Question Seven(a) For refractory ceramic materials, cite two characteristics that improve with and two characteristicsthat are adversely affected by increasing porosity.(b) Show that the minimum cation-to-anion radius ratio for a coordination number of 4 is 0.225.(Hint: Use the AX crystal structure, assuming the anion spheres touch in plane).(c) The unit cell for Al>O; has hexagonal symmetry with lattice parameters a = 0.4759 nm and c 1.2nm. If the density of this material is equal to 3.99 g/cm' and is calculated according to the formukan'(EAc+ EA)VcNACalculate the atormic packing factor for Al>O1, given that the ionic radius for AI is 0.053 nm and i0' is 0.140 nm. Take N = 6.023 x 1023 atoms'mole.(d) Mention any three industrial ceramics and indicate their applications.

Since you have asked multiple question, we will solve the first question for you. If you want any…

Answered: (a) For refractory ceramic materials,…

(a) For refractory ceramic materials, cite two characteristics that improve with and two characteristics that are adversely affected by increasing porosity.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: a) Draw and label the band diagram for a conductor and a semiconductor, clearly showing the…

A: Since you asked multiple questions so as per Q&A guidelines of portal I solved first three parts…

Q: What would be the atomic percentage of carbon in each type of iron if all the interstitial sites…

A: In the FCC type of cell, atoms are present at the corners of the cell and at the face center of the…

Q: Indicate whether each statement is true or false:(a) The band gap of a semiconductor decreases as…

A: FALSE, As the particle size decreases, band gap of semiconductor increases.

Q: At the attachment. Please assist.

A: Phase diagram represents the stability of a substance in different states (solid, liquid and gas)…

Q: Based on the unit cell shown, what is the formula of the structure on the left (i.e. the one labeled…

A: A unit cell of a crystal is the smallest repeating unit of space lattice from which the entire…

Q: Melting Pt. (°C) Boiling Pt. (°C) Substance Appearance Conducts as Conducts as solid liquid…

Q: How much dopant is present in 107 kgkg of semiconductor with a dopant concentration of 2.00 ppmppm…

A: Given: Mass of semiconductor = 107 Kg. And the concentration of dopant = 2.00 ppm by mass.

Q: Which of the following doped semiconductors will be p-type and which will be n-type?please explain…

A: Hi, since there are multiple subparts posted we will provide you with answers for the first-three…

Q: Which of these statements is false?(a) As you go down column 4A in the periodic table, the…

A: As we go down the group 4A or group 14 in periodic table, the atomic size increases and the valence…

Q: 2. What is glass-ceramic? Please explain the differences between glass and glass & ceramics ?…

A: Answer - Glass-ceramic - a glass-ceramic is a solid material, partly crystalline and partly glassy,…

Q: Give name of any two alloys which contains nickel.

A: Alloy:An alloy is a combination of metals or metal combined with other elements.

Q: The structure of bentonite is best described as Select one: a. Negatively charged aluminium silicate…

Q: Sketch within a cubic unit cell the given direction and plane. The origin point for the index of…

A: The planes in unit cubic cell are pictorially shown below

Q: Can you please answer this with serious detail and depth, as in every last little step explained as…

A: Hexagonal closed packing refers to layers of spheres packed so that spheres in alternating layers…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Similar questions

(d) The figure below represents an FCC structure. Determine: i. The relationship between the lattice parameter and atomic radius ii. The atomic packing factor of the structure.
How does the relative sizes of ions and the maintenance of charge neutrality affects the determination of the crystal structure of ceramic materials? Factors that Determine Crystal Structure 1. Relative sizes of ions - Formation of stable structures: --maximize the # of oppositely charged ion neighbors. 8 + Adapted from Fig. 12.1. Callister & Rethwisch Be. unstable stable 2. Maintenance of F- Charge Neutrality: --Net charge in ceramic CaF2: Ca2+ anions cation should be zero. F- --Reflected in chemical formula: m, p values to achieve charge neutrality AmXp stable + Ak
) – Extraction of metals Explain as fully as you can the need for different methods of extraction. Your account should include sufficient details of extraction processes to support your explanation of the need for different extraction methods for different metals. With references
"Application of the theory of the crystalline field" and your knowledge of theory of the crystalline field, answer the following questions: a) Given the following graph, explain why VF2 and NiF2 have higher grid energy crystalline with respect to the expected trend for the divalent halides of the metals from the first transition series. Justify your answer. experimental line Zn2. -------------------. expected line Mn2. Ca2 MF, of first row transition metals do d! d? d³ d d5 do d7 d® d° d!o * Lattice Eners nergy
3. Compare and contrast the two types of close-packing in solids? 4. Why is there % error in part II? What could be the reason for such error? 5. By understanding the structure of crystals molecularly, what is its relation to the strength of materials? 6. Use the internet to search three (3) examples of metals which have HCP, FCC and BCC structures. Relate the structure to the characteristic properties of each metal. Please indicate the condition the given structures are observed.
Introduction of carbon into a metallic lattice generally resultsin a harder, less ductile substance with lower electricaland thermal conductivities. Explain why this might be so.
In the iron-carbon alloy phase diagram as shown in Fig. 1, draw the microstructures with indicating the name of each phases existing at (a) - (h) point.
If you want to determine the glass transtion tempreture (Tg), softening point (Ts), melting point (Tm) and crystallization temperatures (Tc) of the glass-ceramics which characterization techniques can be used? Plase expain in details.
What volume of H2 gas, measured at 67˚C and 800. torr can be obtained by reacting 10.00 g magnesium metal with 300. mL of 0.450 M HCl? Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g) To do this, answer the following questions: a. the limiting reactant is? b. the maximum number of moles of H2 (g) that can be produced from this reaction is? c. now that you have the moles of H2, which equation will you use to calculate the volume of H2 (g) that can be produced from this reaction? d. the volume of H2 (g) that can be produced from this reaction is? Mg = 24.31 g/mol HCl= 36.46 g/mol H2 = 2.016 g/mol MgCl2 = 95.21 g/mol
The density of liquid mercury is 13.5 g/cm3. What mass (in kg) of mercury is required to fill a 2.00 L container?
The metal MIhas an FCC crystal structure. If the angle of diffraction for the (220) set of planes occurs at 69.22°(first-order reflection) when monochromatic x-radiation having a wavelength of 0.1542 nm is used, compute (a) the interplanar spacing for this set of planes,(b) the lattice parameter (the cubic edge length)a, (c) atomic radius for aMIatom.
Explain the following observation: