M5 - Non-metals, Ceramics

Question 1

ceramic

Answer 1

• a non-metal, organic solid
• made up of either metal or non-metal compounds
• hardened by heating to high temperatures

Question 2

keramos: ___ ; keramikos: ___

Answer 2

potter’s clay, clay products

Question 3

structure of ceramics

Answer 3

• ionic or covalent
• has greater hardness and thermal & electrical resistance than metals
• single-crystal or polycrystalline
• grain size determine strength and toughness

Question 4

properties of ceramics

Answer 4

1) Heat resistant
2) Great hardness and strength
3) Durable
4) Good insulators
5) Unreactive with other chemicals
6) Brittle
7) Mechanical and physical properties can vary

Question 5

Raw materials of ceramics

Answer 5

clay, flint, feldspar, porcelain

Question 6

general types of ceramics

Answer 6

traditional ceramics

advanced engineering ceramics

Question 7

types of advanced engineering ceramics

Answer 7

OXIDES: alumina, zirconia, 
Carbides, 
Nitrides
Sialon, 
Cermets, 
Silicates

Question 8

traditional ceramics

Answer 8

ancient general-purpose material

Question 9

advanced engineering ceramics

Answer 9

ceramics that are engineered for highly specific applications

Question 10

cermets

Answer 10

• “Black” or “hot-pressed” ceramics
• Has combined properties from ceramics and metals
• less than 20% metal by volume

Question 11

piezoelectric effect

Answer 11

ability of certain materials to generate an electric charge in response to applied mechanical stress

Question 12

production processes of ceramics

Answer 12

1) Mixing 1
2) Sizing
3) Batching
4) Mixing 2
5) Forming
6) Drying
7) Glazing
8) Firing

Question 13

Mixing 1

Answer 13

uncured compound is manufactured to be further processed into rubber products

Question 14

sizing

Answer 14

To separate desirable material from non-usable material

Question 15

batching / blending

Answer 15

calculates amounts, weighing and initial blended of the raw materials

Question 16

Mixing 2

Answer 16

Constituents of the ceramic powder are combined To obtain a more chemically and physically homogeneous material

Question 17

Forming

Answer 17

dry powders, pastes or slurries are consolidated and molded to produce a cohesive body

Question 18

drying

Answer 18

heated air is circulated around the ceramic piece (to alleviate the risk of such imperfections in the final product)

Question 19

glazing

Answer 19

The glaze consists of oxides that give the product the desired finish look

Question 20

Firing / sintering / densification / frittage

Answer 20

Uses a controlled heat process to consolidate oxides creating a dense, cohesive body made up of uniform grain