Glue solution for internal gelation process as well as preparation method and application thereof

A technology of glue liquid and mixed liquid, applied in the field of ceramic molding, can solve the problems of reducing the performance of ceramic microspheres, low urea concentration, rupture, etc., and achieve the effects of reducing restriction requirements, prolonging storage time, and good stability.

Active Publication Date: 2020-11-27
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concentration of urea in the glue obtained in the above-mentioned CN104671797A is too low, resulting in a relatively soft gel, which will be cracked or even broken in the subsequent treatment, reducing the performance of the ceramic microspheres

Method used

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  • Glue solution for internal gelation process as well as preparation method and application thereof
  • Glue solution for internal gelation process as well as preparation method and application thereof

Examples

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Embodiment 1

[0035] Embodiment 1 A kind of preparation of glue (do not contain additive)

[0036] The present embodiment provides a kind of preparation of glue, comprising:

[0037](1) At room temperature, add 3 mol of hexamethylenetetramine and 3 mol of urea into deionized water and mix evenly to prepare a 1 L mixed solution to form the first mixed solution;

[0038] (2) Dissolve U3O8 in concentrated nitric acid at room temperature and add deionized water to prepare a 2.8M uranyl nitrate solution with a pH value of 1.8-2.2;

[0039] Take 5ml of the uranyl nitrate solution, add 1ml of complexing agent acetylacetone dropwise into the solution and mix evenly to form the second mixed solution;

[0040] (3) Take the first mixed solution and the second mixed solution and mix them uniformly at a volume ratio of 1:1 to form a third mixed solution to obtain the glue.

[0041] In the obtained glue solution: 1.4 mol / L of metal ion, 1.5 mol / L of hexamethylenetetramine, 1.5 mol / L of urea, and 0.8 mo...

Embodiment 2

[0042] Embodiment 2 A kind of preparation of glue (containing additive)

[0043] The present embodiment provides a kind of preparation of glue, comprising:

[0044] (1) At room temperature, add 3 mol of hexamethylenetetramine and 2 mol of urea into deionized water and mix evenly to prepare a 1 L mixed solution to form the first mixed solution;

[0045] (2) Dissolve U3O8 in concentrated nitric acid at room temperature and add deionized water to prepare a 2.8M uranyl nitrate solution with a pH value of 1.8-2.2;

[0046] Dissolve 1.8g of glucose in 1ml of complexing agent acetylacetone, add 5ml of uranyl nitrate solution into the solution and mix evenly to form the second mixed solution;

[0047] (3) Take 6ml of the first mixed solution and mix them evenly with the second mixed solution at a volume ratio of 1:1 to form the third mixed solution to obtain the glue.

[0048] In the obtained glue solution: metal ion 1.4mol / L, hexamethylenetetramine 1.5mol / L, urea 1mol / L, complexing...

Embodiment 3

[0049] Embodiment 3 A kind of preparation of glue solution (containing additive)

[0050] The present embodiment provides a kind of preparation of glue, comprising:

[0051] (1) At room temperature, add 3 mol of hexamethylenetetramine and 3 mol of urea into deionized water and mix evenly to prepare a 1 L mixed solution to form the first mixed solution;

[0052] (2) Dissolve U3O8 in concentrated nitric acid at room temperature and add deionized water to prepare a 2.8M uranyl nitrate solution with a pH value of 1.8-2.2;

[0053] Dissolve 1.8g of glucose in 1ml of complexing agent acetylacetone, add 5ml of uranyl nitrate solution into the solution and mix evenly to form the second mixed solution;

[0054] (3) Take 6ml of the first mixed solution and mix them evenly with the second mixed solution at a volume ratio of 1:1 to form the third mixed solution to obtain the glue.

[0055] In the obtained glue solution: metal ion 1.4mol / L, hexamethylenetetramine 1.5mol / L, urea 1.5mol / L,...

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Abstract

The invention belongs to the technical field of ceramic forming, and particularly relates to a glue solution for an internal gelation process as well as a preparation method and application thereof. The glue solution comprises metal ions, hexamethylenetetramine and urea, and also comprises a complexing agent acetylacetone or a derivative thereof. The glue solution can keep good stability at normaltemperature, prolong the storage time, simplify devices and equipment of an internal gelation process, such as cooling equipment, reduce the production cost, and realize glue solution conveying and gelation dispersion of industrial large-scale production; and the formed gel is high in strength, so that the situation that the gel is broken or even fragmented in subsequent treatment is avoided.

Description

technical field [0001] The invention belongs to the technical field of ceramic molding, and in particular relates to a glue used in an internal gelling process, a preparation method and application thereof. Background technique [0002] The internal gelation process is an advanced technology for preparing ceramic microspheres, which is widely used in the preparation of high-temperature gas-cooled reactor fuel cores and inert substrates. The basic principle is: drop the glue containing hexamethylenetetramine (urotropine), urea and metal salts (such as zirconium, uranium, titanium, aluminum and other metals) into the hot organic medium, Hexamethylenetetramine decomposes rapidly in the hot organic medium to generate ammonium hydroxide to precipitate metal ions, thereby solidifying the gel. [0003] However, at room temperature, when the glue solution is stored for a long time, the hexamethylenetetramine in the glue solution will automatically decompose, causing the pH value of...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/00C04B35/624C04B35/626
CPCC04B35/00C04B35/01C04B35/624C04B35/62605
Inventor 李建军马景陶郝少昌赵兴宇房勇汉黄治文邓长生刘兵
Owner TSINGHUA UNIV
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