CN104528746A - Preparation method of microcrystalline pollucite - Google Patents

Preparation method of microcrystalline pollucite Download PDF

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Publication number
CN104528746A
CN104528746A CN201410735155.XA CN201410735155A CN104528746A CN 104528746 A CN104528746 A CN 104528746A CN 201410735155 A CN201410735155 A CN 201410735155A CN 104528746 A CN104528746 A CN 104528746A
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potassium silicate
solution
pollux
crystallite
preparation
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CN104528746B (en
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李军
侯莉
卢忠远
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Southwest University of Science and Technology
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Southwest University of Science and Technology
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Abstract

The invention discloses a preparation method of microcrystalline pollucite. The method comprises the following steps: dissolving cesium hydroxide in a potassium silicate solution, and cooling to room temperature to obtain a cesium potassium silicate solution; adding metakaolin to the cesium potassium silicate solution, and uniformly stirring to obtain a slurry; injecting the slurry to a steel die, carrying out closed standing at room temperature for 3-5h, and demolding to obtain a solid block; and placing the solid block in a steam autoclave, crystallizing in water steam environment with the temperature of 180DEG C and the pressure of 0.8MPa, and cooling to prepare the microcrystalline pollucite. The method realizes the low temperature synthesis of naturally scarce pollucite pollucite under mild conditions, and avoids harms of high temperature volatilization of Cs and environment pollution; and the prepared microcrystalline pollucite can be used in solidified cesium-containing radioactive wastes, can be used as a radiation source core material, can also be used in high temperature resistant materials in the aviation and aerospace field, and can be widely used in the fields of national defense and military industry.

