Two novel protoilludane norsesquiterpenoid esters, named armillasin and armillatin, have been isolated from the artificially cultured mycelium of ARMILLARIA MELLEA (Tricholomataceae). Their structures have been assigned on the basis of a detailed study of their spectral data. Their relative configurations were established from the nuclear Overhauser effects.

Two types of multicomposition PZT composites whose configurations are parallel and series, respectively, were prepared by conventional ceramic processing. Their Fn(LT)-FR(HT) phase transition tehaviors were investigated and compared with that of single composition ceramic materials. The temperature ranges of F,(LT)-F,(HT) phase transition in multi-composition ceramic samples were wider than that in single composition ceramic samples. The former reached 16°C and 10°C. respectively, while the laner was only about 2°C. The peak values of pyroeleceic current of composites decreased when the total area of samples remained unchanged, but they were still much larger than that of ordinary linear pymelectric materials. The two types of multi-composition PZT composites were the candidates for pymelectric sensor materials and can be used for heat-electric energy conversion.