Aem Lect4

The document summarizes two methods for synthesizing nanostructured ceramic powders: the mimic alkoxide method and hydrothermal synthesis. The mimic alkoxide method involves dissolving a cerium precursor in alcohol and adding it dropwise to a precipitating solution, producing nanocrystalline powder with primary particles around 15nm that are well-sintered at lower temperatures than aqueous precipitation. Hydrothermal synthesis uses high-temperature high-pressure water to precipitate oxides from precursor solutions, producing crystalline anhydrous powder without needing calcination or milling, and employing inexpensive raw materials. It is highlighted for making solid-solution particles for multilayer ceramic capacitors.