Description

A kind of preparation method of crystallite pollux
Technical field
The invention belongs to the preparation of the compound containing caesium, relate to a kind of preparation method of crystallite pollux.Adopt the present invention prepare solid inorganic material--crystallite pollux is applicable to adsorption catalysis, radioactive source source core material, contains 137cs nuke rubbish solidify material, and the high temperature material in the field such as aerospace.
Background technology
Pollux (chemical structural formula CsAlSi 2o 6.nH 2o) also claim pollucite, be the main natural mineral form of caesium (Cs) stable existence, its crystalline structure is by (Al, the Si) O sharing bridging oxygen 4tetrahedral network structure skeleton is formed with the parallel Cs ion be distributed in the passage of <111> direction, can hold the Cs more than 40wt% in theory.Pollux has high Cs content, excellent hydrothermal stability and resistance to elevated temperatures (fusing point > 1900 DEG C) etc., can be used for adsorption catalysis, radioactive source source core material, contains 137the fields such as the solidification of Cs nuke rubbish and aerospace, but natural pollux resource scarcity, and many and other silicate minerals symbiosis.In prior art, the preparation method of pollux mainly contains high temperature solid-state method, sol-gel method, zeolite precursor body method, the synthesis temperature that art methods needs is higher, this inevitably causes Cs vaporization at high temperature, etching apparatus, the Cs gas loading that it is formed also is difficult to catch and collect, and brings secondary pollution.Along with the intensification gradually that people are familiar with pollux, pollux materials demand amount is also constantly increased, be badly in need of finding a kind of low temperature, the simple pollux synthetic method of Processes and apparatus.
Summary of the invention
Object of the present invention is intended to overcome deficiency of the prior art, provides a kind of preparation method of crystallite pollux; Thus providing one not need to add other organic formwork agents or crystal seed, technique is simple, the low-temperature synthetic method of the pollux of mild condition (180 DEG C, 0.8MPa thermal and hydric environment).
Content of the present invention is: a kind of preparation method of crystallite pollux, it is characterized in that step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.3 ~ 1.25:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.2 ~ 2:1, stirs, obtains slurry;
C, slurry is injected steel die, room temperature is airtight leaves standstill the demoulding after 3 ~ 5h, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 4 ~ 8h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
In content of the present invention: the silicate potassium solution described in step a is commercially available industrial potash water glass, chemical composition and the percent mass ratio of silicate potassium solution consist of SiO 227.5%, K 2o 15.9%, H 2o56.6%.
In content of the present invention: main chemical compositions and the weight percent of the metakaolin described in step b consist of SiO 250 ~ 55%, Al 2o 340 ~ 45%, (Fe 2o 3, K 2o, Na 2o etc.) other minor component 3% ~ 5%.
In content of the present invention: the steel die size described in step c is Φ 3cm × 3cm preferably.
In content of the present invention: the steam pressure reactor described in steps d can be the FYX40 autoclave (design pressure 3MPa, design temperature 200 DEG C) of Dalian Tong Chan autoclave vessel Manufacturing Co., Ltd.
Compared with prior art, the present invention has features and beneficial effect:
(1) the present invention is adopted, (in temperature 180 DEG C, pressure 0.8MPa thermal and hydric environment) realizes the low temperature synthesis of the pollux of natural resource rareness in a mild condition, without the need to high-temperature calcination, avoids the harm of Cs vaporization at high temperature, contaminate environment, energy consumption is low, is beneficial to environment protection;
(2) adopt the present invention, not needing to add other organic formwork agents or crystal seed, is a kind of green synthesis method meeting Sustainable development;
(3) the crystallite pollux that prepared by the present invention can be used for solidifying the high temperature material containing caesium radwaste, also can be used as radioactive source source core material, also can be used for aerospace field, and in defence and military field, application future is extensive;
(4) adopt the present invention, preparation technology is simple, and operation is easy, easily operates, practical.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope collection of illustrative plates of embodiment 5 product, and Fig. 1 shows that prepared crystallite pollux crystal grain is substantially spherical in shape, and size is about 60nm;
Fig. 2 is the X ray diffracting spectrum of embodiment 5 product, Fig. 2 shows that embodiment 5 product is consistent with pollux data in X ray diffracting data storehouse (Reference code:00-029-0407), and crystal grain is less, namely embodiment 5 product is crystallite pollux;
Fig. 3 is the scanning electron microscope collection of illustrative plates of metakaolin in embodiment, and Fig. 3 shows metakaolin particle used in the form of sheets, and granular size is all below 2 μm;
Fig. 4 is the X ray diffracting spectrum of metakaolin in embodiment, and Fig. 4 shows that metakaolin used is amorphous state substantially, there is a small amount of quartz crystal.
Embodiment
The invention will be further described for embodiment plan given below; but can not be interpreted as it is limiting the scope of the invention; some nonessential improvement and adjustment that person skilled in art makes the present invention according to the content of the invention described above, still belong to protection scope of the present invention.
Embodiment 1:
Be that 0.3:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.2:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 2:
Be that 0.47:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.27:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 3:
Be that 0.67:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.44:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 4:
Be that 0.84:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.59:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 5:
Be that 1.09:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.81:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 6:
Be that 1.25:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.95:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 7:
Be that 1.09:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 1.61:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 8:
Be that 1.09:1 weighs proportioning according to the mass ratio of cesium hydroxide and potassium silicate solution, cesium hydroxide be dissolved in potassium silicate solution, stirring and dissolving, be cooled to room temperature and form potassium silicate caesium solution; After the cooling of potassium silicate caesium solution, be that 2:1 adds metakaolin according to the mass ratio of potassium silicate caesium solution and metakaolin, stir formation slurry; Slurry is injected steel die, and after the airtight standing 3 ~ 5h of room temperature, the demoulding becomes blocks of solid; Blocks of solid is placed in steam pressure reactor, 180 DEG C, cool after crystallization 4 ~ 8h in 0.8MPa steam ambient, i.e. obtained crystallite pollux blocks of solid.
Embodiment 9:
A preparation method for crystallite pollux, step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.3:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.2:1, stirs, obtains slurry;
C, slurry is injected steel die, the demoulding after the airtight standing 4h of room temperature, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 6h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
Embodiment 10:
A preparation method for crystallite pollux, step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 1.25:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 2:1, stirs, obtains slurry;
C, slurry is injected steel die, the demoulding after the airtight standing 4h of room temperature, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 6h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
Embodiment 11:
A preparation method for crystallite pollux, step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.78:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.6:1, stirs, obtains slurry;
C, slurry is injected steel die, the demoulding after the airtight standing 4h of room temperature, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 6h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
Embodiment 12:
A preparation method for crystallite pollux, step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.75:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.5:1, stirs, obtains slurry;
C, slurry is injected steel die, the demoulding after the airtight standing 5h of room temperature, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 7h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
Embodiment 13 ~ 19:
A preparation method for crystallite pollux, step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.3 ~ 1.25:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.2 ~ 2:1, stirs, obtains slurry;
C, slurry is injected steel die, room temperature is airtight leaves standstill the demoulding after 3 ~ 5h, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in water vapor (crystallization) 4 ~ 8h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux;
In each embodiment, the concrete quality of each component raw material sees the following form than consumption:
In above-described embodiment: the silicate potassium solution described in step a is commercially available industrial potash water glass, chemical composition and the percent mass ratio of this silicate potassium solution consist of SiO 227.5%, K 2o 15.9%, H 2o 56.6%.
In above-described embodiment: main chemical compositions and the weight percent of the metakaolin described in step b consist of SiO 250 ~ 55%, Al 2o 340 ~ 45%, (Fe 2o 3, K 2o, Na 2o etc.) other minor component 3% ~ 5%.
In above-described embodiment: the steel die size described in step c can be Φ 3cm × 3cm.
In above-described embodiment: the steam pressure reactor described in steps d can be the FYX40 autoclave (design pressure 3MPa, design temperature 200 DEG C) of Dalian Tong Chan autoclave vessel Manufacturing Co., Ltd.
In above-described embodiment: in the percentage adopted, do not indicate especially, be quality (weight) percentage (being called for short wt%) or well known to a person skilled in the art percentage; Described quality (weight) part can be all gram or kilogram.
In above-described embodiment: the numerical value etc. such as each component raw material consumption are scope, and any point is all applicable.
The concrete same prior art of technology contents described in content of the present invention and above-described embodiment.
Above-described embodiment only have selected metakaolin and the potassium silicate caesium ratio of different hydro Cs2O consumption and different ratios, carry out the preparation of crystallite pollux, different amendments can be made easily on these embodiment bases for those skilled in the art, and General Principle described herein is applied to need not through performing creative labour in other embodiment, therefore, the invention is not restricted to above-described embodiment; Those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.

