excess filling paste ...

Embodiment 3

[0049] Encapsulation of complex microchannels of different ceramic materials, including the following steps:

[0050] (1) Pretreatment of microchannel:

[0051]Polish the surface of two dried ceramic green embryos to ensure that the two green embryos can fit together perfectly, and the outer diameters are almost the same. The flat surface of one of the green embryos is machined to be 40cm long, 0.6mm wide, and 0.6mm High single serpentine micro-channel, with 3mm interval between parallel parts, sacrificial paste volatilization channel is opened in the center of the channel, and placed in a dry box for later use;

[0052] (2) Microchannel filling sacrificial paste:

[0053] According to the size of the microchannel, weigh 10g of methylcellulose, add an appropriate amount of water, stir and knead it into a paste, fill the prepared sacrificial paste into the microchannel of the ceramic green body, and place it in a 90°C drying oven After drying, scrape off the excess filling pa...

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Abstract

The invention discloses a packaging method for ceramic microchannels, which comprises the following steps: (1) pretreatment of microchannels: micromachining and polishing ceramic green embryos for use; The paste is filled into the microchannel, dried, and set aside; (3) Integrated packaging of ceramic green bodies: two pieces of ceramic green bodies are bonded with prepared ceramic slurry, dried, polished, and set aside; (4) Sintering of ceramic microchannels Encapsulation: Debinding, sintering, and natural cooling in a high-temperature furnace completes the encapsulation of the ceramic microchannel. The method of the invention can improve the sintering molding rate of the microchannel, simplify the ceramic integrated packaging process and sintering equipment, significantly improve the packaging efficiency and reduce the packaging cost, and ensure the high performance of the ceramic microchannel after packaging.

Description

technical field [0001] The invention relates to a sealing method for ceramic equipment, in particular to a method for packaging microchannels in ceramic microreactors. Background technique [0002] The sub-millimeter fluid channel in the microreactor has a high specific surface area, which has the advantages of enhancing mass and heat transfer of the reaction, reducing reaction conditions, improving product yield and conversion rate, etc. Microreactors have been widely used in chemical and chemical industries field. However, as the types of reaction systems increase, the commonly used metal, silicon, and polymer microreactors cannot meet the high temperature, high mechanical strength, and heavy corrosion environments. Ceramic materials have high chemical resistance, and microreactors made of ceramic materials can be applied to harsh reaction conditions. After microchannels are processed from ceramic materials, it is difficult to seal the microchannels and it is easy to col...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00B24B1/00B28D1/00
CPCB24B1/00B28D1/00C04B37/003
Inventor 田蒙奎刘润阳
Owner GUIZHOU UNIV