Zirconolite glass ceramic curing base material and preparation method thereof

A technology for glass ceramics and perovskite zircon, which is applied in the field of perovskite zircon glass ceramic solidified substrates and their preparation, can solve difficult problems, affect the solidification effect of artificial rocks on radioactive waste, and the technology of artificial rocks solidifying high-level radioactive waste. Complicated and other problems, to achieve the effect of low cost, excellent mechanical properties, not easy to break

Pending Publication Date: 2021-07-30
NO 719 RES INST CHINA SHIPBUILDING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of artificial rock-solidified substrates is the strong selectivity to nuclides. Only radionuclides with suitable valence and ionic radius can be solidified in large quantities in the crystal lattice. The actual radioactive waste contains many diffe

Method used

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  • Zirconolite glass ceramic curing base material and preparation method thereof
  • Zirconolite glass ceramic curing base material and preparation method thereof
  • Zirconolite glass ceramic curing base material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A perovskite zircon glass ceramic solidified substrate, the preparation method is as follows:

[0033] (1) Raw material preparation: Prepare the following raw materials by mass percentage: SiO 2 33%, B 2 o 3 10%, Na 2 CO 3 13%, Al 2 o 3 3.5%, CaO 10.3%, ZrO 2 11.4%, TiO 2 14.8% and CeO 2 4%, the above raw materials are powder raw materials, the particle size is less than 200 mesh;

[0034] (2) mixing and stirring: put each raw material into an alumina crucible and fully mix and stir evenly;

[0035] (3) thermal decomposition: put the crucible with raw materials into the muffle furnace and heat to 865°C, and heat at this temperature for 2 hours;

[0036] (4) High-temperature melting: continue to heat the temperature of the raw materials to 1400°C, and melt at this temperature for 3 hours to make a molten glass;

[0037] (5) Rapid cooling: Pour molten glass into a mold preheated to 500°C, and rapidly cool and solidify at room temperature to form a glass ...

Embodiment 2

[0044] A perovskite zircon glass ceramic solidified substrate, the preparation method is as follows:

[0045] (1) Raw material preparation: Prepare the following raw materials by mass percentage: SiO 2 30%, B 2 o 3 11%, Na 2 CO 3 12.3%, Al 2 o 3 3%, CaO 9.8%, ZrO 2 10.9%, TiO 2 13% and CeO 2 10%, the above raw materials are powder raw materials, the particle size is less than 200 mesh;

[0046] (2) mixing and stirring: put each raw material into an alumina crucible and fully mix and stir evenly;

[0047] (3) thermal decomposition: put the crucible with raw materials into the muffle furnace and heat to 900°C, and heat at this temperature for 2 hours;

[0048] (4) High-temperature melting: continue to heat the temperature of the raw material to 1300°C, and melt at this temperature for 4 hours to make a molten glass;

[0049] (5) Rapid cooling: Pour molten glass into a mold preheated to 400°C, and rapidly cool and solidify at room temperature to form a glass mat...

Embodiment 3

[0055] A perovskite zircon glass ceramic solidified substrate, the preparation method is as follows:

[0056] (1) Raw material preparation: Prepare the following raw materials by mass percentage: SiO 2 35%, B 2 o 3 9%, Na 2 CO 3 13.5%, Al 2 o 3 4%, CaO 11%, ZrO 2 12%, TiO 2 13.5% and CeO 2 2%, the above raw materials are powder raw materials, the particle size is less than 200 mesh;

[0057] (2) mixing and stirring: put each raw material into an alumina crucible and fully mix and stir evenly;

[0058] (3) thermal decomposition: put the crucible with raw materials into the muffle furnace and heat to 850°C, and heat at this temperature for 3 hours;

[0059] (4) High-temperature melting: continue to heat the temperature of the raw material to 1300°C, and melt at this temperature for 4 hours to make a molten glass;

[0060] (5) Rapid cooling: Pour molten glass into a mold preheated to 450°C, and rapidly cool and solidify at room temperature to form a glass matrix...

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Abstract

The invention provides a zirconolite glass ceramic curing base material and a preparation method thereof. The zirconolite glass ceramic curing base material is prepared from the following raw materials in percentage by mass: 30 to 35 percent of SiO2, 9 to 11 percent of B2O3, 12 to 13.5 percent of Na2CO3, 3 to 4 percent of Al2O3, 9.5 to 11 percent of CaO, 10.5 to 12 percent of ZrO2, 13 to 15 percent of TiO2 and 2 to 10 percent of CeO2. The size of crystals in the prepared zirconolite glass ceramic ranges from 1 micrometer to 5 micrometers, the crystals are evenly distributed in a glass body, the single crystal component is the zirconolite crystals, and the zirconolite glass ceramic is stable in chemical property, good in heat stability, excellent in mechanical property, not prone to breakage, suitable for long-term geological storage and low in nuclide leaching rate; and the zirconolite glass ceramic can simultaneously solidify nuclides with long service life and other radionuclides, and has good high radioactive waste inclusiveness.

Description

technical field [0001] The invention relates to the field of radioactive waste solidification treatment, in particular to a perovskite zircon glass ceramic solidification substrate and a preparation method thereof. Background technique [0002] High-level radioactive waste is the waste produced in the reprocessing of nuclear fuel, which mainly exists in two forms: waste liquid generated in the reprocessing of nuclear fuel and waste generated in the process of vitrification of liquid high-level radioactive nuclear waste. The safe and effective disposal of radioactive waste is an important topic concerned by countries all over the world, and it is also an important guarantee for the healthy and sustainable development of the nuclear industry. The currently recognized safer method is to solidify the radioactive waste and carry out deep geological treatment. [0003] The existing materials for solidifying high radioactive nuclides mainly include glass-solidified substrates and ...

Claims

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Application Information

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IPC IPC(8): C03C10/02
CPCC03C10/0009
Inventor 张多飞吴荣俊李晓玲贾靖轩朱国华李文博
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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