To research the structure radiation stability of simulated Gd2Zr2O7-pyrochlore glass-ceramic wasteforms Nd3+, Ce4+ were selected as the simulated nuclide of An3+ and An4+ radionuclides respectively. A series of compou...To research the structure radiation stability of simulated Gd2Zr2O7-pyrochlore glass-ceramic wasteforms Nd3+, Ce4+ were selected as the simulated nuclide of An3+ and An4+ radionuclides respectively. A series of compounds with the general formula Gd2-xNdxZr2-xCexO7 (0.0≤ x ≤2.0) were prepared by High-temperature sintering method at 1623 K for 48 h in air atmosphere. The heavy-ion irradiation experiments were done at room temperature and atmospheric pressure. The structure and microscopic morphology of Gd2-xNdxZr2-xCexO7 (0.0≤ x ≤2.0) glass-ceramic wasteforms before and after irradiation experiments were investigated by the X-ray diffraction and scanning electron microscopy.展开更多
Investigation of the substitution process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. In this work the effects of substitution Lanthanum (La) for Gadolinium (Gd) on...Investigation of the substitution process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. In this work the effects of substitution Lanthanum (La) for Gadolinium (Gd) on the structure and oxygen content for x = 0.0 - 0.5 in the compound Gd1-xLaxBa2Cu3O7-δ (GLBCO-123 phase) have been investigated. Samples were synthesized by using a wet-mixing method from powders of Gd2O2, La2O2, BaO, CuO, and solution of HNO3. Based on the analysis of XRD data and SEM-EDXA, it confirms that the sample has formed the GLBCO-123 phase, as expected. It has been obtained that the lattice parameters a and c are increased while the parameter b is slightly decreased with increasing content of Lanthanum. The oxygen content slightly decreased and structure of the Gd1-xLaxBa2Cu3O7-δ phase changed from orthorhombic to tetragonal with increasing the content of Lanthanum.展开更多
文摘To research the structure radiation stability of simulated Gd2Zr2O7-pyrochlore glass-ceramic wasteforms Nd3+, Ce4+ were selected as the simulated nuclide of An3+ and An4+ radionuclides respectively. A series of compounds with the general formula Gd2-xNdxZr2-xCexO7 (0.0≤ x ≤2.0) were prepared by High-temperature sintering method at 1623 K for 48 h in air atmosphere. The heavy-ion irradiation experiments were done at room temperature and atmospheric pressure. The structure and microscopic morphology of Gd2-xNdxZr2-xCexO7 (0.0≤ x ≤2.0) glass-ceramic wasteforms before and after irradiation experiments were investigated by the X-ray diffraction and scanning electron microscopy.
文摘Investigation of the substitution process can provide a better understanding of the superconducting mechanisms in cuprous oxide materials. In this work the effects of substitution Lanthanum (La) for Gadolinium (Gd) on the structure and oxygen content for x = 0.0 - 0.5 in the compound Gd1-xLaxBa2Cu3O7-δ (GLBCO-123 phase) have been investigated. Samples were synthesized by using a wet-mixing method from powders of Gd2O2, La2O2, BaO, CuO, and solution of HNO3. Based on the analysis of XRD data and SEM-EDXA, it confirms that the sample has formed the GLBCO-123 phase, as expected. It has been obtained that the lattice parameters a and c are increased while the parameter b is slightly decreased with increasing content of Lanthanum. The oxygen content slightly decreased and structure of the Gd1-xLaxBa2Cu3O7-δ phase changed from orthorhombic to tetragonal with increasing the content of Lanthanum.
