Kinetics dependencies of electrical conduction of dielectrics irradiated with ions after influence ozone in air were considered. Possibility of the creation an ozone-sensitive elements on the base modified by ions BN and SiO/sub 2/ was showed.

An analysis of current features in the gap with immovable electrodes and a moving barrier at a constant voltage is made. Equivalent circuits of discharge gap for constant and pulse components of the discharge current are proposed. Experimental results of studies of discharge current pulsed component are presented.

A DC-voltage ozone generator with a barrier discharge is described. The discharge is formed between fixed metallic electrodes placed at a small distance from both surfaces of a disc dielectric rotor, and charged sections of its surface. The discharge has the form of a series of microdischarges, the duration of whose current pulses is on the order of 10 ns. The discharge current depends on the dynamic barrier capacitance, number of electrodes, and rotor rotation rate. The quantity of the produced ozone rises with the increase in the velocity of gas travelling through the discharge gaps. The maximum output of 7 gk at a 0.2-g/m(3) ozone concentration is achieved at a 35-m(3)/h air consumption. The power consumption for ozone production was 12.5 kWh/kg, which is less than that of ac or pulse voltage ozonizers of the traditional design.

The physical properties of rhombohedral pyrolytic boron nitride are discussed, with particular attention to the effect of structural anisotropy on charge and heat transport.

The results of investigations of X-ray and electron diffraction in polycrystalline zirconia and boron nitride with nanometer-sized crystallites having different interface types are presented. The lattices of zirconia crystallites are conjugated by contact strain-distorted interfaces. Boron nitride consists of crystallites having extended interfaces without long-range order. Disorder is the consequence of decreasing internal strain during polygonization of peripheral crystallite regions. However, in spite of various distortions in periodicity, materials under study have similar selected area (∼0.8 μm) electron diffraction patterns. The integrated diffraction pattern (X-ray diffraction) from an ensemble of uniformly oriented crystallites having both types of interfaces can be simulated as a superposition of reflections from the atoms located at the lattice sites and from amorphous interfaces. The structure-diffraction features of nanometer-sized materials have been deduced from these results.

We have studied the structure and phases of boron nitride and zirconium dioxide (both have a wide spectrum of crystalline sizes) using x-ray analysis and electron diffraction microscopy. We show that, even when the crystallites are of order 100 nm, their diffraction pattern is similar to that of other nanocrystalline materials. This pattern is dictated by the high degree of dispersion and the lattice distortions of the crystallites' periphery. The distortions in these materials are caused by internal stresses. In boron nitride the stress relaxes by polygonization of the peripheral regions. This destroys the long-range translational order and leads to the formation of intercrystallite regions due to incoherent binding between crystals. In zirconium oxide short-range order is destroyed by variations in the lattice constants in the regions near the crystal faces.