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

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Enclathrated - definition?

When discussing the solvent uptake of a metal-organic framework would the correct term be "solvent molecules were enclathrated into the pores"? Despite searching for a definition online I have drawn a ...
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47 views

Is it dangerous to live near lead? [duplicate]

Several month ago, I soundproofed the door of my room with two sheets of lead. Can it be dangerous to live with them for many years? Can lead "decay" in some way and be inhaled? (and what happen when ...
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33 views

How to temper a non-ferrous metal

Can non-ferrous metals/alloys (copper, brass, bronze) be tempered (made harder) by temperature control alone, like ferrous metals? I understand it's simple to anneal copper, brass, etc., just by ...
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23 views

Carburizing Calculation

The problem is stated as follows: The surface of a steel gear made of 1022 steel (0.22 wt% C) is to be gas-carburized at $927$ °C. Calculate the time necessary to increase the carbon content to 0.30 ...
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30 views

Fick's Second Law of Diffusion

In the book "Foundations of Materials Science and Engineering" (Smith and Hashemi) the following is written: For cases of non-steady state diffusion in which diffusivity is independent of time, ...
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132 views

A semi-transparent material that is a solid

I am trying to find something I can get the ingredients for and make that starts out a liquid and sets into a solid. My end goal is to create a simple 8bit art figure so I want to pour it into a mold ...
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36 views

Why does gallium nitride allow an AESA radar to be more powerful than a radar with elements made of gallium arsenide?

AESA (Actively Electronically Scanned Array) radars use thousands of individual transmit/receive elements to create a radar. All in service AESAs use gallium arsenide as the material in the t/r ...
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2answers
57 views

Why do different impurities create different colors in diamonds?

Traces of nitrogen make diamonds yellow while traces of boron make them blue. What accounts for the differences in color for a given element?
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37 views

Which material to use for athletic accessories?

I'm looking for some guidance in selecting the right material for dance shoes heels and women's self-defense accessories. I'm looking for a material that 1) has a superb strength-to-weight ratio, can ...
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How to solidify sand

I'm doing a research project where we analyzing the structure of sand after a certain process. To get a better idea of the internal structure of the sand, we use different colors to visualize the ...
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242 views

Which is the densest gas known?

Which is the densest gas known to exist under normal "shirt sleeve" conditions: room temperature, one atmosphere, won't explode on contact with air, won't kill everyone in the building in trace ...
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12 views

OFET vs Traditional Transistors

What is the advance of OFET's (Organic Field effect transistors) over the traditional CMOS Transistors?
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44 views

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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136 views

Length of copper wire in 1 lb spool

This is a homework question in my Hon. General Chemistry I class. Below this is the question, then below that is my work and answer explained as clearly as I could manage. Question: The diameter of ...
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46 views

Is superglue a good thermal insulator?

How good of a thermal insulator is superglue compared to other materials like ceramics, plastics, and metals? I know this might not seem like a chemistry question, but I was hoping someone here could ...
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1answer
400 views

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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49 views

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 ...
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50 views

Photoelectric Effect in Semiconductors

Is the photoelectric effect possible for semiconductors? I imagine that this might be, if possible, a two-photon process: excitation of an electron from a filled to conductance band, and then on to ...
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67 views

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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575 views

What makes teflon such a strong material?

I don't know much about polymers but recently teflon made me get addicted to study their properties and nature. As far as I know, the teflon polymer contains fluorine which is one of the most ...
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14 views

Polymer Crystallinity

See the following question: I think the answer is A because of the hydrogen bond in the side group, thus the degree of secondary bonding between parallel chain segments is higher. Is my thinking ...
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27 views

What is relationship between molecular weight distribution of PE and its strength?

I'm trying to figure out the relationship between the molecular weight distribution of a polyethylene plastic and its strength and heat sealability. (The molecular weight distribution is described ...
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44 views

How do you perforate a teflon sheet?

I have a sheet of thin unperforated teflon that I need to perforate by tomorrow for a lab I work in. None of my coworkers know how to perforate the sheet. Does anyone know how I can do this using ...
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1answer
49 views

What is some advance reference books about alloy that gives a lot historical background and applies a lot of theoretical equation or formulas

What is some advance reference books specifically about alloy that gives a lot historical background and applies a lot of theoretical equation or formulas with explanation? I seem to find nothing ...
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24 views

TiO2 nanotube application in cement

I am perparing for a presentation on the application of TiO2 nanotubes in cement which is a recent topic in cement chemistry. Do you happen to have any papers (or know of any accessible on Internet) ...
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42 views

What type of material is this and how is it corroding?

