Design and applications of low-temperature barium titanate-based conductive oxides
碩士 === 國立臺灣大學 === 材料科學與工程學研究所 === 95 === The conductivities of barium titanate (BaTiO3) systems doped with yittrium oxide (Y2O3) and Zr3Y (97mol.% ZrO2:3mol.%Y2O3)are studied in this thesis. Different amounts of Y2O3 and Zr3Y were added to study their influences on conductivity. Conventional oxide-m...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2007
|
Online Access: | http://ndltd.ncl.edu.tw/handle/86978996781466160587 |
id |
ndltd-TW-095NTU05159049 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-095NTU051590492015-12-07T04:04:14Z http://ndltd.ncl.edu.tw/handle/86978996781466160587 Design and applications of low-temperature barium titanate-based conductive oxides 鈦酸鋇導體化特性於設計低溫導體氧化物上之應用 Chen-Yu Lin 林貞妤 碩士 國立臺灣大學 材料科學與工程學研究所 95 The conductivities of barium titanate (BaTiO3) systems doped with yittrium oxide (Y2O3) and Zr3Y (97mol.% ZrO2:3mol.%Y2O3)are studied in this thesis. Different amounts of Y2O3 and Zr3Y were added to study their influences on conductivity. Conventional oxide-mixing methods were adopted to produce the BaTiO3-based ceramics. The sintering temperature for the ceramics was varied in between 1340-1500℃ to study the influence of sintering temperature on conductivity. For the Y2O3-doped BaTiO3 system, the conductivity is at the highest when the BaTiO3 is doped with 0.1wt%Y2O3. The conductivity decreases significantly when the Y2O3 content increases to 1wt%. For the Zr3Y-doped BaTiO3 system, the conductivity with 5wt%Zr3Y doping is similar to that with 0.1wt% Y2O3 doping. Furthermore, if the Zr3Y doping is less than 0.5wt%, the conductivity is low. It is therefore concluded that in both the Y2O3-and Zr3Y-doped BaTiO3 systems, the dominant factor for the conductivity is the amount of yittrium doping. The origin of conductivity for the Y2O3-and Zr3Y-doped BaTiO3 system is investigated by studying the evolution of conductivity at different temperatures and reducing atmospheres. Donor-doped and acceptor-doped BaTiO3 systems are therefore defined. It is found that the room-temperature conductivity of BaTiO3 is governed by the amounts of its chemical defects, such as free electrons, electron holes, oxygen vacancies, and cation vacancies. 謝宗霖 2007 學位論文 ; thesis 87 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 國立臺灣大學 === 材料科學與工程學研究所 === 95 === The conductivities of barium titanate (BaTiO3) systems doped with yittrium oxide (Y2O3) and Zr3Y (97mol.% ZrO2:3mol.%Y2O3)are studied in this thesis. Different amounts of Y2O3 and Zr3Y were added to study their influences on conductivity. Conventional oxide-mixing methods were adopted to produce the BaTiO3-based ceramics. The sintering temperature for the ceramics was varied in between 1340-1500℃ to study the influence of sintering temperature on conductivity.
For the Y2O3-doped BaTiO3 system, the conductivity is at the highest when the BaTiO3 is doped with 0.1wt%Y2O3. The conductivity decreases significantly when the Y2O3 content increases to 1wt%. For the Zr3Y-doped BaTiO3 system, the conductivity with 5wt%Zr3Y doping is similar to that with 0.1wt% Y2O3 doping. Furthermore, if the Zr3Y doping is less than 0.5wt%, the conductivity is low. It is therefore concluded that in both the Y2O3-and Zr3Y-doped BaTiO3 systems, the dominant factor for the conductivity is the amount of yittrium doping. The origin of conductivity for the Y2O3-and Zr3Y-doped BaTiO3 system is investigated by studying the evolution of conductivity at different temperatures and reducing atmospheres. Donor-doped and acceptor-doped BaTiO3 systems are therefore defined. It is found that the room-temperature conductivity of BaTiO3 is governed by the amounts of its chemical defects, such as free electrons, electron holes, oxygen vacancies, and cation vacancies.
|
author2 |
謝宗霖 |
author_facet |
謝宗霖 Chen-Yu Lin 林貞妤 |
author |
Chen-Yu Lin 林貞妤 |
spellingShingle |
Chen-Yu Lin 林貞妤 Design and applications of low-temperature barium titanate-based conductive oxides |
author_sort |
Chen-Yu Lin |
title |
Design and applications of low-temperature barium titanate-based conductive oxides |
title_short |
Design and applications of low-temperature barium titanate-based conductive oxides |
title_full |
Design and applications of low-temperature barium titanate-based conductive oxides |
title_fullStr |
Design and applications of low-temperature barium titanate-based conductive oxides |
title_full_unstemmed |
Design and applications of low-temperature barium titanate-based conductive oxides |
title_sort |
design and applications of low-temperature barium titanate-based conductive oxides |
publishDate |
2007 |
url |
http://ndltd.ncl.edu.tw/handle/86978996781466160587 |
work_keys_str_mv |
AT chenyulin designandapplicationsoflowtemperaturebariumtitanatebasedconductiveoxides AT línzhēnyú designandapplicationsoflowtemperaturebariumtitanatebasedconductiveoxides AT chenyulin tàisuānbèidǎotǐhuàtèxìngyúshèjìdīwēndǎotǐyǎnghuàwùshàngzhīyīngyòng AT línzhēnyú tàisuānbèidǎotǐhuàtèxìngyúshèjìdīwēndǎotǐyǎnghuàwùshàngzhīyīngyòng |
_version_ |
1718146235986083840 |