Sitall
id:
sitall-320-17497709
title:
Sitall
text:
Sitall is a crystalline glass-ceramic with ultra-low coefficient of thermal expansion (CTE). It was originally manufactured in the former Soviet Union and was used in the making of primary mirrors for the Russian Maksutov telescopes, but since dissolution has diminished in quality. It has a CTE of only 0 ± 1.5×10−7 °C−1 in the temperature range −60 to 60 °C, placing it in a small group of transparent materials with low CTE such as Vycor, Zerodur, Cer‑Vit and fused quartz. Materials of low coeffi
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Sitall
date created:
date modified:
2023-01-19T04:15:06Z
main entity:
{"identifier":"Q7531629","url":"https://www.wikidata.org/entity/Q7531629"}
image:
fields total:
13
integrity:
13