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17 Questions

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Ceramic Materials Properties

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Questions and Answers

What is a notable property of Silicon Carbide (SiC)?

High corrosion resistance to acid (correct)

High chemical reactivity

High thermal conductivity

High thermal expansivity

What is a common application of Alumina (Al2O3)?

Aerospace industry

Grinding stones

Electronic engineering applications (correct)

Nuclear reactors

What type of ceramics is characterized by their high heat resistance?

Bioceramics

Refractory ceramics (correct)

Oxide ceramics

Non-oxide ceramics

What is a significant advantage of Silicon Carbide (SiC) over other non-oxide ceramics?

Greater corrosion resistance Signup and view all the answers

What is a key feature of Alumina (Al2O3)?

Large coefficient of thermal expansion Signup and view all the answers

What are some examples of advanced ceramic materials used in various industries?

Advanced Ceramics in Biomedical, Nuclear, Electronic, Aerospace Signup and view all the answers

What is the hybridization of carbon atoms in each layer of graphite?

sp2 Signup and view all the answers

Why is graphite used as a lubricant?

Due to its weak bonding between individual layers Signup and view all the answers

What is the primary characteristic of a refractory material?

Ability to withstand high temperatures Signup and view all the answers

What is the minimum temperature service required for a material to be considered refractory?

600 °C Signup and view all the answers

What are some of the key properties of refractory materials?

High volume stability, resistance to thermal and thermomechanical loads, and resistance to erosion and abrasion Signup and view all the answers

What is the primary characteristic of ceramic materials that enables them to exhibit high melting points?

Their ionic and/or covalent bonds Signup and view all the answers

Which of the following ceramic compounds exhibits a higher percentage of ionic character?

Magnesium Oxide (MgO) Signup and view all the answers

What is the primary reason why ceramic materials are typically insulated to heat and electricity?

Their low thermal conductivity Signup and view all the answers

Which of the following ceramic materials is known for its magnetic behavior?

Iron Oxide (Fe3O4) Signup and view all the answers

What is the primary criterion for achieving the minimum energy state in ceramic crystal structures?

Achieving maximum attraction and minimum repulsion Signup and view all the answers

What is the characteristic of ceramic materials that makes them extremely brittle and unable to be formed?

Their very hard nature Signup and view all the answers