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

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…

Housing Needs in House Search for Asperger’s Diagnosis

Essential requirements: ·Quiet away from traffic and flight path ·South facing windows for sunshine in the morning ·Triple glazing and proper A rated insulation ·Hedge and fence around property to block pollution A detached 2-bedroom property, 2 bathroom, 2 storey with attic and basement, study, dinning room, living room and kitchen with utility room, garage and small lawn all around property. Looking for something on a 10x10m plot with house on 8x8 m plan.

Things requested: ·Shower and a bath ·Air conditioning system with air filtration ·Tennis or squash court ·Swimming pool ·Vegetable garden ·Conservatory ·Solar panels ·UPS (uninterrupted power supply) device and battery backup ·22 foot high ceilings ·Detailed plastered finish ceiling ·Fireplace ·Security/blackout shutters ·Roof balcony

Criticism for the Tory Government in Britain

My criticism for Jacob Rees-Mogg and the Conservative Party would be from a financial perspective; the Tories have been poor on cost control and paying off stakeholders: extravagant wages and unpaid benefits bills. There have been no real compensation cases for human rights linked to the British education and qualifications system which is indicative of systemic failure at the grassroots. This means that there is a lack of opportunity for British people to do the work that they want to do; they are not being acknowledged. And a phoney social mobility scheme is propagating due to corporate culture being given precedence over British culture in public life.. I think the outlook could be negative for British finances with another credit rating downgrade for the UK, perhaps by two notches! My point is that it's the EU Pinkerton Agents getting the better of Tory government with Donald Tusk lording it over you from his office of power in the EU you won't get treated better in Europ…