Dependence of Al2O3 coating thickness and annealing conditions on microstructural and electrochemical properties of LiCoO 2 film

Sun Gyu Park; Seong Rae Lee; Won Il Cho; Byung Won Cho

doi:10.1007/s12540-010-0093-9

Dependence of Al₂O₃ coating thickness and annealing conditions on microstructural and electrochemical properties of LiCoO ₂ film

Sun Gyu Park, Seong Rae Lee, Won Il Cho, Byung Won Cho

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Porous Y-doped (Ba,Sr)TiO₃ ceramics were prepared by the spark plasma sintering of (Ba,Sr)TiO₃ powders with different amounts of carbon black, and by subsequently burning out the carbon black acting as a pore precursor. The microstructure, PTCR and gas-sensing characteristics for porous Y-doped (Ba,Sr)TiO₃ ceramics were investigated. Spark plasma sintered (Ba,Sr)TiO₃ ceramics revealed a very fine microstructure containing submicron-sized grains with a cubic phase and revealed an increased porosity after the carbon black was burned out. As a result of reoxidation treatment, the grain size of the (Ba,Sr)TiO₃ ceramics increased to a few and mu;m and the cubic phase transformed into a tetragonal phase. The phase transformation of (Ba,Sr)TiO₃ ceramics was affected by grain size. The PTCR jump in the (Ba,Sr)TiO₃ ceramics prepared by adding 40 vol.% carbon black showed an excellent value of 4.72 and times; 10 6 , which was ten times higher than the PTCR jump in (Ba,Sr)TiO₃ ceramics. The electrical resistivity of the porous (Ba,Sr)TiO₃ ceramics was recovered as the atmosphere changed from a reducing gas (N₂) to an oxidizing gas (O2) under consecutive heating and cooling cycles.

Original language	English
Pages (from-to)	93-98
Number of pages	6
Journal	Metals and Materials International
Volume	16
Issue number	1
DOIs	https://doi.org/10.1007/s12540-010-0093-9
Publication status	Published - 2010 Feb

Keywords

Electrical properties
Grain boundary
Grain growth
Microstructure
Sintering

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

Access to Document

10.1007/s12540-010-0093-9

Cite this

@article{f7232e3157034120aff103eb4cc1dd41,

title = "Dependence of Al2O3 coating thickness and annealing conditions on microstructural and electrochemical properties of LiCoO 2 film",

abstract = "Porous Y-doped (Ba,Sr)TiO3 ceramics were prepared by the spark plasma sintering of (Ba,Sr)TiO3 powders with different amounts of carbon black, and by subsequently burning out the carbon black acting as a pore precursor. The microstructure, PTCR and gas-sensing characteristics for porous Y-doped (Ba,Sr)TiO3 ceramics were investigated. Spark plasma sintered (Ba,Sr)TiO3 ceramics revealed a very fine microstructure containing submicron-sized grains with a cubic phase and revealed an increased porosity after the carbon black was burned out. As a result of reoxidation treatment, the grain size of the (Ba,Sr)TiO3 ceramics increased to a few and mu;m and the cubic phase transformed into a tetragonal phase. The phase transformation of (Ba,Sr)TiO3 ceramics was affected by grain size. The PTCR jump in the (Ba,Sr)TiO3 ceramics prepared by adding 40 vol.% carbon black showed an excellent value of 4.72 and times; 10 6 , which was ten times higher than the PTCR jump in (Ba,Sr)TiO3 ceramics. The electrical resistivity of the porous (Ba,Sr)TiO3 ceramics was recovered as the atmosphere changed from a reducing gas (N2) to an oxidizing gas (O2) under consecutive heating and cooling cycles.",

keywords = "Electrical properties, Grain boundary, Grain growth, Microstructure, Sintering",

author = "Park, {Sun Gyu} and Lee, {Seong Rae} and Cho, {Won Il} and Cho, {Byung Won}",

note = "Funding Information: This work was financially supported by the program Development of Basic Technology for Next Generation Li-Composite Secondary Batteries of KIST.",

year = "2010",

month = feb,

doi = "10.1007/s12540-010-0093-9",

language = "English",

volume = "16",

pages = "93--98",

journal = "Metals and Materials International",

issn = "1598-9623",

publisher = "Korean Institute of Metals and Materials",

number = "1",

}

TY - JOUR

T1 - Dependence of Al2O3 coating thickness and annealing conditions on microstructural and electrochemical properties of LiCoO 2 film

