Questions tagged [materials]
Material is a general term for a chemical substance or a mixture of substances with certain, well defined physical properties.
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What type of organic compounds are used in OLED technology?
I know that there are organic compounds that exhibit electroluminescence, and are those types of materials difficult to synthesize?
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Why do shape and size have the greatest effect on the optical properties of nanoparticles?
The LSPR properties of nanoparticles depend on a number of factors, including shape, size, material, crystal structure, dielectric environment, etc. However, it has been consistently shown that shape ...
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What is the difference between an amorphous solid and glass?
They are both formed when a liquid is supercooled rapidly, no free energy, and they both have irregular structures. What defines a glass other than how it is amorphous, transparent, and has a glass ...
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What is Nano Zinc Oxide?
First of all, I have zero chemical background, but I seek for an easy explanation about Nano Zinc Oxide.
I was told that the name of "Nano Zinc Oxide" couldn't possibly exist. Instead, it should be ...
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Is LiNbO3 a perovskite or not?
I am collecting a database of perovskite materials and could not decide if $\ce{LiNbO3}$ is categorized as perovskite or not. $\ce{LiNbO3}$ has been identified as a perovskite [1] as well as non-...
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How does graphite content affect the conductivity of pencil lead?
My peers and I started an experiment to test whether we could use the conductivity of a piece of pencil lead to determine its grade (that is, whether it is 2H, HB, 3B etc.). The paper Observational ...
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When styrofoam shrinks from pressure, why doesn't it go back to normal after decreasing the pressure?
In this article (https://oceanexplorer.noaa.gov/explorations/16carolina/logs/sep3-2/sep3-2.html) and articles like this one, Styrofoam cups were taken to the depths of the ocean in an AUV to ...
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Are there two compound resins that tolerate over 1000°C for glass/carbon fiber?
I'm a hobby enthusiast that loves to play with electronics so my major is not in chemistry, there for I'm hoping that this forum is the right place to find aid in this question.
I've searched day in ...
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What material properties are unpredictable (not reproducible) but can be measured consistently and at a low cost?
I'm looking for a process to create a material which has some easy to measure properties.
These properties should be consistent over a long period.
It should be very hard (expensive) to predict/...
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What piezoelectric materials can be made at home? [closed]
I would like to know a few examples of transparent materials which exhibit piezoelectricity and can be purchased online or synthesized at home with ease.
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Storing large quantities of KOH
I need to handle large quantities of $\ce{KOH}$; close to 1000 liters of 85 % conc $\ce{KOH}$ for about an hour. Any suggestions on how I go about doing it? Also the temperature during the process ...
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How can one test if a ruby is real?
My friend recently bought a ruby gem from a store and asked me how to test whether its an original one or a duplicate.
Are there any ways to test it using only domestic materials?
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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 ...
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Can uranium be used to color aluminium oxide based gemstones, and/or diamonds?
Re-hosting this question from Physics to Chemistry, lightly edited.
Rubies and sapphires are chemically equivalent to the mineral corundum, with the exception of transition metal impurities that ...
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Easily removable material that sticks to skin
I am looking for some kind of material that can be used to easily latch something to someone's finger. This is for a first year engineering project. The idea is to use this material to latch small ...
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What is the maximum amount of carbon atoms that can comprise a fullerene?
As the fullerene sum formula can be defined as $\ce{C_n}$ with $n$ being any even integer number, is there any fundamental theoretical limit as to how big $n$ can get?
If there is no limit to the ...
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Are there any molecular modeling programs that can build materials made up of three or more elements into a cylindrical shape?
I would like to build a material similar to what is in the image below.
I have tried programs such as Material Studio, Quantum ATK, and VNL, but most of them can only do materials with 2 elements.
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What, if any, are the differences between hemiwicking and wicking?
I'm encountering these two terms, but their uses seem to be different, and there's little documentation out there defining the terms.
Here is an example definition I've found of Wicking:
Wicking ...
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Density of Interstitial compounds
I have read in my textbook (not very reliable) that density of interstitial compounds is lesser than parent compound. But how can this be true?
We add atoms to the lattice voids, so density should ...
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What structural property creates stickiness?
Recently, me and my mom parked her car in a spot reserved for customers of a super expensive shoe store while going to get some also fairly expensive drinks at Starbucks. When we came back, an ...
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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 ...
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Thermophysical properties of liquid Galden LS 230 between 25 °C and 230 °C
I'm looking for thermophysical properties of Galden LS 230, a liquid polymer (PFPE) produced by Solvay (https://www.solvay.com/en/markets-and-products/featured-products/Galden.html) at temperatures ...
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Why I am unable to see any electrical conductivity in Permalloy nano powders?
We recently purchased some permalloy nano powders (Ni80Fe70Mo3) I checked the electrical conductivity of these powders using a multimeter which can measure resistance to the order of giga ohm's. I was ...
