Questions tagged [glass]

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

32
votes
3answers
4k views

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 ...
5
votes
1answer
179 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 ...
1
vote
1answer
76 views

Cerium (CeO) behavior in Glass Polishing?

I am basically working in semiconductor industry and I specifically taking care of CMP (Chemical Mechanical Polishing). We did polish glass (borosilicate type of glass) and we are using slurry (which ...
2
votes
1answer
182 views

How does lime prevent soda lime glass from dissolving in water?

How does lime addition as an ingredient prevent soda lime glass from dissolving in water? Does it form calcium silicate in the process of melting?
1
vote
0answers
80 views

Copper Mirror Reaction

I would like to create a copper mirror on a plate of sandblasted glass. I know that a reaction exists: $$\ce{CuSO4 + N2H2 -> Cu + N2 + H2SO4}$$ I know that such a plate of copper is very weak. ...
4
votes
2answers
674 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 (...
10
votes
1answer
276 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. ...
0
votes
1answer
46 views

How does cullet reduce the production temperature in glass production?

In my book, I read that broken glass pieces are reused in the production of glass, known to be cullet. This on one hand saves the production cost and also reduces the production temperature. My ...
1
vote
1answer
134 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 ...
1
vote
1answer
2k 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?
2
votes
2answers
88 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 ...
5
votes
1answer
176 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 ...
5
votes
0answers
845 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 usage in, ...
2
votes
0answers
188 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 ...
27
votes
2answers
1k 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,...
4
votes
4answers
9k 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 ...
12
votes
2answers
295 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 ...
1
vote
1answer
108 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 ...
7
votes
1answer
140 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....
3
votes
1answer
160 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?
5
votes
2answers
2k 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 ...
2
votes
1answer
126 views

Can green vehicle antifreeze (Ethylene Glycol) be diluted in a glass container?

I picked up a container of undiluted green antifreeze, and oops, I don't have anything to mix it in! I do have a glass container though at the top of my recycling bin that is about a half gallon. I've ...
1
vote
0answers
54 views

Manufacturing coloured crystal glass using gold nanoparticles

I came across this video which shows how a crystal chandelier is made. I recommend that anyone reading this post should watch it; it is quite fascinating. Anyway, at about the 2:15 mark, the video ...
8
votes
4answers
3k 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?
3
votes
2answers
1k 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 is ...
2
votes
1answer
310 views

Does glass adsorb methanol to an exceptional extent?

Does (borosilicate) glass adsorb methanol to an exceptional extent? We are doing vapor density measurements of organic solvents using a microbalance and a sealed glass sphere. Other polar molecules ...
4
votes
1answer
536 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{...
2
votes
2answers
1k 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 ...
1
vote
1answer
189 views

Why can't two Silicon tetraoxide tetrahedrons share an edge or a face?

Our teacher told us about structural types of silicate minerals (neosilicate, sorosilicate, cyclosilicates ...) saying that those tetrahedrons can only share one corner (oxygen), but he didn't give us ...
6
votes
1answer
96 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?
1
vote
1answer
315 views

What type of glass are Pasteur pipettes made of?

What type of glass are Pasteur pipettes made of? And at what temperature do they need to be heated to create a micro-pycnometer?
1
vote
0answers
210 views

Why molten lithium burns through the glass but sodium not?

It's well-known in laboratory practice that one shouldn't melt lithium in a glass equipment and there isn't such rule about other alkali metals. You may damage the glass with sodium but lithium will ...
6
votes
1answer
2k 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 ...
3
votes
1answer
3k 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 ...
9
votes
1answer
14k 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?
20
votes
2answers
7k 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 ...
2
votes
0answers
182 views

Hexafluorosilicid acid attacks glass?

When HF meets glass, Hexafluorosilic acid is formed (assuming some water is present). It appears that Hexafluorosilic acid and further attack glass? How is this so, considering that all F atoms are "...
3
votes
1answer
329 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 "...
2
votes
1answer
5k 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 ...
3
votes
1answer
3k 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 ...
6
votes
1answer
2k 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 ...
10
votes
2answers
3k 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 ...
4
votes
2answers
188 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 ...
5
votes
1answer
472 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 ...
9
votes
1answer
2k 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 ...
8
votes
1answer
121 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 ...