AU - Park, Sun Gyu

AU - Lee, Seong Rae

AU - Cho, Won Il

AU - Cho, Byung Won

N1 - Funding Information: This work was financially supported by the program Development of Basic Technology for Next Generation Li-Composite Secondary Batteries of KIST.

PY - 2010/2

Y1 - 2010/2

N2 - Porous Y-doped (Ba,Sr)TiO3 ceramics were prepared by the spark plasma sintering of (Ba,Sr)TiO3 powders with different amounts of carbon black, and by subsequently burning out the carbon black acting as a pore precursor. The microstructure, PTCR and gas-sensing characteristics for porous Y-doped (Ba,Sr)TiO3 ceramics were investigated. Spark plasma sintered (Ba,Sr)TiO3 ceramics revealed a very fine microstructure containing submicron-sized grains with a cubic phase and revealed an increased porosity after the carbon black was burned out. As a result of reoxidation treatment, the grain size of the (Ba,Sr)TiO3 ceramics increased to a few and mu;m and the cubic phase transformed into a tetragonal phase. The phase transformation of (Ba,Sr)TiO3 ceramics was affected by grain size. The PTCR jump in the (Ba,Sr)TiO3 ceramics prepared by adding 40 vol.% carbon black showed an excellent value of 4.72 and times; 10 6 , which was ten times higher than the PTCR jump in (Ba,Sr)TiO3 ceramics. The electrical resistivity of the porous (Ba,Sr)TiO3 ceramics was recovered as the atmosphere changed from a reducing gas (N2) to an oxidizing gas (O2) under consecutive heating and cooling cycles.

AB - Porous Y-doped (Ba,Sr)TiO3 ceramics were prepared by the spark plasma sintering of (Ba,Sr)TiO3 powders with different amounts of carbon black, and by subsequently burning out the carbon black acting as a pore precursor. The microstructure, PTCR and gas-sensing characteristics for porous Y-doped (Ba,Sr)TiO3 ceramics were investigated. Spark plasma sintered (Ba,Sr)TiO3 ceramics revealed a very fine microstructure containing submicron-sized grains with a cubic phase and revealed an increased porosity after the carbon black was burned out. As a result of reoxidation treatment, the grain size of the (Ba,Sr)TiO3 ceramics increased to a few and mu;m and the cubic phase transformed into a tetragonal phase. The phase transformation of (Ba,Sr)TiO3 ceramics was affected by grain size. The PTCR jump in the (Ba,Sr)TiO3 ceramics prepared by adding 40 vol.% carbon black showed an excellent value of 4.72 and times; 10 6 , which was ten times higher than the PTCR jump in (Ba,Sr)TiO3 ceramics. The electrical resistivity of the porous (Ba,Sr)TiO3 ceramics was recovered as the atmosphere changed from a reducing gas (N2) to an oxidizing gas (O2) under consecutive heating and cooling cycles.

KW - Electrical properties

KW - Grain boundary

KW - Grain growth

KW - Microstructure

KW - Sintering

UR - http://www.scopus.com/inward/record.url?scp=78149439911&partnerID=8YFLogxK

U2 - 10.1007/s12540-010-0093-9

DO - 10.1007/s12540-010-0093-9

M3 - Article

AN - SCOPUS:78149439911

SN - 1598-9623

VL - 16

SP - 93

EP - 98

JO - Metals and Materials International

JF - Metals and Materials International

IS - 1

ER -