So I was thinking about corrosion and I came across this structure(see image) Do you think the inner metal/alloy that is corroding is steel? Also, what do you think the outer layer (in white) is? ...
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14 views

What is the correct temperature probe for a wet etch solution?

What type of probe or probe coating should one use to measure the temperature of a roughly 100c aqueous solution of cupric chloride? A stainless steel probe seems incorrect. Is a Teflon coated probe ...
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35 views

Generally available fluid with good heat transport properties

I have designed a container which is heated up and has to heat up some tube-coils of water inside of it. This container is filled with a fluid that can help store and transfer the heat received from ...
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50 views

Is the end of a cigarette on fire when lit?

Is the end of a cigarette on fire when it is lit? Or is it smoldering? Is there a chemical difference between the two?
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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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80 views

pH and materials selction

I working on the Navy study guide for their nuclear engineering programs and I am not a Chemist. Thus, I have come here to try and develop a better understanding of the subject matter. I am trying ...
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46 views

Change in pressure or volume of molten salt

I am doing a project in which I fill a cylinder with a volume of $636cm^2$ (made of stainless steel) with molten salt: 60% Sodium Nitrate ($NaNO_3$) and 40% Potassium Nitrate($KNO_3$). The container ...
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Vycor + hydrogen at 750°C - reduction?

Does anybody have experience with Vycor 96% silica tubing in hydrogen at bright red heat, around 750°C, regarding its reduction to silicon monoxide or elemental silicon?
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233 views

A Material that sticks to the skin, without adhesives! [closed]

I am onto a project for making knee braces for female anatomy, and I have been looking for a material, that i could line the pads with, that would stick to the skin of the players and still provide ...
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74 views

Why is the maximum % for a gold alloy 92%?

The assignment question is asking us to explain why you can't get more than 92% gold in a gold alloy, and I can't seem to find out why it's specifically 92% in either the textbook or online. Any ...
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Do these compounds Na$_x$IrO$_2$ and NaOsO$_2$ exist?

Based on some physics background, I want to know whether have we synthesized these two materials: $\ce{Na_{x}IrO2}$ and $\ce{NaOsO2}$ in the lab, if so, what properties do they have? I will be very ...
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51 views

What eco-friendly substance can I use to write and erase on a wall for UV glowing without detection in daylight?

I rent an office and want an alternative to a whiteboard and continual dry-erase marker purchases. I can shut out the light and use the surface under UV lamps only, that's fine. Commonly listed ...
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149 views

What type of sensor technologies exist to determine the chemical composition of a polymer?

Let's say I have several pieces of trash and each is made with a different type of material like: Plastic bottle : High Density Polyethylene (HDPE) Cereal box : Paperboard & Epichlorohydrin ...
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87 views

Chemistry Self Education [closed]

I want to learn chemistry. I did not have the benefit of studying it when I was in highschool, and I was always intimidated by it (I feel it's more rote memorization rather than understanding - I'm ...
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46 views

Rapidly cooling Aluminum vapour to solid state?

What sort of a microstructure would you get on bubbling Aluminium vapors through a large tank of Helium?Would it be a glassy microstructure and/or would you get nano-powders? and/or a new crystal ...
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183 views

A chemistry approach to environmentally friendly yoga mats… NBR, NR, TPE, PER [closed]

I'm currently seeking your expertise while creating a line of environmentally friendly yoga mats, and I apologize in advance if any chemistry knowledge of mine has been absent since college and I lack ...
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66 views

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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29 views

Common flame-retardant plastic film materials?

More questions for my DIY hot air balloon: What are some very common (i.e. easy to purchase) plastic film materials that have very good flame-retardant properties? How is the "degree of flame ...
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213 views

Have we ever created artificial metals?

I really don't know anything about chemistry, but I was wondering about the following vague question: has any substance been created that does not contain any metallic elements, but is metallic? In ...
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127 views

chemically inert molecule with piezoelectric properties

For a research project, I'm looking into existing chemical molecules that have the following properties: It is mostly chemically inert, safe for animals and children It exhibits piezoelectricity - ...
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48 views

Suitability of liquid plastic resin for plumbing application

Which synthetic resins are suitable for fabrication of plumbing components e.g pipe sections? I'm trying to find an easy way to mold/house/encase a custom designed data logger. The water temperature ...
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1answer
505 views

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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2answers
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Material that is flexible when cold but comes brittle when hot

I'm looking for a material that I can use to make a mesh netting. It should be flexible and have reasonable tensile strength when cold but brittle when hot (400+ degrees F). I want to use it to ...
2
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0answers
85 views

Consumer Report for Lab Equipment

I'm just wondering if anybody here knows of a Consumer-Report-like publication for lab equipment. Something that would give the specifics, as, for example, the flow rate of a distilling condenser, ...