Radiation shielding nanocomposite
AssigneeImam Mohammad Ibn Saud Islamic University
InventorsMohammad Wasef Marashdeh, Islam Gamal Ibrahim Ali Alhindawy, Karem Abdelazim Gaber Mahmoud, Mamduh Jamil Aljaafreh
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Abstract
A nanocomposite includes a zirconia matrix and a metal oxide dispersed in the zirconia matrix and selected from the group consisting of bismuth oxide and tungsten oxide. The nanocomposite is in the form of nanoparticles having an average size of 5-25 nm. A linear attenuation coefficient of the nanocomposite is higher than a linear attenuation coefficient of pure zirconia for gamma-rays having energies of 0.059 MeV to 0.662 MeV. The nanocomposite includes, based on a total weight of the nanocomposite, 40-60 wt. % of Zr, 20-30 wt. % of O, and 20-30 wt. % of Bi or W.
Claims15
A nanocomposite, comprising:
- a zirconia matrix;
- and
- bismuth oxide dispersed in the zirconia matrix, wherein
- the nanocomposite is in the form of nanoparticles having an average size of 10-16 nm,
- the nanoparticles form aggregates that include needle-shaped structures disposed on outer surfaces of the aggregates,
- the aggregates have an average size of 2-20 μm,
- the needle-shaped structures have an average aspect ratio of 3-10,
- the needle-shaped structures have an average length of 0.5-2.0 μm,
- the needle-shaped structures have an average width of 50-600 nm,
- a linear attenuation coefficient of the nanocomposite is higher than a linear attenuation coefficient of pure zirconia for gamma-rays having energies of 0.059 MeV to 0.662 MeV, and
- the nanocomposite comprises, based on a total weight of the nanocomposite,
- 40-60 wt. % of Zr,
- 20-30 wt. % of O, and
- 20-30 wt. % of Bi.
A nanocomposite, comprising:
- a zirconia matrix;
- and
- tungsten oxide dispersed in the zirconia matrix, wherein
- the nanocomposite is in the form of nanoparticles having an average size of 15-22 nm,
- the nanoparticles form aggregates having an average size of 1-4 μm,
- a linear attenuation coefficient of the nanocomposite is higher than a linear attenuation coefficient of pure zirconia for gamma-rays having energies of 0.059 MeV to 0.662 MeV, and
- the nanocomposite comprises, based on a total weight of the nanocomposite,
- 45-55 wt. % of Zr,
- 25-30 wt. % of O, and
- 20-30 wt. % of W.
Dependencies are inferred from the claim text.