The spinel structure of LiMn2O4 powders react with the 1 mole Li2CO3 and 4 mole MnO2 powders by solid-state reaction at 800 oC, and then sintered at 1300 oC to become ceramics specimen. There are accompany phase transformation and non-stoichiometric composition during the cooling process. In X-ray diffraction analysis, the sintered specimen contains principal Li-deficiency Li1-XMn2O4 composition and minor of second phases LiMnO2 and Mn3O4. Lattice parameters also distorted by John-Teller effect. In electron microscopy observation, there are lamellae grains and defects in the specimen, such as twins, dislocations and stacking faults. In TEM analysis, tetragonal-LiMn2O4 structure has lamellae domains, and reflection twinning. However, this study for cubic-LiMn2O4 structure found that edge dislocations with Burger vector of 1/2<110> slip on {110} plane, and mixed(45o) dislocation with Burger vector of 1/2<100> slip on {100} plane.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0722104-143256 |
| Date | 22 July 2004 |
| Creators | Wang, Chun-Chieh |
| Contributors | Ming-Ren Huang, Hong-Yang Lu, Bing-Hwait Hwang, Chi-Shiung Hsi |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0722104-143256 |
| Rights | off_campus_withheld, Copyright information available at source archive |
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