Question: 4.3. Al 2 O 3 will form a limited solid solution in MgO. At the eutectic temperature (1995C), approximately 18wt% of AI2O3 is soluble in

4.3. Al₂O₃ will form a limited solid solution in MgO. At the eutectic temperature (1995C), approximately 18wt% of AI2O3 is soluble in MgO. The unit-cell dimensions of MgO decrease. Predict the change in density on the basis of (a) interstitial Al³⁺ ions and (b) substitutional Al³⁺ ions.

4.6. Estimate the number of free vacancies, interstitials, and associates in 1cm³ at 500C of (a) pure AgBr and (b) AgBr+ 10^-4m/o CdBr.

4.7. Construct a diagram similar to Fig.4.8 for the AgBr data in Problem 4.6.

4.3. Al2O3 will form a limited solid solution in MgO. At the

Fig. 4.8. Calculated (for NaCl ) and estimated (for MgO ) individual and associated defect concentrations for samples containing 1ppm aliovalent solute

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