β Scribed by Victor Chang; Humberto Rojas; Jose Jorge
No coin nor oath required. For personal study only.
In the present work, polycrystaihne samples of cuprous oxide, Cu,O, are fabncated and their plezoelectnc and thermoelectnc propertles evaluated both as a polycrystalhne matenal and as a composite matenal Samples are prepared from electrical or analytical grade copper, m powder or sohd form Oxldatlon IS carned out at 1050 "C for 4 h For the polycrystalhne form, the Seebeck coefficient IS about 1 mV/T For the composite form, the c&Lent IS between 0 2 and 0 4 mV/T A plezoelectnc response IS also found For the polycrystallme material, the ratio between generated voltage and applied voltage IS about 0 2 at the resonance frequency For the composite samples, this ratio hes between 0 01 and 0 02 Resonance frequencies are m the range 150 kHz-20 MHz, dependmg on the specific sample The mentioned properties are not greatly dependent on gram size or gram onentafion, probably due to the cubic structure of the Cup0 elemental cell
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