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Transparent ceramics made with aluminum

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Re: Transparent ceramics made with aluminum

#11

Post by TheSpiceIsLife »

Lramseyer wrote: post #4

This definitely looks like something that has the potential to be really useful, and gives the example of replacing gorilla glass. While I get that this is a very tough glass, I did not see anything about it's hardness in relation to gorilla glass, as hardness is the property that provides the scratch resistance that is so highly sought after in smartphone screens. Toughness is how much energy a material can absorb,…

I wish it was possible to buy a phone with the option of a screen who’s glass was optimised for toughness rather than hardness, or at least an aftermarket replacement.

I can live with a screen protector, but broken glass is the bane!

Re: Transparent ceramics made with aluminum

#12

Post by tim333 »

dbsvsv wrote: post #10
dvh wrote: post #3

Metal will never be transparent. Metal means metal bonds which means free electrons. Free electrons are opaque to visible light.

I don't think in quite understand. You mean they don't let photons to pass through? In which case do electrons in orbit? Or nuclei for example? Or does this need advanced physics knowledge?

Roughly light is electromagnetic radiation and puts force on electrons it comes in contact with. If the electrons are fixed in a non conductor they don't move much and so don't absorb the energy. If they can move as in most metals the force accelerates them and they absorb energy from the radiation, stoping of reducing it.

Re: Transparent ceramics made with aluminum

#14

Post by dbsvsv »

tim333 wrote: post #12
dbsvsv wrote: post #10

Earlier quoted context omitted.

I don't think in quite understand. You mean they don't let photons to pass through? In which case do electrons in orbit? Or nuclei for example? Or does this need advanced physics knowledge?

Roughly light is electromagnetic radiation and puts force on electrons it comes in contact with. If the electrons are fixed in a non conductor they don't move much and so don't absorb the energy. If they can move as in most metals the force accelerates them and they absorb energy from the radiation, stoping of reducing it.

My physics is only high school level so as I see, in the case of fixed - does the photon not get scattered/reflected or does it pass through the electron? And why no orbital transition?

Re: Transparent ceramics made with aluminum

#15

Post by masklinn »

TheSpiceIsLife wrote: post #11
Lramseyer wrote: post #4

This definitely looks like something that has the potential to be really useful, and gives the example of replacing gorilla glass. While I get that this is a very tough glass, I did not see anything about it's hardness in relation to gorilla glass, as hardness is the property that provides the scratch resistance that is so highly sought after in smartphone screens. Toughness is how much energy a material can absorb,…

I wish it was possible to buy a phone with the option of a screen who’s glass was optimised for toughness rather than hardness, or at least an aftermarket replacement. I can live with a screen protector, but broken glass is the bane!

I would assume "rugged(ized)" phone series have this sort of tradeoffs

Re: Transparent ceramics made with aluminum

#17

Post by TheSpiceIsLife »

masklinn wrote: post #15
TheSpiceIsLife wrote: post #11

Earlier quoted context omitted.

I wish it was possible to buy a phone with the option of a screen who’s glass was optimised for toughness rather than hardness, or at least an aftermarket replacement. I can live with a screen protector, but broken glass is the bane!

I would assume "rugged(ized)" phone series have this sort of tradeoffs

I have a ruggedised case on my phone. Trade-offs hey.

Apple don’t make a ruggedised phone, if I wanted that I’d have to by an Android.

I would buy an Android, but I don’t want to.

Re: Transparent ceramics made with aluminum

#18

Post by samastur »

TheSpiceIsLife wrote: post #17
masklinn wrote: post #15

Earlier quoted context omitted.

I would assume "rugged(ized)" phone series have this sort of tradeoffs

I have a ruggedised case on my phone. Trade-offs hey. Apple don’t make a ruggedised phone, if I wanted that I’d have to by an Android. I would buy an Android, but I don’t want to.

Something like this https://www.catphones.com/ ?

Re: Transparent ceramics made with aluminum

#19

Post by raverbashing »

dbsvsv wrote: post #10
dvh wrote: post #3

Metal will never be transparent. Metal means metal bonds which means free electrons. Free electrons are opaque to visible light.

I don't think in quite understand. You mean they don't let photons to pass through? In which case do electrons in orbit? Or nuclei for example? Or does this need advanced physics knowledge?

A conductive surface will reflect an EM wave because a lot of math but it can be proven

Re: Transparent ceramics made with aluminum

#20

Post by ger_in_no »

dbsvsv wrote: post #14
tim333 wrote: post #12

Earlier quoted context omitted.

Roughly light is electromagnetic radiation and puts force on electrons it comes in contact with. If the electrons are fixed in a non conductor they don't move much and so don't absorb the energy. If they can move as in most metals the force accelerates them and they absorb energy from the radiation, stoping of reducing it.

My physics is only high school level so as I see, in the case of fixed - does the photon not get scattered/reflected or does it pass through the electron? And why no orbital transition?

Reflection on the surface of polished metals occurs because of the collective movement of electrons at the surface, caused by the incoming photons. Light of most wavelengths, especially low-energetic infrared doesn't have enough energy to cause orbital transitions in most elements.
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