Kazimierz Wielki University in Bydgoszcz

About: Kazimierz Wielki University in Bydgoszcz is a education organization based out in Bydgoszcz, Poland. It is known for research contribution in the topics: Population & Luminescence. The organization has 1109 authors who have published 2923 publications receiving 19548 citations. The organization is also known as: Casimir the Great University & Uniwersytet Kazimierza Wielkiego w Bydgoszczy.

Studies on Manufacturing, Mechanical Properties and Structure of Poly(butylene adipate- co -terephthalate)-based Green Composites Modified by Coconut Fibers

Abstract: Proper design and manufacturing of biodegradable composites containing natural fibers is highly demanded to improve its functional properties and reduce effects of the mechanical-thermal degradation at the same time. Therefore investigation of poly(butylene adipate-co-terephthalate) (PBAT) modified with coconut fiber (CF) was performed to analyze changes in selected properties of the modified polymer, occurring upon various amounts of CF and different conditions of processing of blends composed of PBAT and CF. Changes in basic parameters of the extrusion process occurring upon two different plasticizing systems, as well as in mass flow rate, mechanical properties, and structure of PBAT/CF composites were examined. It was found that the design of a plasticizing system essentially influenced energy consumption and stability of the processing procedure as well as properties of manufactured materials. Increase in the weight fraction of CF introduced into the polymer matrix caused increase in rigidity and hardness of the composite and reduction in its strength and ability to deform. No effect of the processing conditions on adhesion at the phase boundary was found. All the prepared composites showed strong adhesion between components. Moreover, based on MFR results it was found occurrence of the mechanical-thermal degradation of both phases, especially the dispersed phase.

High-Pressure Low-Temperature Optical Studies of BaWO4:Ce,Na Crystals.

Abstract: We report detailed optical studies of BaWO4:Ce and BaWO4:Ce,Na single crystals. The material does not emit any luminescence at ambient pressure under near-UV (325 nm) excitation. Efficient green li...

Thermoluminescent Properties of Undoped and Ce-Doped Lutetium Orthosilicate and Yttrium Orthosilicate Single Crystals and Single Crystalline Films Scintillators

Abstract: In this work the comparative analysis of thermoluminescent properties of undoped and Ce-doped single crystals (SC) and single crystalline films (SCF) of Lu2SiO5 (LSO) and Y2SiO5 (YSO) orthosilicates were performed. The SC samples were prepared with the Czochralski method, and SCF were grown by the liquid phase epitaxy technique. We show that such different methods of material preparation resulted in different thermoluminescent properties of undoped and Ce3+ doped LSO and YSO SC and SCF caused by the presence host defects (first of all, oxygen vacancies) as trapping centers in SC and formation of Pb2+-Ce4+ pair centers in SCF.