DIY Zero-Expansion Glass-Ceramics. (GC Part 2)

Video Description

This video shows how you can decrease the already very low Coefficient of Thermal Expansion of glass-ceramics Ceran and Robax by an additional factor of 10. It also shows how zero-expansion can be tuned to a very specific temperature. 00:00 Intro 01:11 Thermal deformation of soda-lime glass and zero-expansion glass-ceramic 05:25 Making glass-ceramics from scratch is difficult 06:37 The idea behind thermal conversion 08:34 Flaw in the measurments done in the previous video 10:01 Thermal conversion setup and experiments including a "pump jam" 12:23 Conversion results Robax 17:17 Evaluation of Robax results 18:06 Conversion results for Ceran 20:16 Concluding remarks Some images were used from the Schott, Ohara and Corning websites: https://www.schott.com/en-gb/products/zerodur https://www.ohara-gmbh.com/en/products/clearceram.html https://www.corning.com/worldwide/en/products/advanced-optics/product-materials/semiconductor-laser-optic-components/ultra-low-expansion-glass.html The clip at 10:54 is intended to wake up those that fell asleep. It's based on Pump up the Jam by Belgian techno pioneers Technotronic. We desparately need a revival of their video artwork! https://www.youtube.com/watch?v=9EcjWd-O4jI I made 20 second remix of the song assuming it is fair use. In case of problems, contact me and we'll sort it out. Telescope mirror image, courtesy of ESA: http://www.eso.org/public/images/recoating-ut4/ End tune: More to Light (Trippy Joint Remix) - Early Birds / JJM Vleggaar Please let me know if I forgot to mention someone.