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Visar resultat 1 - 5 av 12 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Properties in New Complex Perovskite-Related Materials, a Matter of Composition and Structure

   Författare :Samrand Shafeie; Gunnar Svensson; Jekabs Grins; John T. S. Irvine; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Perovskite; XANES; XRPD; NPD; TEC; TEM; SEM; TGA; SAED; HREM; thermal expansion; Seebeck coefficient; electronic conductivity; SOFC materials; magnetic susceptibility; Perovskit; XANES; XRPD; NPD; TEC; TEM; SEM; TGA; SAED; HREM; termisk expansion; Seebeck koefficient; elektrisk ledningsförmåga; SOFC material; magnetiska egenskaper; Materials Chemistry; materialkemi;

   Sammanfattning : This PhD thesis presents investigations of perovskite-related compounds in systems of interest for applications in components in solid oxide fuel cells. The compound compositions derive from substitutions in the parent compounds LaCoO3, LaCrO3 and SrFeO3. LÄS MER

3. 2. Microstructural evolution of thin epitaxial Perovskite films

   Författare :Lars Ryen; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; superlattice; filmm growth; interfacial strain; YBa2Cu3O7-x; HREM; SrTiO3; misfit dislocation; thin film; microstructure; TEM; perovskite;

   Sammanfattning : .... LÄS MER

4. 3. A TEM investigation of adhesion between nanoparticles

   Författare :Yiming Yao; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; CBED; interface; image simulation; nano-particle contacting; TEM; HREM; contacting stress;

   Sammanfattning : .... LÄS MER

5. 4. Studies of phases structurally related to hexagonal tungsten bronze in the system ATO₃ - WO₃ (A = K, Rb, Cs; T = V, Nb, Ta)

   Författare :Renu Sharma; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Volfram;

   Sammanfattning : The oxidized analogues (bronzoids) of tungsten bronzes in the systems dTO^-WO^ with A = K, Rb, Cs; T = Ti, V, Nb, Ta and A/W < 1 are reviewed with emphasis on the K-Nb and Cs-Nb systems. The different phases observed in these systems are isostructural with intergrowth tungsten bronze (ITB), hexagonal tungsten bronze (HTB), tetragonal tungsten bronze (TTB) and pyrochlore. LÄS MER

7. 5. A TEM Investigation of Contact between Nanoparticles

   Författare :Yiming Yao; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LACBED; CBED; nanoparticles; interface; adhesion; image simulation; energy filtering; misorientation; contacting; strain field TEM;

   Sammanfattning : Interaction between nanoparticles (1~100nm) provides us with answers to fundamental questions in many important applications e.g. adhesion, friction, and cold welding. The attractive force arises from the reduction of the total free surface and thus the total surface energy due to the formation of a boundary between the contacting particles. LÄS MER