Investigations of the electon emission of (Ba, Pb)TiO3 ceramics and BaTiO3 single crystals induced by bipolar sinusoidal and rectangulr‐shaped electric field or dc electric field, in the vicinity of their phase transitions, are performed. The differences in the electron emission behaviour between (Ba, Pb)TiO3 ceramics and BaTiO3 single crystals covered with a strip‐shaped electrode, on the one hand, and between BaTiO3 crystal samples with free emitting sample surface and emitting surface covered by a comb‐shaped electrode, on the other hand, are evidenced. The mechanisms of this electron emission are discussed.

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AC field‐excited electron emission from 5.1/65/35 and 10.4/64/36 PLZT ceramic samples is investigated. The electrons are emitted only during every second half‐period of the applied ac electric field. In the diffuse phase transition regions, the intensity of the electron emission for 5.1/65/35 ceramic samples increases with temperature and decreases for 10.4/63/36 ones. The time distributions of electrons emitted during the emissively active field half‐period are also different. The mechanism of this electron emission, based on electron tunnelling from a surface space‐charge layer into vacuum is discussed.

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