Zobrazeno 1 - 10
of 35
pro vyhledávání: '"L. Olumekor"'
Autor:
Eva Wäckelgård, G. Katumba, Gibion Makiwa, Andrew Forbes, Bonex W. Mwakikunga, Jun Lu, L. Olumekor
Publikováno v:
Solar Energy Materials and Solar Cells. 92:1285-1292
Selective solar absorber coatings of carbon embedded in ZnO and NiO matrices on aluminium substrates have been fabricated by a sol–gel technique. Spectrophotometry was used to determine the solar absorptance and the thermal emittance of the composi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::600e244a6dea5484e6aebb1ada436e72
https://doi.org/10.1016/j.solmat.2008.04.023
https://doi.org/10.1016/j.solmat.2008.04.023
Publikováno v:
Journal of Sol-Gel Science and Technology. 36:33-43
Carbon-silica composite films have been fabricated using sol-gel synthesis of silica-carbon precursor composites, followed by carbonization in an inert atmosphere. Four categories of samples were studied. These were the tetraethyl orthosilicate-only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3790e39e20aa5585065b6f317ef6b52c
https://doi.org/10.1007/s10971-005-4793-4
https://doi.org/10.1007/s10971-005-4793-4
Publikováno v:
Measurement Science and Technology. 14:N45-N49
A microcontroller-based multi-sensor temperature measurement and control system that uses a steady-state one-dimensional heat-flow technique for absolute determination of thermal conductivity of a rigid poor conductor using the guarded hot-plate meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03ca758f671b3c359d75d2a0e4e70c3f
https://doi.org/10.1088/0957-0233/14/8/402
https://doi.org/10.1088/0957-0233/14/8/402
Autor:
L. Olumekor, G. Katumba
Publikováno v:
Journal of Materials Science. 34:6041-6044
Cermet thin films of Cu-MgF2 were deposited onto glass substrates using a conventional resistive heating co-evaporation technique. Films of starting compositions 40, 60 and 80 vol % Cu and average thicknesses 60, 145 and 285 nm were deposited at elev
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9847c79df3ce8d6b9cb12be1ad94435f
https://doi.org/10.1023/a:1004749316002
https://doi.org/10.1023/a:1004749316002
Publikováno v:
physica status solidi c. 5:549-551
It is possible to design an optical material, through control of the substrate and coatings, to absorb a large fraction of the solar spectrum and to emit very little radiation energy in the near and far infra-red wavelength range. This requires a coa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9070dce03aa04f40e2a57164597772c7
https://doi.org/10.1002/pssc.200776823
https://doi.org/10.1002/pssc.200776823
First performance analysis of a silicon-cell microcontroller-based solar radiation monitoring system
Publikováno v:
Solar Energy. 63:313-321
This paper demonstrates the operation of a low-cost silicon pyranometer in combination with a self-designed low-power microcontroller-based data acquisition system for monitoring global horizontal solar radiation. The performance and behaviour of thi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10f13318578c849e15cdb9fc850ab0f8
https://doi.org/10.1016/s0038-092x(98)00072-3
https://doi.org/10.1016/s0038-092x(98)00072-3
Autor:
G. Katumba, L. Olumekor
Publikováno v:
Journal of Materials Science. 35:2557-2559
Cermet composite thin film resistors of Cu and MgF2 were prepared by conventional vacuum evaporation technique at a pressure of 5 × 10−5 torr and at 302 ± 2 K. The composition by volume was varied from 10 vol% Cu and 90 vol% MgF2 to 100% Cu for t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d04f00c3c6cf862f38b393288ce0433d
https://doi.org/10.1023/a:1004754710326
https://doi.org/10.1023/a:1004754710326
Publikováno v:
SPIE Proceedings.
Selective solar absorber coatings of carbon dispersed in SiO2, ZnO and NiO matrices on aluminium substrates have been fabricated by a sol-gel technique. Spectrophotometry was used to measure the near-normal reflectance of the composite coatings. Calc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6622cb384e91a0dcacd656b5d7dfa885
https://doi.org/10.1117/12.793705
https://doi.org/10.1117/12.793705
Publikováno v:
SPIE Proceedings.
We present a cheaper and environmentally friendly method to fabricate efficient spectrally selective solar absorber materials. The sol-gel technique was used to fabricate carbon-silica (C-SiO2) and carbon-nickel oxide (C-NiO) composite films on alumi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f609c14ed0a03a42598a437a6b972cf7
https://doi.org/10.1117/12.792654
https://doi.org/10.1117/12.792654
Publikováno v:
Journal of Materials Science: Materials in Electronics. 1:118-122
Investigations have been carried out on the electrical properties of nickel-based films prepared from air-fireable pastes on alumina substrates. In particular, magnetoresistive effects have been studied as a function of temperature, strength and dire
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbfab2dbc6de8531e3da6d155e44179d
https://doi.org/10.1007/bf00694920
https://doi.org/10.1007/bf00694920