Skip to main content

Why should we be interested in glass?

Why should we be interested in glass?
Dr Anita Zeidler, Physics Department, University of Bath at BRLSI on 30th June 2016.
Convenor science group, John Davies.
Notes by William Gaskell.

Glass’ properties include:
·         Good heat shock resistance
·         Insulation of heat and electricity
Making it good for cooking hobs.

Glass formation:
Slow cooling -> ordered pattern formation -> crystal
Fast cooling (quenching) -> amorphous liquid structure frozen -> glass

Glass is a solid with structure that resembles a liquid. Flint is actually a glass, which is why it could be chiselled into very sharp points for stone age arrowheads and blades.

Glass is composed of silicon and oxygen: Si + O also perhaps B or P, Al, K, Ca, depending on the use. For example, in the nuclear industry glass with a high proportion of lead is used to improve the shielding effect from radiation.

Gorilla glass made by etching or dipping surface of glass into an alkali metal solution, replacing sodium ions with potassium to put the surface under stress making it much harder and more resistant to breaking.

Arctic frog’s blood turns to glass when it freezes so it can survive freezing and defrosting without rupturing any cell membranes or blood vessels as the freezing process to glass would not create any sharp edges as would happen in a regular freezing process where the crystal structure could form sharp spikes which would damage the cell membranes and blood vessels.

Dr Zeidler’s research is on how glass properties change when permanently densified under 20 GPa of pressure, this work was being conducted in Grenoble Research Reactors with neutrons to study how the structure changes.


Caramel, made by dissolving sugar into water, is an example of a glass you can make at home by dissolving sugar in the water then heating it up – let it cool and it caramelises into a glass!

Comments

Popular posts from this blog

LETTERS TO BEN: National Careers Service

Dear Ben,

Please find forwarded below the helpful advice I received from the National Careers Service RE compensation, which mirrored the advice Sue and Shirley offered after our meeting today. I hope I am communicating with you clearly enough that I want more money and more satisfaction from life, I want jobs to be easier and the girls to be easier as I currently feel frustrated. I don't feel I should have to do any more work to get it other than to raise this complaint at this point.
The thing I am most looking forward to is the rugby world cup in 2019 in Japan which I plan to go to with friends.
Regards,
William
Thanks. In reply to your email, the following information might be helpful to you.  
Your CV and cover letter look fine and you have some good work experience. Have you been keeping an eye on Hinkley point (near Bridgewater)? Here in the South West that is probably the biggest ongoing potential nuclear project at the moment and you could send a speculative CV to EDF energ…

Camden Crescent and Hedgemead Park

Here are my thoughts: Did you know that Camden Crescent, originally Camden Place and Upper Camden Place (which is now round the corner) was named after the Earl of Camden, Charles Pratt, who was Chancellor of the Exchequer so sponsored the scheme with his symbol on every door and crest of the exchequer on the decoration at the centre of the crescent? Charles Pratt was actually lord of Camden Place in Chislehurst in Kent. He was mates with William Pitt the Elder from Eton and Cambridge days. It was built 1788-1792 by John Eveleigh the architect.  One third of the 22 house crescent collapsed during a landslip which claimed 136 houses on the slopes of Lansdown Hill leading to the creation of Hedgemead Park below Camden Crescent. John Eveleigh was notoriously bankrupted in Bath, being called to the coffee shop in the Bath Chronicle by his creditors. Earl Camden was famous for supporting Fox’s Libel Act of 1792 which said that libel should be tried as murder with a jury regarding the poin…

Notes from Energy & Utility Forum 2017

1.Robert Symons, CEO of Western Power Distribution said: “Energy demand could rise by 100% by 2030. Smart grids will be needed to manage electric vehicle charging so that the usage does not exceed the supply capacity at any time during the day.”
2.Spoke to Harry Vickers, Business Development Manager of Camborne Energy Storage, Camborne Capital at the Energy and Utility Forum in London on October 23rd 2017. He told me his company is working with Elon Musk to bring Tesla battery grid storage solutions to the UK.
3.Spoke to Sally Barrett-Williams, Chairman of Energy and Utility Forum on October 23rd, who said subsidies for solar projects had ended and her company’s focus has shifted to energy storage schemes.
4.Spoke to Simon Dowland, PhD, at 13:00 on Sunday 29th October, Simon is now working up in Cambridge at the Cavendish Physics Laboratory at the University of Cambridge, he is working in industry for the company Eight19 Ltd a spin off from a research project to bring new technology …