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What are some materials that expand a lot proportionally to heat?
There's never any source on the internet that can simply give me a list of materials that have the kinds of properties I'm looking for. I'm wondering what materials, like for a solid block of ...
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Why is FEP transparent and PTFE not?
fluorinated ethylene propylene (FEP) is close relative of poly(tetra-fluoroethylene) (PTFE), both only contain fluorine and carbon atoms,both have very similiar properties yet FEP is relatively ...
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Chemical plating of glass with copper?
It is commonly known how to plate glass with silver using silver nitrate, ammonia and glucose.
With about the same effort, is there a way to plate glass with copper?
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Is graphene chemically reactive?
Different internet sources say different things.
If possible, can someone explain why it is (or isn't) chemically reactive?
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Why plastic sheets contract when heated?
Why do thin plastic sheets contract when heated, contradictory to the behavior of most other materials ?
What are the things going on at the molecular level ?
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Do dark lines on porcelain dishes indicate usage of aluminium for the color?
"I heard" that gray lines forming on porcelain indicate usage of aluminium in the coating. I would primarily like to verify this information.
Bowl #1 and bowl #2 have been used both for several ...
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What is the plastic material of the CD cases?
What is the material of which the transparent part of CD cases are made of? It is nicely rigid and really lightweight.
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Examples of electronically conductive foods?
There are many foodstuffs that are ionically conductive (for example, anything moist and salty). What about foods that have a high electronic conductivity?
The only thing I can think of would be ...
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What is the naming convention for Sn and Pb in inter-metallic compounds?
How would one go about naming inter-metallic (specifically, transition post-transition) compounds containing tin and lead?
It is usually easy figuring out the naming of such compounds as they follow ...
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Phospors and Phosphorus
I'm not a chemist.
I understand that phosphorus comes in multiple forms, one of which is white, volatile, and highly toxic. I know that phosphors come in multiple chemical forms, two of which are ...
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What is the meaning of a decimal in a subscript in a chemical formulas? [duplicate]
What is the meaning of a decimal in a subscript in a chemical formulas?
I came across the fractional subscripts in a publication,[1] for example:
We introduce oxygen into a ferromagnetic metallic ...
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How are piezoelectric crystals made?
I want to know how the powdered formed of piezoelectric material is converted to crystal like used in quartz watches. I know that some more chemicals are mixed with the material and then it is pressed ...
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What is so special about quasicrystals?
Can whatever is special about quasicrystals be understood at A-Level standard or slightly above it? The material I saw online is either too layman or too advanced for me to follow. What practical uses ...
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What chemical should I use to thin UV cure epoxy?
The epoxy that I am working with is UV curable with a cycloaliphatic epoxy resin base. I am trying to reduce the viscosity. Whatever I add to thin the epoxy, it needs to be able to evaporate off so ...
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How does salt dough work?
Sorry for coming in here with little chemistry knowledge and a pretty inane question, but my googling skills have completely failed to cut through the enormous combined output of the baking brigade ...
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Difference between neutral and basic activated alumina
Sigma Aldrich sells two different types of activated alumina for column chromatography: neutral and basic.
Apparently basic alumina is more active and better at adsorbing anions.
Why is this the ...
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Can a vacuum on a closed system really “pull” things out of it?
So I’m learning gas discharge tube making (neon) and there’s a step where you cork one end of the tube and pull a vacuum on the other end to suck out all the impurities. The same thing was done when I ...
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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 ...
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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 ...
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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?
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What is the chemical composition of a Rubbermaid Roughneck container and is it feasible for me to make my own molds?
I'm looking for more information on the composition of a Rubbermaid Roughneck container. The description says "Roughneck containers are made with a durable polyethylene material for a lifetime of ...
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Why n-alkanes can be found in organic solvent extract of rubber?
Sorry for the confusing title, I didn't know how to describe this better. So, if we douse rubber, say, a bicycle tire or a certain type of rubber glove, with organic solvent (n-heptane), we can find n-...
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What material is used in coating these aluminum containers for the food industry?
What is the material used to coat (some might use the term 'lacquer') disposable aluminum containers in the food industry? And can it be removed in a safe way (for the environment) with 'home methods'?...
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What type of gloves should be used while diluting sulfuric and hydrochloric acids?
What type of gloves should we use on hands while diluting sulfuric and hydrochloric acid?
Can we use these gloves in chemistry lab to handle other acids?
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Harnessing phase separation to easily make Li film
I want to make a thin, smooth film of pure lithium in a glovebox.
In general, I think that I can use a phase separation approach. I will heat a bath of mineral oil above Li's melting point, then ...
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Is there a difference between Close Cubic Packing and Face Centered Packing?
I see some places use close cubic packing (ccp) and face centered packing (fcp) interchangeably. Are they the same thing? Does one provide more information than the other?
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