Claims (5)

1. a preparation method for crystallite pollux, is characterized in that step is:
A, be dissolved in potassium silicate solution by cesium hydroxide, the mass ratio of cesium hydroxide and potassium silicate solution is 0.3 ~ 1.25:1, and stirring and dissolving, is cooled to room temperature, obtains potassium silicate caesium solution;
B, in potassium silicate caesium solution, add metakaolin, the mass ratio of potassium silicate caesium solution and metakaolin is 1.2 ~ 2:1, stirs, obtains slurry;
C, slurry is injected steel die, room temperature is airtight leaves standstill the demoulding after 3 ~ 5h, obtains blocks of solid;
D, blocks of solid is placed in steam pressure reactor, after being placed in the water vapor 4 ~ 8h of temperature 180 DEG C, pressure 0.8MPa, cooling, i.e. obtained crystallite pollux.
2., by the preparation method of crystallite pollux described in claim 1, it is characterized in that: the silicate potassium solution described in step a is commercially available industrial potash water glass, chemical composition and the percent mass ratio of silicate potassium solution consist of SiO 227.5%, K 2o 15.9%, H 2o 56.6%.
3., by the preparation method of crystallite pollux described in claim 1, it is characterized in that: main chemical compositions and the weight percent of the metakaolin described in step b consist of SiO 250 ~ 55 %, Al 2o 340 ~ 45%, other minor component 3% ~ 5%.
4., by the preparation method of crystallite pollux described in claim 1, it is characterized in that: the steel die described in step c is of a size of Φ 3cm × 3cm.
5. by the preparation method of crystallite pollux described in claim 1, it is characterized in that: the steam pressure reactor described in steps d is the large FYX40 autoclave being communicated with product autoclave vessel Manufacturing Co., Ltd.
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CN105731899A (en) * 2016-02-04 2016-07-06 哈尔滨工业大学 Method for synthesizing pollucite by means of aluminosilicate polymer
CN105905920A (en) * 2016-06-16 2016-08-31 同济大学 Method for generating pollucite with soil as raw material
CN107311193A (en) * 2017-08-16 2017-11-03 西南科技大学 A kind of preparation method of pollucite tiny balloon
CN107352550A (en) * 2017-08-16 2017-11-17 西南科技大学 A kind of preparation method of kilogram of yield level pollucite sub-micron ball
CN108190914A (en) * 2018-02-08 2018-06-22 西安建筑科技大学 A kind of synthetic method of solid waste multi-stage porous block ECR-1 zeolites
CN108417286A (en) * 2018-03-14 2018-08-17 清华大学 A method of it impregnates and prepares simulation pollucite source core
CN108470594A (en) * 2018-03-14 2018-08-31 清华大学 A method of it is added dropwise and prepares simulation pollucite source core
CN109678406A (en) * 2019-03-05 2019-04-26 西南科技大学 A kind of preparation method of porous pollucite profile
CN109896823A (en) * 2019-03-05 2019-06-18 西南科技大学 The hydrothermal preparing process of one type natural granite mineral host
CN110028248A (en) * 2019-06-03 2019-07-19 西南交通大学 A kind of method that low-temp liquid-phase sintering prepares pollucite devitrified glass
CN110981205A (en) * 2019-12-25 2020-04-10 中建材蚌埠玻璃工业设计研究院有限公司 Preparation method of microcrystalline glass for treating radioactive cesium polluted soil
CN112466503A (en) * 2020-12-29 2021-03-09 西南科技大学 Preparation method of glass ceramic body for solidifying Cs-containing soil
CN113371725A (en) * 2021-05-21 2021-09-10 中国辐射防护研究院 Method for treating radioactive waste molecular sieve

