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Questions tagged [glass]

This tag is for questions relating to glass materials and properties. DO NOT use this tag for questions about glassware.

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35 votes
3 answers
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Why isn't 'chemically-strengthened glass' made with potassium carbonate to begin with?

Instead of making potassium-strengthened glass by creating ordinary soda-lime glass first, then replacing the sodium atoms/ions with potassium by putting the glass in a bath/solution of potassium ...
Kurt Hikes's user avatar
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32 votes
2 answers
3k views

What makes Gorilla Glass more durable with each generation?

Gorilla Glass (GG) is one of the most recognizable brands of toughened glasses today, thanks to their marketing and widespread usage in various gadgets and automobile industry. According to Wikipedia,...
andselisk's user avatar
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22 votes
2 answers
11k views

Why is sand, sand; and why is glass, glass; While both mainly contain Silicon Dioxide?

I know that there is the famous process of heating material and converting them to glass; but what I don't know is, what is the chemical process of the creation of glass? Is it crystallization? How ...
M.A.R.'s user avatar
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14 votes
2 answers
2k views

Can glass be deionized?

Is there a chemical treatment that could remove sodium and calcium ions from the surface of soda-lime glass to turn it into quartz glass, increasing the hardness?
Francis L.'s user avatar
  • 1,480
12 votes
2 answers
602 views

Can olivine be used to make glass?

This concerns ongoing work to find a plausible approach to large-scale production of clear glass on the Moon. It's for an ultra-hard science fiction project and I really want to get it right. Olivine ...
kim holder's user avatar
11 votes
1 answer
22k views

How does HF dissolve glass?

By what mechanism does HF proceed in dissolving glass? Why is it the only acid that has this capability? Is it because of the small size and high electronegativity of fluorine?
user avatar
10 votes
1 answer
703 views

Why does automotive glass shatter into tiny pieces but glass used in our houses into shards?

Image Source : Bigstockphoto Image source : pinterest The first picture depicts the glass that is found from an accident site, while the second picture depicts the glass that we use in our home. ...
Akash. B's user avatar
  • 421
10 votes
1 answer
310 views

Can glass be made with anorthite?

The lunar highlands are made mostly of anorthosite (90% anorthite, the rest oxides of magnesium, iron, a little titanium, and traces of others), and pretty pure anorthite ($\ce{CaAl2Si2O8}$) is common....
kim holder's user avatar
9 votes
2 answers
6k views

How to quickly cool a test tube without cracking it?

Is there a way to safely cool a heated test tube quickly without cracking it due to sudden thermal stress in the glass? One thing that I tried was blowing on it, cooling it in slightly lukewarm water ...
user80551's user avatar
  • 400
9 votes
1 answer
2k views

Gold Plating on Glass?

I am considering labware options to handle NaOH solutions at ~150 °C. One appealing idea would be to coat my current glassware with gold. I've read different sources mentioning the possibility without ...
Hans's user avatar
  • 1,097
8 votes
2 answers
202 views

Why don't oils use plastic droppers?

As shown in the picture, most cosmetic oils and serums make use of glass droppers. However in the chemistry lab, scientists often also use reusable plastic droppers as well. My question was that, ...
Ronith's user avatar
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8 votes
1 answer
167 views

Materials used in metallic glass

I've been looking over the lists of materials used together to make metallic glass. Is it purely coincidental that if you round up/down any decimals from the atomic weight of elements used to ...
Everett's user avatar
  • 191
8 votes
1 answer
3k views

Identifying a glass frosting chemical

I have purchased an "unknown" white coloured powder from the market which can frost glass objects. Here are some properties of this powder White in colour When mixed with HCL or water, it results in ...
Rupin's user avatar
  • 191
8 votes
4 answers
5k views

Is glass an amorphous solid or supercooled liquid?

I have been informed that glass is a super-cooled liquid and is also considered to be an amorphous solid. Can it be both and, if not, what category does it fall into?
Prabhdeep Singh's user avatar
7 votes
2 answers
10k views

How to identify a blow-out pipette?

Is my pipette a blow-out pipette? I suspect that it is a blow-out pipette, though the double lines aren't rings. My guess is it is a TC blow-out pipette. It's a big 50 mL pipette, longer than my arm. ...
user1095108's user avatar
7 votes
1 answer
4k views

Why does glass shatter when heat is applied to it?

When I poured hot tea into a cup, the cup shattered after about three seconds. The cup was made of glass. It was pretty thin. How did the glass and the tea react in terms of chemicals. This is a bit ...
user3175999's user avatar
7 votes
1 answer
2k views

What is wrong with storing deionized water in glass containers?

