Chemistry Stack Exchange
Chemistry Stack Exchange

Questions tagged [materials]

Material is a general term for a chemical substance or a mixture of substances with certain, well defined physical properties.

Material is a general term for a chemical substance or a mixture of substances with certain, well defined physical properties.

Materials sciences, also known as materials engineering, is an interdisciplinary field (mostly between chemistry and physics) that is focused on designing materials with new properties, or new processes to produce materials.

Common, prominent classes of materials are metals, glasses, ceramics, semiconductors, composites, and plastics. In recent years a main focus was .

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What gas has the highest refractive index?

Coming from this answer on the Worldbuilding stack, I'm trying to find a gas with a high refractive index in the visible light wavelengths. The highest index on this site, is chlorine at 1.000773. Is this the highest a gas can be? Or is there a…
Dubukay
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What is "Steel Reinforced Epoxy"

No, it's not epoxy for reinforcing steel. It's "steel reinforced epoxy." http://www.jbweld.com/products/j-b-weld-twin-tube How in the world does steel reinforce epoxy? I can understand how carbon nanotubes dispersed in epoxy can help strength it,…
Dissenter
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What new material is D3O?

I am a PhD student in materials engineering. What is D3O? It is not a chemical, but rather a "polyurethane energy-absorbing material" (from Wikipedia). I would wish to know and study the chemical composition of this impact shock absorbing materials.
diana
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What's wool made of?

For example, silk is made of fibroin. But what's wool made of?
Sparkler
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(At what temperature) can salt evaporate?

Related to my previous question, can sodium chloride evaporate, and if so, at what temperature? Since salt is a solid, and apparently all substances can at various temperatures exist as liquids and vapors as well as solids, salt should also have a…
George A. Solodun
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Is there an otherwise liquid material that has angle of repose?

I wonder whether there is a material which consists from individual molecules (that is, fluid), which has its angle of repose thus exhibiting propertes of a powder?
Anixx
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Why are 720 nm LEDs so uncommon?

Disclaimer: Potentially more of a physics question, but this area is muddy. I'm trying to find 720 nm LEDs but they're proving to be very uncommon. In fact, there seems to be a gap between 660 nm up to ~730 nm. I've only been able to find one…
wes3449
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What is cheap material that absorbs water in packaging?

I am thinking cheap material that can be used between two layers of carton that absorbs water. I want to use air but I still think that there may be other materials available that absorb water can be easily removed when the outer carton layer is…
Léo Léopold Hertz 준영
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Making Lyophilized Cake Lookalike using household ingredients

I'm working on a machine learning model to identify flaws in vaccines in lyophilized cake form. To train the model, I need a number of samples that look something like this: I have vials, but I'm having trouble making a suitable cake – I need…
Nolan Amy
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Is phenolphthalein used in laminar wood construction panels?

Recently someone is claiming that the laminar wood panels used for building our new primary school contains a "carcinogenic and dangerous compound", namely phenolphthalein. I couldn't find any evidence of it being used as that on the net. Could you…
Metiu
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What material is an Inkjet transparent printing film (slide) made of?

I don't mean photographic film/film base but rather the A4/Letter sheets of transparent film that were used in slide projectors during lectures. For example see this.
Sparkler
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Solid materials with dipolar molecules

I am trying to heat solids using controlled microwave radiation and I am therefore looking for materials that absorb microwaves well. I have understood that for radiation in the radio frequency and microwave frequency regimes the polarity of…
x3b7z99
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How are chemistry and materials science related?

I'm currently a chemistry major and now I am considering doing a minor in materials science. Before making a decision, I would like to know how the two disciplines are related and what are their differences such as techniques, approaches, emphasis,…
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Accurate way to tell a material is PP with easily available means?

Sometimes even though certain products that I bought come with a "PP 5" marking on it, I suspect it may not be the case, so I wanna know, is there a relatively safe and accurate way to tell if certain material is really Polypropylene, with easily…
VictorCharlie23
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What kind of building materials could be synthesised from basalt?

Building tall cities is made possible by the invention of concrete with steel rebar which has much more tensile strength than any other massively available material that I am aware of. Cement (the most crucial ingredient) is made by processing…
Lorry Laurence mcLarry
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