03-1. Glass / History of glass

Today, let’s take a look at a beautiful but fragile friend, Glass.

When we all stand in front of the glass,

we are worried about breaking the window out of our guard for a moment,

so we are careful :)

 

Oh, of course, there is also really hard glass.

If you drop your smartphone while on the road,

Have you ever seen everyone who walked around hold their breath and flip their smartphone over?

My heart is fluttering until I turn it over, and when the liquid crystal is too good, t

hen I will exhale a sigh of relief!

 

The glass is so weak that it makes people nervous.

 

 

 

Glass is a hard but fragile'amorphous solid'.

An amorphous solid refers to a solid

that has no long-distance order for atoms, small units that make up an object.

 

The surface of the glass is not rough and smooth,

so you can easily miss it

if you do not hold it with something of friction when you hold it.

 

Also, because glass is transparent, light is transmitted through it.

 

I especially think that it is like a museum in the world where different colors meet

and show new paintings while looking at the glass :)

And although glass is used to make windows, bottles, glasses, etc., as mentioned earlier,

it has the disadvantage of being fragile.

 

The Beginning of Glass Egypt Next,

let's take a quick look at the history of glass.

 

The time when humans first made glass dates back to Egypt in the 15th century BC.

Since then, in Sicily, the largest Mediterranean island in southwestern Italy,

for the first time in the 10th century, something called'stained glass' was created.

 

Also, this stained glass spread to Europe in the 15th century.

At that time, it was said that glass was so expensive

that only the nobles could use it

because the lumps of glass were pressed with an iron and processed into flat glass.

 

Can a lump of glass be pressed with an iron?

I've seen a video of removing a tiny lump from a lump of glass

just before it flows down and making a vase.

At that time, it seemed like it was taken out of the furnace,

which seemed to be very hot, but it was really amazing and strange to press it flat with an iron!

 

 

Next, I will tell you very briefly about the raw material of glass.

 

There are many types of glass, but representatively speaking of flat glass.

In addition, the main component of glass is silicon dioxide (SiO2).

Silicon dioxide (SiO2) is an oxide of silicon.

And it is no exaggeration to say that it is the main component of glass or concrete,

and that most of the earth's crust is made of silicon dioxide.

Did you know that silicon and Si, which are No.

14 of the periodic table of the elements that you learned in chemistry class in high school,

were the raw materials for making glass?

There is so much information I would like to convey about Glass.

In the next post, you can have time to learn about the manufacturing process of glass :)

 

 

 

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See you again next time!

Thank you again today :)