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CN105731899A (en) * 2016-02-04 2016-07-06 哈尔滨工业大学 Method for synthesizing pollucite by means of aluminosilicate polymer
CN105905920A (en) * 2016-06-16 2016-08-31 同济大学 Method for generating pollucite with soil as raw material
CN105905920B (en) * 2016-06-16 2018-02-09 同济大学 A kind of method that pollucite is generated using soil as raw material
CN107311193A (en) * 2017-08-16 2017-11-03 西南科技大学 A kind of preparation method of pollucite tiny balloon
CN107352550A (en) * 2017-08-16 2017-11-17 西南科技大学 A kind of preparation method of kilogram of yield level pollucite sub-micron ball
CN107311193B (en) * 2017-08-16 2019-11-12 西南科技大学 A kind of preparation method of pollucite tiny balloon
CN108190914A (en) * 2018-02-08 2018-06-22 西安建筑科技大学 A kind of synthetic method of solid waste multi-stage porous block ECR-1 zeolites
CN108190914B (en) * 2018-02-08 2021-06-15 西安建筑科技大学 Method for synthesizing solid waste hierarchical porous block ECR-1 zeolite
CN108417286A (en) * 2018-03-14 2018-08-17 清华大学 A method of it impregnates and prepares simulation pollucite source core
CN108470594A (en) * 2018-03-14 2018-08-31 清华大学 A method of it is added dropwise and prepares simulation pollucite source core
CN108417286B (en) * 2018-03-14 2020-11-27 清华大学 Method for preparing simulated pollucite source core by soaking
CN109896823A (en) * 2019-03-05 2019-06-18 西南科技大学 The hydrothermal preparing process of one type natural granite mineral host
CN109678406A (en) * 2019-03-05 2019-04-26 西南科技大学 A kind of preparation method of porous pollucite profile
CN109896823B (en) * 2019-03-05 2021-08-10 西南科技大学 Hydrothermal preparation method of natural granite-like mineral solidified body
CN109678406B (en) * 2019-03-05 2021-08-10 西南科技大学 Preparation method of porous caesium zeolite section bar
CN110028248A (en) * 2019-06-03 2019-07-19 西南交通大学 A kind of method that low-temp liquid-phase sintering prepares pollucite devitrified glass
CN110028248B (en) * 2019-06-03 2020-03-31 西南交通大学 Method for preparing pollucite microcrystalline glass by low-temperature liquid phase sintering
CN110981205A (en) * 2019-12-25 2020-04-10 中建材蚌埠玻璃工业设计研究院有限公司 Preparation method of microcrystalline glass for treating radioactive cesium polluted soil
CN112466503A (en) * 2020-12-29 2021-03-09 西南科技大学 Preparation method of glass ceramic body for solidifying Cs-containing soil
CN113371725A (en) * 2021-05-21 2021-09-10 中国辐射防护研究院 Method for treating radioactive waste molecular sieve
CN113371725B (en) * 2021-05-21 2022-11-25 中国辐射防护研究院 Method for treating radioactive waste molecular sieve

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