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Method for preparing pollucite glass ceramic by low-temperature liquid phase sintering

A technology of glass-ceramics and low-temperature liquid phase, which is applied in glass forming, glass manufacturing equipment, manufacturing tools, etc., can solve the problems of high synthesis temperature, corrosion equipment, high-temperature volatilization of Cs, etc., and achieve simple process and equipment, avoid High temperature volatilization and easy operation

Inactive Publication Date: 2019-07-19
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, sodium ions have strong activity, and the use of vitrification is not good for its long-term stability.
[0004] In the prior art, the preparation methods of cesium garnet glass-ceramics mainly include high-temperature glass melting-crystallization, sol-gel method, and precursor method. The synthesis temperature required by the prior art method is relatively high, which will inevitably cause Cs volatilizes at high temperature, corrodes equipment, and the Cs airborne substances formed are also difficult to capture and collect, causing secondary pollution

Method used

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  • Method for preparing pollucite glass ceramic by low-temperature liquid phase sintering
  • Method for preparing pollucite glass ceramic by low-temperature liquid phase sintering
  • Method for preparing pollucite glass ceramic by low-temperature liquid phase sintering

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Embodiment 1

[0037] A method for preparing cesium garnet glass-ceramic by low-temperature liquid-phase sintering provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0038] (1) get solid raw material activation kaolin, boric acid, cesium hydroxide monohydrate and sodium hydroxide, according to the molar ratio of chemical element is Cs 0.8 Na 1.2 O·Al 2 o 3 ·5SiO2 2 0.7B 2 o 3 The composition, after carrying out proportioning and weighing, puts into ball mill jar;

[0039] (2) add deionized water and carry out ball milling, ball milling time 8 hours;

[0040](3) After ball milling, pour out the slurry and dry it at a temperature of 70-90°C for 24 hours;

[0041] (4) After drying, the powder is ground, shaped and sintered, the sintering temperature is set at 650° C., and the sintering time is 3 hours to obtain a sample, which is designated as Embodiment 1.

Embodiment 2

[0043] A method for preparing cesium garnet glass-ceramic by low-temperature liquid-phase sintering provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0044] (1) get solid raw material activation kaolin, boric acid, cesium hydroxide monohydrate and sodium hydroxide, according to the molar ratio of chemical element is Cs 0.4 Na 1.6 O·Al 2 o 3 4SiO2 2 0.9B 2 o 3 The composition, after carrying out proportioning and weighing, puts into ball mill jar;

[0045] (2) Add deionized water and carry out ball milling, and the ball milling time is 9 hours;

[0046] (3) After ball milling, pour out the slurry and dry it at a temperature of 70-90°C for 24 hours;

[0047] (4) After drying, the powder is ground, shaped and sintered. The sintering temperature is set at 750° C. and the sintering time is 4 hours to obtain a sample, which is designated as Embodiment 2.

Embodiment 3

[0049] A method for preparing cesium garnet glass-ceramic by low-temperature liquid-phase sintering provided by a preferred embodiment of the present invention, the specific steps are as follows:

[0050] (1) get solid raw material activation kaolin, boric acid, cesium hydroxide monohydrate and sodium hydroxide, according to the molar ratio of chemical element is Cs 1.8 Na 0.2 O·Al 2 o 3 ·6SiO2 2 1.2B 2 o 3 The composition, after carrying out proportioning and weighing, puts into ball mill jar;

[0051] (2) Add deionized water and carry out ball milling, and the ball milling time is 9 hours;

[0052] (3) After ball milling, pour out the slurry and dry it at a temperature of 70-90°C for 24 hours;

[0053] (4) After drying, the powder is ground, shaped and sintered, the sintering temperature is set at 950° C., and the sintering time is 4 hours to obtain a sample, which is designated as Embodiment 3.

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Abstract

The invention discloses a method for preparing pollucite glass ceramic by low-temperature liquid phase sintering. Activated kaolin, boric acid, barium hydroxide monohydrate and sodium hydroxide are used as raw materials, then properly proportioned and weighed, and then pulverized by an aqueous solution solid phase ball grinding process, and are subjected to forming and normal-pressure sintering. By adoption of a low-temperature liquid phase sintering mode, the pollucite glass ceramic can be prepared at a relatively low sintering temperature, and caesium can be effectively solidified.

Description

technical field [0001] The invention belongs to the technical field of cesium garnet glass-ceramics, and in particular relates to a method for preparing cesium garnet glass-ceramics by low-temperature liquid phase sintering. Background technique [0002] In order to achieve sustainable development, human beings urgently need new alternative energy sources. At present, the energy that has reached industrial applications and can replace fossil fuels on a large scale is mainly nuclear energy. Nuclear power development complies well with certain principles of sustainable development, but there are still some important aspects to consider. They are uranium supply, nuclear waste disposal, nuclear fuel safety cycle and nuclear power plant operation safety. Among them, the nuclear waste generated by spent fuel contains high radioactive nuclides (such as Sr 90 、Cs 137 , actinides, etc.), which have a long decay cycle and radiation dose, will inevitably pose a potential threat to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/10C03B19/06
CPCC03B19/06C03C10/0018
Inventor 陈松黎文刘力克徐博孙红亮蒋小松王良辉
Owner SOUTHWEST JIAOTONG UNIV
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