Bases of development of technologies of synthesis of oxide materials in Big solar furnace (Parkent)

The advantages of synthesis of complex oxide compounds by solar energy, the possibility of obtaining highly textured nano materials are shown. The development of heliomaterial science, aimed at the synthesis of new materials, is inextricably linked with the use of effective optical energy systems. On the example of obtaining superconducting materials of nominal composition Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n = 3-20), optimization of the parameters of the optical-energy system of the Big Solar Furnace (Parkent) is shown. The ideology of developing heliotechnology for the synthesis of inorganic materials in a solar furnace is presented. The properties of a superconducting material of nominal Bi1.7Pb0.3Sr2Ca(n1)CunOy (n = 3-20) obtained according to the proposed methodology for the synthesis of materials in a solar furnace are presented

Bi/Pb superconducting phases, with an elevated superconducting transition temperature, synthesized by solar energy

Superconductors superconductor line Bi1,7Pb0,3Sr2Ca(n-1)CunO10-δ(n=5,9,12,19) microstructure, phases compositions, critical temperature to superconducting state transition Tc was investigated. Precursors for superconductors phases synthesis by solar energy have been elaborated. The formation of superconducting homologous phases with a superconducting transition temperature in the range of 240-270 K is determine

LOW-RESISTANCE Bi/Pb CERAMICS CONTAINING Ts = 295К-315K PHASES SYNTHESIZED IN A SOLAR FURNACE (PARKENT)

The aim of this work is to obtain bulk textured superconducting ceramics based on glass-crystalline precursors of the Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n=5-9) series. Technologies for obtaining superconducting materials are presented. The advantages of melt methods and “Super Fast Aloys Quenching–T” technology is shown. Compositions, methods of synthesis and study of properties of precursors and ceramics obtained by solar energy are presented. The interrelation of the morphology of glass-crystalline precursors and superconducting ceramics based on them is revealed. It is shown that nano-sized nuclei are the basis on which superconducting phases with Ts = 295-315K are formed as a result of the peritectic reaction. The mechanism of conduction in nanostructured layered ceramics containing higher superconducting phases is proposed. The contribution to the conductivity of low-resistance ceramics is assumed due to the mutual influence of Bi / Pb homologous phases, which represent a “quasi” heterogeneous system by analogy with the mechanism proposed by Rashba for heterophase semiconductors

Bi / Pb room temperature superconducting phases of Тс=291 К, 295 K obtained by solar energy

The purpose of the study is to obtain superconducting phases with Ts ≥ 260 K. The advanced “Solar Fast Alloys Quenching-T” technology obtained nanoscale precursors and ceramics of nominal composition Bi1.7Pb0.3 Sr2 Ca19Cu20Oy. The main crystalline phase in the precursors is the low-temperature superconducting phase Bi / Pb 2201. According to the ceramic technology, massive samples were obtained from the precursors by calcining at 840-851 oС, 3-120 hours. The microstructure, phase composition, critical temperature of the transition to the superconducting state Ts are investigated. The influence of the properties of precursors on the formation of layered microstructure of ceramics is determined. The obtained superconducting phases with the transition temperature to the superconducting state Ts = 290±5 K. The formation of superconducting phases is due to the influence of technology based on solar energy

EFFECT OF LIGHT ON THE RESISTANCE OF Bi/Pb SUPERCONDUCTORS SYNTHESIZED BY SOLAR ENERGY

The aim of the work is to expand the capabilities of solar technologies and areas of practical use of superconductors. The effect of white light on the interaction of superconducting ceramics with a magnet at room temperature was investigated. It has been established that the magnet is “ejected” by ceramic samples of nominal Bi1,7Pb0,3Sr2Ca(n-1)CunOy, (n = 5-20) under the influence of white light and there is no effect in the dark. The resistance of Bi/Pb superconducting ceramics is reduced by exposure to light compared to resistance in the dark. The resistance of ceramics containing higher superconducting higher superconducting phases Tc = 267-295 K is lower in comparison with “nitrogen” ceramics Tc = 110-120

HEAT RESISTANT CERAMICS ON THE BASIS OF ALUMINIUM TITANATE, MULLITE, SPINEL SYNTHESIZED BY SOLAR ENERGY

Stable aluminium titanate, mullite, shpinele, perspective for use on the glasses production processing are obtained by solar energy. By the technology of moulding and moist pressing heat-resistan, thermostabe, chemically inert ceramic are developed. Thermomechanical properties and chemical stability of ceramics spinnered are investigated