The dielectric properties on Pb-complex perovskite with low firing temperature

The authors propose new dielectric compositions and their preparation method. The dielectric compositions comprise lead magnesium niobate, lead zinc niobate, and lead lithium tungstate (PMN-PZN-PLW). They can be fired at a temperature between 1000 and 1050 degrees C, and can thus be used with high-silver-content electrodes in manufacturing MLCCs (multilayer ceramic capacitors). The dielectric constant peak is shifted near room temperature with increasing PMN content, and the optimum composition is 0.77PMN-0.27PZN-0.03PLW with 1 wt.% excess PbO addition. These compositions have dielectric constants in the range of 8000 approximately 12000, the dissipation factor is less than 2%, and the temperature coefficient of capacitance is +5 approximately -47%. These dielectric properties are particularly suitable for Z5U MLCC.<
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