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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 42, Number 6
JKCSEZ 42(6)
December 20, 1998 

 
Title
Application of Response Surface Method for Modelling of Room Temperature Resistivity of (Ba0.8-xSr0.2)YxTiO3

(Ba0.8-xSr0.2)YxTiO3의 상온비저항을 모델링하기 위한 반응표면분석법의 적용
Author
Hyung Chul Moon, Yaeyong Noh, Seungwon Kim, Chul Lee

문형철,노태용,김승원,이철
Keywords
Abstract
바륨, 스트론튬, 이트륨 및 티탄의 질산염과 옥살산을 이요한 습식화학합성법으로 금속-옥살레이트의 침전물을 얻고, 이를 하소하여(Ba0.6-xSr0.2)YxTiO3(BSYT) 분말을 제조하였다. Y의 혼입량, 소결 온도 및 냉각 속도를 실험 인자로 설정하여 BSYT의 상온비저항을 위한 모델식을 반응표면분석법으로 구하였다. 그 결과 Y의 혼입량 변화가 상온비저항에 가장 크게 영향을 미치며, Y의 함량이 약 0.24 mol% 일 때 상온비저항은 최소값을 나타내었다. 실제 실험으로부터 구한 상온비저항 값과 모델식으로부터 계산한 상온비저항 값을 비교한 결과 잘 일치함을 확인하였다.

(Ba0.8-xSr0.2)YxTiO3 (BSYT) powders were prepared by the calcination of metal-oxalate precipitates, which were obtained by wet chemical method using Ba, Sr, Y and Ti-nitrates and oxalic acid. Yttrium content, sintering temperature and cooling rate were taken as experimental factors. Response surface method was applied to modelling of the room temperature resistivity of BSYT. The results indicated that the Yttrium content had larger effect on the room temperature resistivity and minimum room temperature resistivity was at Yttrium content of 0.24 mol%. The validity of a modelling equation was confirmed by comparing the measured room temperature resistivity with the calculated one.

Page
652 - 656
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