Rapid synthesis of Nd-doped Y3Fe5O12 garnet waste forms by microwave sintering

Zhang, Shengtai; Wang, Lingkun; Xu, Beibei; Liu, Jian; Luo, Shilin; Ji, Shiyin; Ding, Yi; Zhang, Ling; Ma, Jianjun; Duan, Tao

doi:10.1016/j.ceramint.2021.04.210

Cited by 22 publications

(4 citation statements)

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“…According to previous research, 35,36 a rise in Nd content may also affect the evolution of the solid solution's physical phase. Figure 3 shows the phase evolution under different dosages.…”

Section: Phase Composition and Evolutionmentioning

confidence: 94%

“…Obviously, when the Nd substitution level was x + y = 2.4, the main phase was found to be perovskite while the second phase was garnet, and the zirconia phase gradually disappeared. Although the perovskite structure can also be used as solidified substrate, other researchers 35,36 have shown that the chemical stability of the perovskite structure is lower than that of the garnet structure. In addition, our previous study also showed that the presence of the perovskite phase can adversely affect the chemical stability of garnet solid solution.…”

Section: Phase Composition and Evolutionmentioning

confidence: 99%

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Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Ge,

Xu,

Liao

et al. 2023

J Am Ceram Soc.

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Multiphase ceramics have a high application potential in the field of nuclear waste immobilization because of the efficient synergy between the individual phases. In this work, zirconia/garnet multiphase ceramics with high efficient and effective immobilization capacity of trivalent actinides were successfully prepared using conventional solid‐phase sintering. ZrO2 doping increases the lattice site available for nuclide substitution and advance the immobilization capacity of the ceramic substrate for nuclide. At the same time, the phase change of zirconia is used to tougher and improve the physical properties of the ceramic waste form. The feasibility of using multiphase ceramics for the efficient immobilization of trivalent actinides was assessed by studying the phase evolution, microstructure, Vickers hardness, and chemical stability of the multi‐phase ceramics. Zr1‐xNdxO2‐x/2/Ca3‐yNdyZr3‐yFey‐1Fe3O12 multiphase ceramics exhibited superior physical or chemical properties compared to most of the multiphase ceramics as well as the previously prepared single‐phase calcium garnet ceramic waste forms. The Vickers hardness of all the multiphase ceramic samples ranged between 685 and 730 HV0.5. Under the condition of using simulate Bei Shan groundwater as leaching agent, the normalized leaching rates of Nd is approximately 10−6 g·m−2·day−1, showing good chemical stability and achieving efficient and effective immobilization of trivalent actinides. The excellent chemical, as well as physical properties of Zr1‐xNdxO2‐x/2/Ca3‐yNdyZr3‐yFey‐1Fe3O12 multiphase ceramics are expected to make them one of the substrates for more efficient and effective immobilizing of trivalent actinides.

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Section: Phase Composition and Evolutionmentioning

confidence: 94%

Section: Phase Composition and Evolutionmentioning

confidence: 99%

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Ge,

Xu,

Liao

et al. 2023

J Am Ceram Soc.

Self Cite

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“…The main advantages of microwave sintering are the high volumetric heating adsorption, efficiency as the input power is nearly entirely used on microwave generation, and the production of finer materials with fewer defects (Borrell, 2018). In the nuclear field microwave sintering has been explored for the immobilization of contaminated soils (S. Zhang et al, 2017b), production of garnet wasteforms (Zhang et al, 2021), and geopolymer conversion (Xiang et al, 2021), but these are still developmental.…”

Section: Sinteringmentioning

confidence: 99%

Review of recent developments in iodine wasteform production

et al. 2022

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Radioiodine capture and immobilization is not only important to consider during the operation of reactors (i.e., I-131), during nuclear accidents (i.e., I-131 and I-129) or nuclear fuel reprocessing (i.e., I-131 and I-129), but also during disposal of nuclear wastes (i.e., I-129). Most disposal plans for I-129-containing waste forms (including spent nuclear fuel) propose to store them in underground repositories. Here, iodine can be highly mobile and, given its radiotoxicity, needs to be carefully managed to minimize long-term environmental impacts arising from disposal. Typically, any process that has been used to capture iodine from reprocessing or in a reactor is not suitable for direct disposal, rather conversion into a wasteform for disposal is required. The objectives of these materials are to use either chemical immobilization or physical encapsulation to reduce the leaching of iodine by groundwaters. Some of the more recent ideas have been to design capture materials that better align with disposal concepts, making the industrial processing requirements easier. Research on iodine capture materials and wasteforms has been extensive. This review will act as both an update on the state of the research since the last time it was comprehensively summarized, and an evaluation of the industrial techniques required to create the proposed iodine wasteforms in terms of resulting material chemistry and applicability.

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“…In addition, the introduction of magnetic function into the traditional microwave devices has gradually become a new trend to achieve the multifunction of electronic components, and high saturation magnetization and high dielectric constant are conducive to bring about miniaturization for the system . Yttrium iron garnet Y 3 Fe 5 O 12 (YIG), − as a traditional microwave ferrite material, is an indispensable material for designing microwave devices due to the advantages of high Curie temperature, high resistivity, and low microwave loss, but its dielectric constant and saturation magnetization are still relatively low. Because dielectric constant and dielectric loss are usually a pair of trade-off parameters, it is often difficult for traditional modification methods (such as ion doping and preparation of composite materials) to achieve the application goal of high dielectric constant and low loss at the same time.…”

Section: Introductionmentioning

confidence: 99%

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

Jiao,

You,

Tian

et al. 2023

ACS Appl. Mater. Interfaces

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Y3Fe5O12 (YIG) thin films are highly needed in microwave devices, but the low saturation magnetization and low dielectric constant greatly limit the application of YIG thin films. It was reported that the ion substitution, for example, Pr3+, could increase the dielectric constant of Y3‑x Pr x Fe5O12 (YPr x IG). Unfortunately, the dielectric loss would also be significantly increased. In this work, [YPr0.20IG/YPr0.15IG/YPr0.10IG] N multilayer films were fabricated via the chemical solution deposition method, by designing a periodic structure with the [YPr0.20IG/YPr0.15IG/YPr0.10IG] composition gradient stack. In comparison to the average composition of YPr0.15IG, high saturation magnetization, high dielectric constant, and low loss were successfully simultaneously achieved in the multilayer structure. The N = 6 film exhibited a higher saturation magnetization of 252.8 emu/cm3 than the value (213.1) of the YPr0.15IG (average composition) film. The dielectric constant of the N = 6 film reached 25.6 in contrast to the value of 18.3 for the YPr0.15IG film at 12.4 GHz, which was the contribution of the rapid flip of the electric dipole of a single-unit dielectric material and the accumulation of interface charge. Furthermore, the dielectric loss of the film with N = 6 decreased to 0.0036 compared with the value (0.0102) of the average composition film. This work demonstrated a strategy of designing a periodic structure with a composition gradient stack unit to realize a good comprehensive dielectric property through taking advantage of the multiple effects of “coherent growth, component matching, and interface accumulation”.

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Rapid synthesis of Nd-doped Y3Fe5O12 garnet waste forms by microwave sintering

Cited by 22 publications

References 50 publications

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Zirconia/garnet multiphase ceramics with high immobilization capacity for Nd confers better physical and chemical stability

Review of recent developments in iodine wasteform production

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

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