The aim of the work is to describe methods of measurement which make non-destructive evaluation of technical and basic material properties of a component (solar cell) possible. The work is divided into the following chapters: 1. Method of operation, construction and mathematical description of solar cells. 2. Development of process of measurement. ...
Germany
The available transparent insulation (TI) materials have an insufficient temperature stability, so that they do not resist in LEGIS walls or collectors maximally occuring temperatures. TI materials of thermoplastics should be developed which support temperatures in continued use of 200 C. Moreover transparent insulation systems which consist of thi...
The report gives an account of the preparation and investigation of the physical properties of (monocrystalline) high-T_c superconductors (YBa_2Cu_3O_7_-_y, Ba_2Sr_2CaCu_2O_8). (orig.) / Berichtet wird ueber die Herstellung und Untersuchung der physikalischen Eigenschaften von (einkristallinen) Hochtemperatursupraleitern (YBa_2Cu_3O_7_-_y, Ba_2Sr_2...
Germany
Germany
Up to the milestone after the half of the project time the reinforcement with particles, short fibres and following technics for the reinforcement with continuous fibres were investigated: (1) Pressure infiltration of submicron particles, (2) CVI-gradient technique, (3) pyrolysis of Si-polymers. The assessment of the results at the milestone did gi...
Within the reported project the feasibility of powder metallurgical production of high-melting-point Pt-alloys was investigated. The powders were produced by gas atomization or PREP. An atomization unit, able to atomize alloys with melting temperatures up to 2000 C, was established. Sintering of semi-finished parts was only possible with a number o...
In the field of integrated optics, nonlinear optical polymeric materials are relative newcomers compared to LiNbO3 and III-V materials. In this paper, we will take a closer look at the state of the art of these polymers, in view of their potential advantages. We will show that these organic materials have many attractive features compared to LiNbO3...
Germany
