Thermoelectric properties of nano-meso-micro β-MnO₂ powders as a function of electrical resistance
Particle sizes of manganese oxide (β-MnO₂) powders were modified by using a mortar and pestle ground method for period of times that varied between 15–60 min. Particle size versus ground time clearly shows the existence of a size-induced regime transition (i.e., regime I and II). Thermoelectric properties of β-MnO₂ powders as a function of electrical resistance in the range of RP = 10 - 80Ω were measured. Based on the data presented, we propose a model for the β-MnO₂ system in which nanometer-scale MnO₂ crystallites bond together through weak van der Waals forces to form larger conglomerates that span in size from nanometer to micrometer scale.
- James Madison Univ., Harrisonburg, VA (United States). Dept. of Physics and Astronomy
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Div.
- Publication Date:
- OSTI Identifier:
- Grant/Contract Number:
- Accepted Manuscript
- Journal Name:
- Nanoscale Research Letters
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 1931-7573
- Research Org:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org:
- Country of Publication:
- United States
- 77 NANOSCIENCE AND NANOTECHNOLOGY; 36 MATERIALS SCIENCE thermoelectric properties; transition metal oxides; manganese oxide; seebeck coefficient; figure of merit; particle size versus electrical resistance
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