23. Common constituents of commercial glasses are SiO2, Na₂O, MgO/CaO, Al₂O3 and B₂O3.Which of the following constituent-property correlations is incorrect?a. SiO₂-forming amorphous networkb. Soda/lime - lowering softening temperaturec. B₂O3- lowering thermal expansion coefficientd. Al2O3- improving acid refractory property

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Common constituents of commercial glasses are SiO2, Na2O, MgO/CaO, Al₂O3 and B₂O3. Which of the following constituent-property correlations is incorrect?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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Concept explainers

Chemical and Phase Equilibrium

Phase diagrams or equilibrium phase diagrams are the graphical representations that show the phase transformations of the constituting elements with respect to the pressure, temperature, and compositions. The diagrams show the conditions that limit the different phases, namely solid, liquid, and gas. The diagram can also be utilized to verify the relations between the state variables. Most of the phase diagrams are temperature-pressure phase diagrams, with the variable parameter as the composition. Usually other variables such as solubility and pressure parameters are not indicated in the phase diagram. For a one-component system (unary phase diagram), the phase diagram is generally a function of temperature and pressure as the state variables, or temperature and volume. However, for a binary system (two-phase) having two components, the phase diagram is a function of temperature and composition as the state variables only. Coexisting of the different phases of the constituting elements is indicated in the phase diagram. A ternary phase diagram can be characterized by consisting of three phases in equilibrium.

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23. Common constituents of commercial glasses are SiO2, Na₂O, MgO/CaO, Al₂O3 and B₂O3.
Which of the following constituent-property correlations is incorrect?
a. SiO₂-forming amorphous network
b. Soda/lime - lowering softening temperature
c. B₂O3- lowering thermal expansion coefficient
d. Al2O3- improving acid refractory property

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