Sola-gēla pārklājums uz emaljēta leģētā tērauda
Abstract
Darbā aprakstītas jauna materiāla un tehnoloģijas izstrādes stadijas saules enerģijas kolektoriem. Augstas jaudas saules enerģijas kolektora (AJSEK) cauruļveida materiālam jāspēj ilgstoši izturēt augstas temperatūras, neizmainot savu mikrostruktūru un nezaudējot savus sākotnējos siltumtehniskos raksturlielumus. RTU Silikātu materiālu institūta zinātnieki sadarbībā ar LU Cietvielu fizikas institūta speciālistu izstrādājuši tehnoloģiju, kas ļauj iegūt AJSEK saules enerģiju uztverošu materiālu un spēj izturēt 600 °C temperatūru vismaz 250 dienas. Šī materiāla pamatā ir nerūsējošā tērauda cauruļveida iz- strādājums, kuram uzklāts stiklkristālisks emaljas pārklājums. Ilgstošu augsttemperatūras izturību nodrošina ne vien emaljas pārklājuma fritei pievienotās specifiskās piedevas, bet arī emaljai uzklātais sola-gēla nanodaļiņu pārklājums.
Sol-gel coating on enamelled alloy steel
The stages of development of a new material and a technology for solar collectors are described. Pipes for parabolic-trough solar collectors (PTSC) must be able to withstand high temperatures for a long time without changing their microstructure and losing their original thermal characteristics. The scientists from the Institute of Silicate Materials (Riga Technical University) together with a specialist from the Institute of Solid State Physics (University of Latvia) have developed a technology that allows the production of PTSC solar-absorbing materials capable of withstanding 600 °C temperatures for at least 250 days. This material is based on glass-crystalline enamel coating on tubular stainless steel pipes. The high-temperature resistance was ensured not only by specific additives added to the frit of enamel coating, but also by a nanosized sol-gel coating over the enamel.
Keywords – enamel coatings for steel, sol-gel coatings, thermal properties, chemical properties, microhardness
Keywords: |
emaljas pārklājumi tēraudam; sola-gēla pārklājumi; termiskās īpašības; ķīmiskā izturība; mikrocietība
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DOI: 10.7250/msac-2018-0010
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