| abstract |
In the process according to the invention for the production of high-density ceramics, oxidic nanoparticles are first produced by hydrolysis of water-sensitive compounds with microemulsions. The particles of the desired stoichiometric composition that are produced are processed to high-density ceramics at very low temperatures using pressure-assisted processes. Due to the narrow particle size distribution, ceramics with a narrow grain size distribution are created from the starting powders produced using microemulsions. Because of the uniformity of the primary particles, the growth rate of the grains is uniform during the sintering process. Ceramics that are produced in accordance with the method according to the invention additionally have smaller leakage currents due to a temperature characteristic of the dielectric material properties that is controlled by the grain size, since the grain sizes grow only slightly during the sintering process and the proportion of electrically blocking grain boundaries thus remains high. |