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

learn more… | top users | synonyms

1
vote
0answers
12 views

Interaction between metalic nanoparticles and aggregation

I can't find any publication to deal with aggregation of colloidal metalic nanoparticles. What type of interaction(s) is/are there between aqeous metalic nanoparticles which give(s) rise to ...
0
votes
0answers
12 views

transparent plate that hardened resin won't stick to

What kind of materials are there available that will be transparent (at least 80% light should pass through) for 365 nm UV that would not stick to hardened resin? I am building a 3D printer that ...
3
votes
0answers
26 views

Chemistry of Stripper Poles: How much weight can different materials support? [closed]

I'm looking to create a light up dancing pole. This requires a translucent material that is strong enough to support the weight and force of a human being, even when it's hollowed out to so LEDs can ...
2
votes
1answer
34 views

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 ...
6
votes
0answers
37 views

How does epoxy stick to stuff?

According to Wikipedia what gives epoxy it's holding power is apparently "ionic" interactions between the epoxy and the surface. But I thought that epoxy was overall neutral when cured. How can it ...
2
votes
1answer
27 views

How does “breathable” siloxane water sealant work?

(This is an interdisciplinary question, between molecular chemistry, materials science & construction. I think Chemistry SE is the right fit, but please move it if needed.) Silane/siloxane ...
2
votes
1answer
19 views

Etching a Screen Protector Film

I have to etch a pattern on a plastic film similar to the ones used to protect phone screens. I want a very thin etch, one that is only visible on close inspection. How can I get that done?
12
votes
2answers
105 views

Safety in handling of concentrated ammonium fluoride

I recently saw a protocol for extracting organic materials that are bound in the silica matrix formed by diatoms. The extraction protocol used 10 molar ammonium fluoride ($\ce{NH4F}$). I briefly ...
1
vote
1answer
28 views

Permanent Balloon?

Is it possible to create a container for helium that it can't permeate through, like a permanent balloon? Or, if not, what kind of material would have the lowest permeability for that application? I ...
0
votes
2answers
20 views

which method can be applied to separate ferrofluid liquid from oil?

I am 2nd year mechanical engineer student. Wanna know is there any substance,liquid or any other stuff to separate ferrofluid from oil after mixing them... Please give me answers..
3
votes
1answer
133 views

What does delta letter mean in some ceramics chemical material formula?

Here is a given chemical formula for ceramic material: La0.6Sr0.4Fe0.8Ni0.2O3-δ There is a letter δ. What does it stand for? I guess it is something about oxygen vacancies in crystal lattice.
4
votes
1answer
32 views

How to take water-dispersed PEDOT:PSS and disperse it in an organic solvent?

I am doing a science fair project on OLEDs. I am testing whether polypyrrole can be used as an emissive layer in a 2-layer OLED. The polypyrrole I am synthesizing is water soluble, and will be ...
4
votes
1answer
69 views

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?
0
votes
0answers
17 views

How do I obtain PDF/ICDD/JCPDS?

I'm having trouble finding JCPDS of a material. I'm specifically looking for Na-titanate.
5
votes
1answer
139 views

What's wool made of?

For example, silk is made of fibroin. But what's wool made of?
3
votes
0answers
39 views

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.
4
votes
1answer
49 views

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 ...
1
vote
0answers
28 views

How paper-tag survive in the dry-cleaning process?

This prevent the clothes from being ruined by ink on the paper tag. To put the garments attached with this paper through the whole process of dry-cleaning, I have the questions listed below paper ...
34
votes
7answers
9k views

Is toothpaste solid or liquid?

My teacher didn't answer this properly: Is toothpaste solid or liquid? You can't say toothpaste is a solid because solid material have a fixed shape but toothpaste doesn't. However, you can say ...
2
votes
1answer
50 views

How can concrete set underwater?

I'm about to teach concrete to some high school children. I'm not a chemist but as I understand it the limestone cycle is this: ...
3
votes
1answer
68 views

what would happen if you got a full package of wet silica gel on your hand after it tore open? [closed]

I accidently opened a bag of silica gel and got it on my hand what will happen to my hand because now it kinda feels weird.
2
votes
1answer
57 views

Nuclear power: what material is the control rod made from?

My question: What type of material is used in the control rod of a nuclear reactor? (Nuclear power plant)
5
votes
2answers
221 views

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 ...
1
vote
0answers
23 views

What is the driving force for the growth of uniform size participates in a matrix?

What is the driving force for the growth of equal size participates in a matrix? For different size participates the concentration gradient between small and large particles is the driving force.
0
votes
0answers
37 views

short range order and long range order

what is the difference between short range order = 0 and long range order = 0 in disordered alloys? I just know the equation of SRO & LRO: SRD= (Pab-Pab random)/(Pab max-Pab random) ...
1
vote
1answer
40 views

Martensitic transformation in ceramics

What is the specification of Martensite (displacive) transformation in ceramics comparing to the metals? I just know about Martensite transformation in metals. For example, these transformations are ...
0
votes
0answers
24 views

coherent grain growth

What is the driving force for growth of coherent precipitates in the matrix? The driving force for growth of incoherent precipitates in the matrix is concentration slope between tiny and large ...
1
vote
1answer
28 views

How to study Sodium hypochlorite stability with materials

first of all I'm not not sure to be in the right stack exchange site, but I'm a material engineering student and this year I have a project: choose a material for a container filled with Sodium ...
0
votes
1answer
33 views

Can I change viscosity of an HDPE polymer?

I want to make composite with HDPE and wood, but when I melt it I have problem to mix them, because this polymer have high viscosity.
4
votes
1answer
313 views

Structure of carbon fiber

What is the structure of carbon fiber? Wikipedia doesn't give much insight. The atomic structure of carbon fiber is similar to that of graphite, consisting of sheets of carbon atoms (graphene ...
3
votes
0answers
72 views

What is the carbon footprint of a diamond?

I think it would be interesting and illuminating to calculate the carbon footprint (per carat) of diamond. The answer would undoubtedly be different for artificial (industrial grade) diamonds vs. ...
2
votes
1answer
165 views

New materials: What is D3O?

I am a phd student in materials engineering. Do you know D3O? I would know and study the chemical composition of this impact shock absorbing materials. Thanks for your answer
2
votes
2answers
238 views

Recrystallization and purification techniques for getting a pure sample

Could someone explain in detail as to why exactly recrystallization gives a more pure solid solid sample? As well as why is would be better 'technique' to allow for the crystal to form slowly? I was ...
1
vote
1answer
87 views

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 ...
0
votes
0answers
48 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 ...
0
votes
1answer
96 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 ...
4
votes
1answer
118 views

Is graphene chemically reactive?

I've been looking around, and found some sites saying it is, and some saying it's not. Can someone clarify this? If it's possible, can someone explain why it is (or not) chemically reactive?
0
votes
1answer
61 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 ...
1
vote
1answer
74 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, ...
2
votes
1answer
181 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 ...
1
vote
1answer
132 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 ...
2
votes
2answers
103 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?
1
vote
1answer
41 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 ...
13
votes
7answers
2k views

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 ...
9
votes
2answers
694 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 ...
1
vote
1answer
38 views

OFET vs Traditional Transistors

What is the advance of OFET's (Organic Field effect transistors) over the traditional CMOS Transistors?
4
votes
1answer
51 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 ...
4
votes
1answer
277 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 ...
2
votes
0answers
76 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 ...
2
votes
1answer
431 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 ...