I have heard that in general storing deionized water in glass bottles is ill advised and that it is better to use plastic. Additionally this is especially important for water used in ICP. I have ...
A.K.'s user avatar
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7 votes
1 answer
2k views

Materials that resist adhesion with molten glass even when hot

I'm looking for ways to manipulate molten glass with (e.g. bending a heated glass tube). This article mentions that oxides tend to adhere, hence molten glass to heated stainless steel. What ...
Jodes's user avatar
  • 461
7 votes
1 answer
5k views

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 ...
la.vie.en.rose's user avatar
7 votes
1 answer
226 views

Does aluminium dissolve in soda glass?

Specifically, if a piece of aluminized glass is heated to the melting point of the glass will the coating dissolve into it or otherwise react with it?
Dirk Bruere's user avatar
  • 1,600
6 votes
2 answers
1k views

Can we make glass by heating Martian Soil

I was puzzled by a very interesting question. Can we heat up Martian soil and produce glass just the way we do here on Earth? (the basic way) For info, Martian sand consists of the following - $\ce{...
Gajanand Jha's user avatar
6 votes
0 answers
2k views

Can a solid be both crystalline and amorphous? [closed]

The first line in the Wikipedia article for "Glass" reads: Glass is a non-crystalline amorphous solid that is often transparent and has widespread practical, technological, and decorative ...
paracetamol's user avatar
  • 18.7k
5 votes
2 answers
255 views

Understanding the molar free energy to simulate phase separations (Na2O-SiO2)

I am a mathematician and I want to understand the molar free energy model given in Kim and Sanders (2020) Equation (1), that is, \begin{equation} f(c,T) = RT \big(c \log(c) + (1-c) \log(1-c)\big) + \...
Henning's user avatar
  • 193
5 votes
1 answer
269 views

What home products are reactive with glass?

Glass seems to be one of the most stable solid substances - which chemicals, particularly home products that react with glass?
Blake Angelo's user avatar
5 votes
1 answer
802 views

Is the surface of glass a fine layer of silanol?

Today we learned in class through a vivid demonstration that water sticks to glass. We were then taught that water sticks to glass because while glass is mainly composed of silicon dioxide, the ...
user53356's user avatar
5 votes
2 answers
5k views

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 ...
Ed Perry's user avatar
5 votes
1 answer
8k views

Prevent molten glass from cracking when cooling down

My mother works in a ceramics workshop. Besides giving lessons she creates various ceramic dishes, cups and plates. She often uses the effect of colored glass melting in the product and then leaving ...
Tomáš Zato's user avatar
  • 2,478
4 votes
4 answers
18k views

Melting point of obsidian

I have tried 4 experiments at various temperatures to melt obsidian. At varying temperatures it just bubbles up and I don't seem to reach a melting point. Do you know what gases obsidian might ...
Jill Goddard's user avatar
4 votes
1 answer
4k views

Why is sand/glass polar? How does lattice structure change polarity?

The molecular geometry of sand is linear. Dipole moment is thus cancelled. But we all know from the meniscus water makes with glass that the dipole-dipole/H-O attraction between sand and water is ...
user134789's user avatar
4 votes
2 answers
395 views

Will borosilicate glass absorb 808nm laser light?

Will borosilicate glass absorb 808nm laser light? If it instead refracts, then what is the refractive index? Also, will borosilicate reflect lower frequencies of light like those used in non contact ...
user avatar
4 votes
1 answer
2k views

How should you report measurements and uncertainty for a measuring cylinder with 0.5 mL graduations?

I understand that a common convention is to report the uncertainty of an analogue instrument as plus or minus half of the smallest scale division. By this logic, a measuring cylinder with $\pu{0.5 mL}$...
Vandelay's user avatar
  • 135
4 votes
1 answer
1k views

Do xenon di- and tetrafluorides react with glass?

A question came in my test asking which of the compounds are not stored in glass. The answers were $\ce{HF},$ $\ce{XeF6},$ $\ce{XeF4},$ $\ce{XeF2}$. I know about $\ce{HF}$ and $\ce{XeF6},$ but not ...
Shubhraneel Pal's user avatar
4 votes
2 answers
4k views

Benefits of a Buchner funnel w/ a fritted disc instead of Quantitative Filter Paper Circles

I was wondering if someone could enlighten me on some example us cases where one would be better of using a Buchner funnel with a fritted disc (example), as opposed to a Buchner "style" filter (...
Justin's user avatar
  • 263
4 votes
0 answers
52 views

How can glycerol make glass objects 'disappear'?

There's a famous experiment that uses glycerol (glycerin) to make glass objects 'disappear'. A glass object becomes nearly invisible when filled with glycerol and immersed in a container of the same ...
Nitrogen-8's user avatar
4 votes
0 answers
110 views

How to estimate the mobility constant and the surface energy parameter in the Cahn-Hilliard equation?

