Yttria stabilized zirconia (Y-CSZ) single crystals show plastic deformation at high temperatures byactivating dislocations. The effect of strain rate on the plastic behavior of this crystal was studied. As increasingstrain rate from ε=1.04×10-5sec-1 to 2.08×10-5sec-1 the yield drop was suppressed and resulted in higherYoung's modulus and yield stress. Dislocation structures of the strained crystals were analyzed using atransmission electron microscope to elucidate the plastic behavior of these crystals. In the early stage of plasticdeformation, dislocation dipoles and prismatic dislocation loops were formed in both samples. However,dislocation density was increased by increasing strain rate. Strong sessile dislocations were observed in thesample with higher strain rate, which may cause the higher work hardening.

[ ] powders for lithium ion batteries were synthesized from two separate raw material pairs of LiOH/MnO and . The powders prepared at 780 and and their difference of electrochemical properties were investigated. Both powders calcined at 780 and were composed of a single-phase spinel structure but those treated at showed a lower intensity ratio of to , a slightly larger lattice parameter, and an increased discharge capacity by 10% under voltage range. The XPS study on the oxidation states of manganese repealed that powders made from LiOH/MnO had less ion and gave better battery performances than those from .

[ ] was coated with , MgO and respectively by sol-gel method and cured at 900 and . The coated oxides did not react with at but reacted with it to form at . The specimen coated with at formed a dense protecting layer and showed the best oxidation resistance at in air. However, the dense protecting layers did not form in and MgO coated specimens cured even at . MgO coated specimen showed the worst improvement in the oxidation resistance because the reactivity of MgO with was highest. On the other hand, the electrical conductivities were measured in MgO and coated specimens to have TiCx but could not be measured in the coated ones because of the nonconductive dense protected layers.