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2.3. Ion Conductivity Measurements. The ion conductivities of pellets of the hybrid materials were measured by the ac impedance method. Pellets of the hybrid materials with a diameter of 7 mm and a thickness of 1.5 mm were fabricated by pressing at 4 MPa with Teflon plate covers and then sandwiched between two parallel, 5 mm diameter, gold-coated electrodes. The ion conduc- tivities of the samples were measured in a chamber under flowing nitrogen by the ac impedance method over the frequency range from 1 106 to 1 Hz by using a Solartron 1260 impedance analyzer. |
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sltmac(½ð±Ò+10): 2011-09-13 08:13:42
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hahajing0513
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xiaoqihu
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