Development of porous ceramic moulds for hot slumping of astronomical glass mirror substrates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00381961" target="_blank" >RIV/68407700:21230/25:00381961 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.oceram.2024.100712" target="_blank" >https://doi.org/10.1016/j.oceram.2024.100712</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.oceram.2024.100712" target="_blank" >10.1016/j.oceram.2024.100712</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Development of porous ceramic moulds for hot slumping of astronomical glass mirror substrates

Popis výsledku v původním jazyce

The key goal of this project was to develop a porous ceramic that could be used as a mould material for the heat bending of glass. Heat-bent - slumped - glass has a wide range of uses, from miniature lenses for smartphone cameras or elegantly shaped touch displays to precisely shaped mirrors. The project Pr & auml;BieD (Pr & auml;zisionsbiegen von D & uuml;nnglas, "precise bending of thin glass") brought together different stakeholders from the fields of science and industry. The outcome of their cooperation was an exemplary mould for shaping glass segments for the experimental Wolter I X-ray telescope. Compared, for example, to nickel (XMM) or Zerodur (Chandra), telescope segments of this kind could have a much lower weight and thickness, and therefore also a higher collecting area. The most important requirements in terms of the material area coefficient of thermal expansion close to that of the glass so as not to disturb the required shape during the hot slumping process, chemical and heat stability to prevent mirror contamination by outgassing during slumping, no adhesivity between the glass and the mould, porosity so that glass bending can be supported by pumping through the mould's surface, and the possibility to machine the surface with sufficient accuracy. This paper briefly describes the process of manufacturing ceramics and the features of the material developed as they are revealed during its evolution.

Název v anglickém jazyce

Development of porous ceramic moulds for hot slumping of astronomical glass mirror substrates

Popis výsledku anglicky

The key goal of this project was to develop a porous ceramic that could be used as a mould material for the heat bending of glass. Heat-bent - slumped - glass has a wide range of uses, from miniature lenses for smartphone cameras or elegantly shaped touch displays to precisely shaped mirrors. The project Pr & auml;BieD (Pr & auml;zisionsbiegen von D & uuml;nnglas, "precise bending of thin glass") brought together different stakeholders from the fields of science and industry. The outcome of their cooperation was an exemplary mould for shaping glass segments for the experimental Wolter I X-ray telescope. Compared, for example, to nickel (XMM) or Zerodur (Chandra), telescope segments of this kind could have a much lower weight and thickness, and therefore also a higher collecting area. The most important requirements in terms of the material area coefficient of thermal expansion close to that of the glass so as not to disturb the required shape during the hot slumping process, chemical and heat stability to prevent mirror contamination by outgassing during slumping, no adhesivity between the glass and the mould, porosity so that glass bending can be supported by pumping through the mould's surface, and the possibility to machine the surface with sufficient accuracy. This paper briefly describes the process of manufacturing ceramics and the features of the material developed as they are revealed during its evolution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Open Ceramics

ISSN

2666-5395

e-ISSN

—

Svazek periodika

21

Číslo periodika v rámci svazku

100712

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

001381337600001

EID výsledku v databázi Scopus

2-s2.0-85211182209