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The paper investigates the sintering and crystallization behaviour of a LizO-AlsOs-Si02 glass powder containing TiOz and ZrOz. In-situ measuring methods of high-temperature dilatometry, high-temperature X-ray diffractometry and DTA at heating rates between 0.5 and 20 K/mm were conducted. By comparing the results of the different methods the shrinkage could be explained as an overlap of sintering and crystallization processes. As the heating rate increases, the sintering and crystallization processes are more sharply separated, so that higher final densities of the sintered samples are possible.
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Thermoelectric polycrystalline ceramic materials were prepared by a new ceramic technology. Samples of p-type 72% Sb2Te3 + 25% Bi2Te 3 + 3% Sb2Se a doped with tellurium and 90% Bi2Te a + 5% Sb2Te3 + 5% Sb2Se 3 doped with Sbl 3 or Agl were studied. The new ceramic cooling materials have an inhomogene