As a mathematician, I want to simulate phase separations with the Cahn-Hilliard equation $$ \frac{\partial c}{\partial t} = M \Delta \bigg(\frac{\partial \mu}{\partial c} - \kappa \Delta c \bigg), $$ ...
Henning's user avatar
  • 193
3 votes
1 answer
8k views

Why is xenon hexafluoride not stored in glass?

Why is $\ce{XeF_6}$ not stored in glass containers? Isn't the reason glass is used for most acids is that it is non-reactive?
prog_SAHIL's user avatar
3 votes
3 answers
4k views

Does crystalline glass exist?

As far as I know, glass is a non-crystalline amorphous solid. Does glass exist in crystalline forms? Or is it the definition of glass that it's non-crystalline, in which case my question is based off ...
Etheryte's user avatar
  • 260
3 votes
3 answers
286 views

Carbon in Glass - XPS Analysis

I was reading a paper and found this elemental XPS analysis of an unmodified microscope glass slide surface. C (1s): 17.7% Si (2p): 28.47% O (1s): 53.83% It seems strange for a piece of normal ...
Raul Luciano's user avatar
  • 1,361
3 votes
1 answer
202 views

What reaction could rubidium undergo in a vacuumed chamber with Macor ceramic and glass?

In the center of the chamber on the photo below you can see the hexagonally-shaped Macor glass-ceramic consisting of Silicon dioxide $\ce{SiO2}~46\%$ Magnesium dioxide $\ce{MgO}~17\%$ Aluminum ...
Saesun Kim's user avatar
3 votes
1 answer
502 views

How to identify lead crystal glassware?

I would like to identify if a wine glass is made of lead crystal (a destructive method is allowed). Lead crystal is said to be eroded by dishwasher detergent. I don't have a dishwasher, what causes ...
jkien's user avatar
  • 131
3 votes
1 answer
2k views

Dropping Borosilicate glass mug

I recently got a glass tea mug. It's has double wall construction with a vacuum insulation (advertised as such). I noticed on the label, it specifically mentioned it's made of borosilicate glass, and ...
CDspace's user avatar
  • 159
3 votes
2 answers
8k views

Glass with a low melting point?

What kind of glass can I purchase that will melt in a Bunsen burner flame? Is there any way to treat glass such that the melting point is lowered? I tried adding some sodium hydroxide but the glass ...
Brinn Belyea's user avatar
  • 3,858
3 votes
1 answer
57 views

Are there distinct phases of amorphous ice?

Amorphous ice is a solid phase of water that lacks crystal structure. It is stable below about 150K, above which it converts to crystalline ice. There are four phases of amorphous ice: low medium, ...
Kevin Kostlan's user avatar
3 votes
1 answer
943 views

Devitrification vs glass transition temperature

This graph comes from a so-called "differential thermal analysis". It is studying the effects of temperature on glass. I don't understand what the difference between "glass transition" and "...
DLV's user avatar
  • 813
3 votes
0 answers
191 views

Remove sticky PDMS from glasses slides

I prepared some PDMS mixing a Sylgard 186 (elastomer) and a curing agent with 10:1 ratio. I sucked all the bubbles and I sandwiched the PDMS between two glass slides to get flat surfaces. Finally I ...
Mickey Martini's user avatar
3 votes
0 answers
382 views

Does soda-lime glass contain carbon?

Soda-lime glass is made by melting together soda (sodium carbonate), lime (calcium oxide), dolomite (calcium magnesium carbonate), silica (silicon dioxide), alumina (aluminum oxide), and small ...
Metamorphic's user avatar
2 votes
1 answer
88 views

Cold process to make glass

Since glass is a mix of silicates of sodium and calcium produced by heating or fusing together $\ce{Na2O}$ (Lewis base) with sand or $\ce{SiO2}$ (Lewis acid). Since $\ce{Na2O/NaOH(aq)}$ is a strong ...
Aryan Gupta's user avatar
2 votes
2 answers
3k views

Can hydrofluoric acid etch glass at a pH of 7.0?

Will it still etch glass when very dilute? Will the reaction still proceed slowly? At what pH will the reaction stop completely? From Wikipedia on hydrogen fluoride: "Although hydrofluoric acid ...
user1491819's user avatar
2 votes
2 answers
278 views

Does K2CO3 react in minute amounts with glassware at higher temperatures?

At a temperature of $\pu{750 ^\circ C}$, $\ce{K2CO3}$ and $\ce{SiO2}$ react with each other in substantial proportions, forming $\ce{K2SiO3}$ and $\ce{CO2}$ in the process$\ce{^{[1]}}$. We all know as ...
Hans's user avatar
  • 1,097
2 votes
1 answer
230 views

E-glass degradation in water

At the moment, a question puzzling me is why and how glass fibers degrade in water environment? As the degradation of the glass fibers occurs, its reduces the strength of them. As far as I know, the ...
A. Krauklis's user avatar