t4f05 - 1. When modifiers like Na2O are added to network...

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1. When modifiers like Na2O are added to network formers like SiO2, the oxygen to silicon ratio a. decreases b. increases c. does not change d. decreases to make glassy phase to form 2. The principle test method for estimating the strength of a ceramic is the a. impact test b. tensile test c. flexural test d. a large stress/strain ratio 3._____The coordination of the cation in an ionic ceramic structure depends on a. the density b. the charges on the ions c. the ratio of the cation to the anion radii d. none of the above 4. Processing of ceramic particulate composites such as WC-Co is carried out by a. pressing the powder to form a green compact b. casting the molten components c. pressing the powder to form a green compact and sintering d. deforming the green compact to the proper shape 5._____An elastomer can be made stiffer (the modulus can be increased) by a. heating it above the Tg b. increasing the amount of cross-linking c. decreasing the amount of cross-linking d. none of the above
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t4f05 - 1. When modifiers like Na2O are added to network...

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