Nano Archive

Synthesis of CaCu3Ti4O12 ceramic via a sol-gel method

Jin, Shuhua and Xia, Haiping and Zhang, Yuepin and Guo, Juping and Xu, Jun (2007) Synthesis of CaCu3Ti4O12 ceramic via a sol-gel method. Materials Letters, 61 (6). 1404 - 1407.

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The novel nano-ultrafine powders for the preparation of CaCu3Ti4O12 ceramic were prepared by the sol-gel method and citrate auto-ignition method. The obtained precursor powders were pressed, sintered at 1000 °C to fabricate microcrystal CaCu3Ti4O12 ceramic. The microcrystalline phase of CaCu3Ti4O12 was confirmed by X-ray powder diffraction (XRD). The morphology and size of the grains of the powders and ceramics under different heat treatments were observed using scanning electron microscopy (SEM). The relative dielectric constant of the ceramic sintered at 1000 °C was measured with a magnitude of more than 104 at room temperature, which was approaching to those of Pb-containing complex perovskite ceramics, and the loss tangent was less than 0.20 in a broad frequency region. The relative dielectric constant and loss tangent were also compared with that of CaCu3Ti4O12 ceramic prepared by other reported methods.

Item Type:Article
Uncontrolled Keywords:CaCu3Ti4O12; Sol-gel method; Relative dielectric constant; Loss tangent
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:6744
Deposited By:SPI
Deposited On:09 Feb 2010 09:49
Last Modified:09 Feb 2010 09:49

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