• Title/Summary/Keyword: annealing effects

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Effects of Annealing and Drawing on Crystal Structure and Supermolecular Structure of Poly (L-Lactide)

  • Sawade, E.;Irie, S.;Sasaki, T.;Sakurai, K.
    • Proceedings of the Korean Fiber Society Conference
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    • 2003.10a
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    • pp.97-97
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    • 2003
  • Recently, attention has been paid to biodegradable polymers in relation to the global environment. Poly-lactide (PLA) is one of such polymers and has studied by some investigators. In this study, the changes of crystal structure, crystal orientation and supermolecular structure of Poly(L-lactide) (PLLA) during drawing or annealing have been investigated.

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Effects of UV ozone annealing on conduction mechanism in Ta2O5 thin films deposited by atomic layer deposition (Atomic layer deposition으로 증착된 Ta2O5 박막의 전도기구에 대한 UV ozone annealing 효과)

  • 엄다일;전인상;노상용;황철성;김형준
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2003.11a
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    • pp.57-57
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    • 2003
  • High dielectric constant materials (high K) have attracted a great deal of interest because of the dramatic scaling down of DRAM capacitor reaching its physical limit in terms of reduction of thickness. Among high-K materials that can replace silicon dioxide, tantalum pentoxide (Ta2O5) thin film, with their high dielectric constant (∼25) and good step coverage, is the candidate of choice.

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Structure and Magnetic Properties of Sm-Co(x nm)/Co(6 nm) Multi-layered Nanocomposite Films

  • Yang, Choong-Jin;You, Cai-Yin;Zhang, Zhi-Dong
    • Proceedings of the Korean Magnestics Society Conference
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    • 2002.12a
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    • pp.24-25
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    • 2002
  • Tthe structure and magnetic properties of Sm-Co/co films treated at various annealing temperatures and times are reported, The effects of an externally applied magnetic field during annealing, were also investigated. These result is discussed in terms of magnetization reversal of nano grains which seems to compete with the exchange interaction occurring between the nano grains. (omitted)

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Thickness and Annealing Effects on the Thermoelectric Properties of P-type Bi0.5Sb1.5Te3 Thin Films (P형 Bi0.5Sb1.5Te3 박막의 열전 특성에 미치는 두께 및 어닐링 효과)

  • Kim Il-Ho;Jang Kyug-Wook
    • Korean Journal of Materials Research
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    • v.14 no.1
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    • pp.41-45
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    • 2004
  • P-type $Bi_{0.5}$$Sb_{1.5}$ $Te_3$ thin films were deposited by the flash evaporation technique, and their thermoelectric properties and electronic transport parameters were investigated. The effective mean free path model was adopted to examine the thickness effect on the thermoelectric properties. Annealing effects on the carrier concentration and mobility were also studied, and their variations were analyzed in conjunction with the antisite defects. Seebeck coefficient and electrical resistivity versus inverse thickness showed a linear relationship, and the effective mean free path was found to be 3150$\AA$. No phase transformation and composition change were observed after annealing treatment, but carrier mobility increased due to grain growth. Carrier concentration decreased considerably due to reduction of the antisite defects, so that electrical conductivity decreased and Seebeck coefficient increased. When annealed at 473 K for 1 hr, Seebeck coefficient and electrical conductivity were $160\mu$V/K and 610 $W^{-1}$ $cm^{ -1}$, respectively. Therefore, the thermoelectric quality factor were also enhanced to be $16\mu$W/cm $K^2$.>.