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?

<p>Greater corrosion resistance (C)</p> Signup and view all the answers

What is a key feature of Alumina (Al2O3)?

<p>Large coefficient of thermal expansion (C)</p> Signup and view all the answers

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

<p>Advanced Ceramics in Biomedical, Nuclear, Electronic, Aerospace (A)</p> Signup and view all the answers

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

<p>sp2 (A)</p> Signup and view all the answers

Why is graphite used as a lubricant?

<p>Due to its weak bonding between individual layers (C)</p> Signup and view all the answers

What is the primary characteristic of a refractory material?

<p>Ability to withstand high temperatures (C)</p> Signup and view all the answers

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

<p>600 °C (B)</p> Signup and view all the answers

What are some of the key properties of refractory materials?

<p>High volume stability, resistance to thermal and thermomechanical loads, and resistance to erosion and abrasion (B)</p> Signup and view all the answers

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

<p>Their ionic and/or covalent bonds (B)</p> Signup and view all the answers

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

<p>Magnesium Oxide (MgO) (B)</p> Signup and view all the answers

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

<p>Their low thermal conductivity (A)</p> Signup and view all the answers

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

<p>Iron Oxide (Fe3O4) (D)</p> Signup and view all the answers

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

<p>Achieving maximum attraction and minimum repulsion (D)</p> Signup and view all the answers

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

<p>Their very hard nature (B)</p> Signup and view all the answers

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