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emilmammadzada
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- Atomic density of Oxygen in a composite
Dear experts, how can I calculate the atomic density of Oxygen in a composite of 05 percent PuO2 and 95 percent UO2 (in atoms/barn-cm)? (5% U235 enriched)
Usually, one would use a mixed materials approach. One has 5% PuO2 (by weight/mass) and 95% UO2, and determine the number of moles of each. Then the atomic fraction is just the moles of O in the total moles of the mixture.emilmammadzada said:TL;DR Summary: Atomic density of Oxygen in a composite
Dear experts, how can I calculate the atomic density of Oxygen in a composite of 05 percent PuO2 and 95 percent UO2 (in atoms/barn-cm)? (5% U235 enriched)
Dear expert, I could not fully understand this answer. Is there a formula to calculate this or a resource that will show how to calculate the oxygen of atomic density in this mixed mixture?Are there any examples on this subject? My aim is to find theoretically the atomic density of oxygen in this mixture.Astronuc said:Usually, one would use a mixed materials approach. One has 5% PuO2 (by weight/mass) and 95% UO2, and determine the number of moles of each. Then the atomic fraction is just the moles of O in the total moles of the mixture.
Atomic wise, one has two atoms of O for each atom of U, Pu, so 0.66 roughly for the atomic fraction. One can find the density based on the densities of the compounds, 10.96 g/cm3 for UO2 and 11.46 g/cm3 for PuO2, which are the theoretical densities (TD) assuming 100% dense, so one may adjust for whatever lower density (e.g., 95% of TD) one expects.
This is a very basic chemistry problem - the atomic density of a given element in a compound.emilmammadzada said:I could not fully understand this answer. Is there a formula to calculate this or a resource that will show how to calculate the oxygen of atomic density in this mixed mixture?Are there any examples on this subject?
Dear expert, can you explain with the example I asked? Just showing the formulation will be enough for me to understand.This subject seems complicated to me, I have a little insufficient knowledge of chemistry.I would be happy if you could explain the question I asked or a simple chemistry example.Astronuc said:This is a very basic chemistry problem - the atomic density of a given element in a compound.
One starts with the mass density, the convert to the number of moles or atoms per unit volume.
Does one know how to convert from mass (g) to moles (g-mole) to atoms? Is one familiar with Avogadro's number, 6.022×1023 atoms/g-mole?emilmammadzada said:Dear expert, can you explain with the example I asked? Just showing the formulation will be enough for me to understand.This subject seems complicated to me, I have a little insufficient knowledge of chemistry.I would be happy if you could explain the question I asked or a simple chemistry example.
Atomic density refers to the number of atoms per unit volume within a material. It is a crucial parameter in materials science because it helps determine the material's properties, such as strength, conductivity, and reactivity. In the context of a composite material, understanding the atomic density of each component, like oxygen, is essential for predicting the overall behavior of the composite.
The atomic density of oxygen in a composite can be calculated by determining the volume fraction of the oxygen-containing component and its atomic or molecular density. This involves knowing the molecular weight of the oxygen component, the density of the material, and Avogadro's number to convert between moles and atoms. The formula used is: Atomic Density = (Avogadro's Number * Density) / Molecular Weight.
Knowing the atomic density of oxygen in a composite is important because it affects the material's chemical and physical properties. For instance, the oxygen content can influence corrosion resistance, thermal stability, and mechanical strength. In applications like aerospace or automotive industries, these properties are critical for safety and efficiency.
The atomic density of oxygen can significantly influence the properties of a composite. High atomic density of oxygen could lead to increased brittleness or lower thermal stability, depending on the matrix and other components of the composite. Conversely, a balanced atomic density can enhance properties like strength, ductility, and resistance to environmental degradation.
Yes, the atomic density of oxygen in a composite can be altered by changing the composition or processing conditions. For example, adding more oxygen-rich phases or altering the fabrication process, such as sintering time and temperature, can modify the oxygen content. These changes can be used to tailor the properties of the composite to meet specific requirements for different applications.