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This topic is offered for NewMars members who might wish to contribute to a collection of links and text about the material.
The topic comes up as kbd512 and others attempt to figure out how to design a propulsion system able to (somehow) direct solar energy (photons) onto a system to heat hydrogen gas.
Google came up with a large collection of snippets. It appears that quartz melts at a temperature on the order of 1670 Celsius or 1713 Celsius.
what is the melting point of quartz used for heat measurement in industrial equipment
Birefringence +0.009 (B-G interval)
Pleochroism NoneMelting point 1670 °C (β tridymite); 1713 °C (β cristobalite)
Solubility Insoluble at STP; 1 ppmmass at 400 °C and 500 lb/in2 to 2600 ppmmass at 500 °C and 1500 lb/in2
28 more rows
Quartz - WikipediaWikipedia
https://en.wikipedia.org › wiki › QuartzPeople also ask
What is the melting point of quartz?
What is the thermal coefficient of quartz?
What is the thermal resistance of quartz?
What is the melting point of fused quartz?
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Exploring the Melting Point of Quartz GlassQuartz Solutions
https://quartz-solutions.com › blog › melting-point-qua...
Quartz glass typically has a melting point of around 1650°C (3000°F), making it significantly higher than most conventional glass compositions.
Fused quartzWikipedia
https://en.wikipedia.org › wiki › Fused_quartz
For you
Fused quartz as an industrial raw material is used to make various refractory shapes such as crucibles, trays, shrouds, and rollers for many high ...
Properties of Fused QuartzTechnical Glass Products
https://technicalglass.com › technical-properties
Properties of Fused Quartz ; Thermal Conductivity (20°C), 1.4 W/m °C ; Specific Heat (20°), 670 J/kg °C ; Softening Point, 1683°C ; Annealing Point, 1215°C.
Melting properties of quartz and their effect on industrial Si ...ResearchGate
https://www.researchgate.net › publication › 34121472...
Earlier work by this method showed that a quartz particle had to be heated above the melting temperature of quartz of around 1720 C before it was completely ...
What Is The Melting Point Of Quartz? Key Insights For High ...Kintek Solution
https://kindle-tech.com › faqs › at-what-temperature-wil...
The melting point of quartz is 1670°C (3038°F). This is the temperature at which quartz transitions from a solid to a liquid state. This value is consistent ...
Why Quartz Glass?MSE Supplies LLC
https://www.msesupplies.com › blogs › news › why-quar...
Jul 4, 2024 — High-Temperature Applications: Quartz glass can withstand high heat conditions up to 1,200°C and beyond, which can be effective in high- ...
Influence of Thermal Stability of Quartz and the Particle ...Oriental Journal of Chemistry
http://www.orientjchem.org › influence-of-thermal-stabil...
The traditional method for determination of thermal stability of quartz includes heating it in a furnace to a temperature of 13000C and keeping siliceous pieces ...
Quartz - an overviewScienceDirect.com
https://www.sciencedirect.com › chemical-engineering
7.2.3 Heat resistance. Being a glass, vitreous silica softens progressively as it approaches its melting point of 1713 °C. The maximum recommended working ...
Quartz Glass: A Versatile Material for Modern Applicationsglassforum.org
https://glassforum.org › Glass Types
Apr 26, 2023 — Quartz glass has an extremely high melting point of around 1713 degrees Celsius, making it suitable for high-temperature applications. It can ...
For reference, 3000 Kelvin is 2726.850 Celsius.
3000 Kelvin is the exhaust temperature of hydrogen emitted from NERVA
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Quartz has been chosen as a material "of interest" for the Focused Solar Optical Plane Deep Space vessel in discussion in early 2025.
Google came up with this (to me surprising) report:
Can quartz be melted and shaped?
The quartz sand is melted in a tungsten crucible that contains electrical heating elements; the fused material flows down from the crucible through a bottom mould where it is shaped into tubes, plates and rods.
This appears to support a vision of enclosing a heating chamber with quartz, so that photons can be admitted to the heating chamber without melting the material through which they are passing, or so that the heated gas inside the chamber does not melt the window.
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The nuclear light bulb version of gas core nuclear fission rockets had a nested pair of quartz cylinders as its engine chamber. The cold liquid hydrogen flowed between them, getting heated on its way to the nozzle, by the uranium gas fireball inside the inner cylinder. This was late 1950's early 1960's design concept work. The materials and technologies were never finalized.
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GW Johnson
McGregor, Texas
"There is nothing as expensive as a dead crew, especially one dead from a bad management decision"
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