Smart Materials

Question 1

Smart materials

Answer 1

Materials that have one or more properties that can be significantly changed in a controlled fashion by external stimuli such as stress, temperature, moisture, pH, electric or magnetic fields

Question 2

Piezoelectric

Answer 2

Electrical charge built up in response to mechanical stress

Question 3

Thermochromic

Answer 3

Changes colour when exposed to heat

Question 4

Phosphorescent

Answer 4

Absorbs light and glows in the dark.

Question 5

Photochromic

Answer 5

UV light stimulates particles in a special pigment. Colour change when exposed to light.

Question 6

QTC-Quantam tunnelling composite

Answer 6

Varies its electrical resistance depending on the amount of pressure applied.

Question 7

Piezoelectric examples

Answer 7

Seat belt sensors, sensors, burglar alarms

Question 8

Phosphorescent examples

Answer 8

Signs, stickers, clock dials

Question 9

Thermochromic examples

Answer 9

Baby spoons, thermometers

Question 10

Photochromic examples

Answer 10

Glasses, windows

Question 11

QTC examples

Answer 11

Touch screens

Question 12

Shape memory alloy

Answer 12

Metal alloys that can remember their shape when heated

Question 13

Shape memory alloy example

Answer 13

Braces