Developments In Technology Flashcards
What are micro electronics and give examples of these
the study and manufacture of very small electronic designs and components.
An example of a micro electronic is:
-transistors- amplify, or switch electronic signal
-capacitors-stores, Electrical energy
-resistors- reduce current flow
What is a modern material?
- materials that are developed through the use of new and improved processes as a result of man-made materials, they do not change based on external stimuli, and they keep the same properties.
What is a smart material?
Smart materials are reactive materials, this means that their properties are changed by exposure to external stimuli. For example, pressure, light, magnetic fields, et cetera
What is a new material?
material that has not previously been used in the manufacture of another article used for any purpose.
What is a composite material?
-A composite material is a mixture of two or more dissimilar materials to enhance a property
-for example, concrete is a mixture of cement powder, sand and water to improve strength
-what is a shape memory alloy?
-smart material
-The special metal alloys that had the ability to remember their original shape, and then returned to it when heated after being deformed
-A current is passed through the metal to set the shape of the product
-used in stents and medical devices.
-what are thermochromic pigments?
-Smart materials
-these are specialised colour, changing pigments that respond to changes in temperature.
-they contain microcapsules with liquid crystals, which then expand or contract with temperature change
-what is a phosphorescent pigment?
-Smart material
Pigments which possess the unique ability to emit light, after being exposed sources.
they didn’t continue to emit light for a period of time, even after the light source is removed
-what are photochromic pigments?
-Smart material
-Photochromic pigments, undergo reversible changes when exposed to UV rays
-Use in sunglasses
-what is an electroluminescent wire?
Smart material
-This is a thin flexible wire that admits light when an altering current voltage is applied
-What is a piezo electric material?
-piezo electric materials can generate a small electric charge when in response to pressure
What is Kevlar?
Modern material
-Kevlar is a synthetic fibre made from long chains of poly propylene terepthalamoide Woven with carbon
What is precious metal clay?
-modern
-modelling material made of tiny particles of precious metals. They have a similar working properties to normal clay. However, we fired in a kilin The tiny particles of metal melt, transforming the clay to metal.
-what is high density modelling foam?
Moddern
-made from polyene resin and is engineered to have a uniformed cell structure
-what is graphene?
-Single layer of carbon atoms in a 2-D honeycomb lattice
