A research team must select a solid material to serve as an electrical insulator…
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A research team must select a solid material to serve as an electrical insulator inside a high-temperature furnace (operating at 1 200 K). Four candidate solids are under consideration:
(a) From the list, identify the solid that is least suitable for use as the furnace insulator at 1 200 K. Provide two distinct property-based reasons for its elimination.
(b) Between MgO and SiO2, determine which solid is the stronger candidate for the application. Construct a comparative argument that references at least two different macroscopic properties and links each property to the underlying type of bonding or lattice structure.
(c) The team ultimately selects your recommended material and discovers that microscopic cracks form after multiple thermal cycles. Suggest one structural modification or material processing strategy that could mitigate crack formation, and briefly explain the chemical reasoning behind your suggestion.