0000000001089761
AUTHOR
Kari Lahti
Influence of low amounts of nanostructured silica and calcium carbonate fillers on the large-area dielectric breakdown performance of bi-axially oriented polypropylene
Influence of low amounts (1.0-2.0wt-%) of nanostructured silica and calcium carbonate fillers on the large area dielectric breakdown performance of bi-axially oriented polypropylene (BOPP) is analyzed. A multi-breakdown measurement method based on the self-healing breakdown capability of metallized film is utilized for the breakdown characterization in order to cover relatively large total film areas, thus leading to results of higher relevance from the practical point-of-view. The dispersion and distribution qualities of filler particles at the nanoscale are evaluated with transmission electron microscopy (TEM) imaging. Weibull statistical analysis suggests that the breakdown distribution …
Large-area dielectric breakdown performance of polymer films
In this study, large-area dielectric breakdown performances of various bi-axially oriented polypropylene (BOPP)-silica nanocomposite films are studied by utilizing the self-healing multi-breakdown method presented in the Part I of this publication. In particular, the effects of silica filler content, pre-mixing method, co-stabilizer content and film processing on the large-area breakdown performance are analyzed. Nanostructural and film cross-sectional analyses are correlated to the breakdown responses. The optimum silica filler content is found to reside at the low fill fraction level (~1 wt-%) and automatic pre-mixing of the raw materials and the optimization of the orientation temperatur…
The Finnish Biodiversity Information Facility FinBIF - an integrated open data infrastructure supporting research and decision-making in conservation.
FinBIF was established to accelerate digitisation, mobilisation, and distribution of biodiversity data and to boost its use in research, administration, and the private sector. The core of the service has been built in a 3.5-year project ending in June 2018. The service has been operational since 2015, but it is continuously being developed. FinBIF comprises (1) a growing network of generators of data (species observations, specimens in collections, DNA barcodes); (2) a data warehouse integrating copies of primary datasets; and (3) the portal Laji.fi / Species.fi where anyone can search the data and download it for use. FinBIF is built to mediate all open-access biodiversity data in Finland…