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Ch.12 - Solids and Modern Material
Chapter 12, Problem 54

Classify each of the following as a component of a silicate ceramic, an oxide ceramic, or a nonoxide ceramic. a. TiB2 b. ZrO2 c. NaAlSi3O8

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Identify the chemical formula of each compound and determine the elements present.
For TiB_2, recognize that it contains titanium (Ti) and boron (B), which are not oxygen, indicating it is a nonoxide ceramic.
For ZrO_2, note that it contains zirconium (Zr) and oxygen (O), classifying it as an oxide ceramic.
For NaAlSi_3O_8, observe that it contains sodium (Na), aluminum (Al), silicon (Si), and oxygen (O), which is characteristic of a silicate ceramic.
Classify each compound based on the presence of oxygen and the type of elements involved: TiB_2 as nonoxide, ZrO_2 as oxide, and NaAlSi_3O_8 as silicate.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Silicate Ceramics

Silicate ceramics are materials primarily composed of silicon and oxygen, often combined with various metal oxides. They are characterized by their high melting points, chemical stability, and mechanical strength. Common examples include feldspar and kaolinite, which are used in pottery and glass production. Understanding the composition of silicate ceramics is essential for classifying materials based on their chemical structure.
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Oxide Ceramics

Oxide ceramics are inorganic compounds that consist mainly of metal oxides, such as alumina (Al2O3) and zirconia (ZrO2). These materials are known for their excellent thermal stability, electrical insulation properties, and resistance to corrosion. Oxide ceramics are widely used in applications ranging from electrical insulators to dental materials. Recognizing the characteristics of oxide ceramics is crucial for proper classification in the context of the question.
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Nonoxide Ceramics

Nonoxide ceramics are a diverse group of materials that do not contain oxygen in their primary structure, often including carbides, nitrides, and borides. Examples include titanium diboride (TiB2) and silicon carbide (SiC), which are known for their hardness and thermal conductivity. These materials are typically used in high-performance applications such as cutting tools and armor. Understanding the classification of nonoxide ceramics is important for accurately categorizing the materials in the question.