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국회도서관 홈으로 정보검색 소장정보 검색

초록보기

BNKT Ceramics, one of the representative Pb free based piezoelectric ceramics, constitutes a perovskite(ABO3) structure. At this time, the perovskite structure (ABO3) is in the form where the corners of the octahedrons are connected, and in the unit cell, two ions, A and B, are cations, A ion is located at the body center, B ion is located at each corner, and an anion O is located at the center of each side. Since Bi, Na, and K sources constituting the A site are highly volatile at a sintering temperature of 1100℃ or higher, it is difficult to maintain uniformity of the composition. In order to solve this problem, there should be suppression of volatilization of the A site material or additional compensation of the volatilized. In this study, the basic composition of BNKT Ceramics was set to Bi₀.₅(Na₀.₇₈K0.₂₂)₀.₅TiO₃ (= BNKT), and volatile site (Bi, Na, and K sources) were coated in the form of a shell to compensate additionally for the A site ions. In addition, the physical and electrical properties of BNKT and its coated with shell additives(= @BNK) were compared and analyzed, respectively. As a result of analyzing the crystal structure through XRD, both BNKT(Core) and @BNK(Shell) had perovskite phases, and the crystallinity was almost similar. Although the Curie temperature of the two sintered bodies was almost the same (TC = 290 ~ 300 ℃), it was confirmed that the d33 (piezoelectric coefficient) and Pr (residual polarization) values were different. The experimental results indicated that the additional compensation for a shell additive causes the coarsening, resulting in a decrease in sintering density and Pr(remanent polarization). However, coating shell additives to compensate for A site ion is an effective way to suppress volatilization. Based on these experimental results, it would be the biggest advantage to develop an eco-friendly material (Lead-free) that replaced lead (Pb), which is harmful to the human body. This lead-free piezoelectric material can be applied to a biomedical device or products(ex. earphones (hearing aids), heart rate monitors, ultrasonic vibrators, etc.) and skin beauty improvement products (mask packs for whitening and wrinkle improvement).

권호기사

권호기사 목록 테이블로 기사명, 저자명, 페이지, 원문, 기사목차 순으로 되어있습니다.
기사명 저자명 페이지 원문 목차
딥러닝을 이용한 구강 스캐너 이미지 내 치아 영역 실시간 검출 = Real-time tooth region detection in intraoral scanner images with deep learning 박나윤, 김지훈, 김태민, 송경진, 변유진, 강민주, 전경구, 김재곤 p. 1-6

재해기상 언론기사 빅데이터를 활용한 피해정보 자동 분류기 개발 = Developing and evaluating damage information classifier of high impact weather by using news big data 조수지, 이기광 p. 7-14

바이오 메디컬용 코어-쉘 구조의 Bi0.5(Na0.78K0.22)0.5TiO3계 무연압전세라믹 소재의 개발 = Development of Bi0.5(Na0.78K0.22)0.5TiO3 lead-free piezoelectric ceramic material with core-shell structure for biomedical 윤성준, 배준수 p. 15-22

사용자 편의성을 향상시킨 스마트 시티용 냉·온열 벤치 시스템 개발 = Development of cooling and heating bench system with improved user convenience for smart city 이준, 오승용, 권대규 p. 23-31

광고 및 재난상황에 적용 가능한 실내용 바닥광고 조명장치의 기술사업화 방안 연구 = A study on technology commercialization of indoor floor advertising lighting devices applicable to advertisements and disaster situations 김광수, 이운식 p. 32-40

농업 분야 국가 R&D 기술이전 사업화 성공 요인 분석 = A study on the success factors of national R&D commercialization in agriculture 송영헌, 이정인, 김준기, 황의웅, 엄인용 p. 41-58

Deep Blue LED 광원과 형광체를 이용한 초고연색 백색 인공태양광 LED 소자의 개발 = Development & reliability verification of ultra-high color rendering white artificial sunlight LED device using deep blue LED light source and phosphor 안종욱, 권대규 p. 59-68

어선 선체의 탄소섬유복합재 적용을 위한 구조 강도 특성 연구 = A study of structural strength characteristics for application of carbon composites in fishing vessel hull 이해수, 이형원, 최승준, 오명준 p. 69-77

기술이전 데이터를 활용한 TF-IDF기반 특허추천 알고리즘 연구 = A research on TF-IDF-based patent recommendation algorithm using technology transfer data 김준기, 배준수, 송영헌, 정병호 p. 78-88

중소기업의 ESG 경영 실천 지표 구성 = Constructing ESG management performance indicators for small and medium-sized enterprises : focusing on the automotive parts manufacturing industry : 자동차부품제조업을 중심으로 방정훈, 이운식 p. 89-100

휴대용 보일러튜브 건전성 평가시스템 개발 = Development of portable boiler tube health evaluation system 이창민, 이한상, 김범신 p. 101-108

Impact of quality factors on platform-based decisions = 플랫폼 기반 의사결정 품질 요인의 영향력 연구 Sung Bok Yoon, Ho Jun Song, Wan Seon Shin p. 109-122

ProphetNet 모델을 활용한 시계열 데이터의 열화 패턴 기반 Health Index 연구 = A study on the health index based on degradation patterns in time series data using ProphetNet model 원선주, 김용수 p. 123-138

메탈부쉬 누락예방을 위한 데이터마이닝 기법의 적용 및 비교 = Application and comparison of data mining technique to prevent metal-bush omission 고상현, 이동주 p. 139-147

AHP 기법을 활용한 여객기의 화물기로의 개조사업 성공요인 분석 = Analysis of success factors for converting passenger aircrafts to freighters using AHP 조광조, 이현철 p. 148-160

3차원 보행 영상 기반 퇴행성 관절염 환자 분류 알고리즘 개발 = Developing degenerative arthritis patient classification algorithm based on 3D walking video 강태호, 성시열, 한상혁, 박동현, 강성우 p. 161-169

토픽모델링을 활용한 한국산업경영시스템학회지의 최근 연구주제 분석 = Recent research trend analysis for the Journal of Society of Korea Industrial and Systems Engineering using topic modeling 박동준, 구평회, 오형술, 윤민 p. 170-185

Development of a framework for improvement of sensor data quality from weather buoys = 해양기상부표의 센서 데이터 품질 향상을 위한 프레임워크 개발 Ju-Yong Lee, Jae-Young Lee, Jiwoo Lee, Sangmun Shin, Jun-hyuk Jang, Jun-Hee Han p. 186-197

금융권 플랫폼 비즈니스의 서비스 품질 요인간 구조적 관계에 대한 연구 = Structural relationship and evaluation factors in financial platform business 허훈 p. 198-208

프로젝트 관리가 공동주택 건설의 하자 발생에 미치는 영향 = Investigating the impact of project management on construction defects in housing projects : with a focus on project manager experience : 프로젝트 매니저 경험의 조절효과를 중심으로 이영준, 김승철, 오민정, 최성용 p. 209-220

프로젝트 리스크 관리(PRM)가 프로젝트 성공에 미치는 효과성 분석 = Analysis of the effectiveness of project risk management (PRM) on the project success : focused on the implementation phase of overseas construction projects : 해외건설사업 수행단계 전반을 중심으로 정설림, 김대철 p. 221-230

Analyzing the impact of consultant and project manager competencies on business performance mediated by consulting performance = 컨설턴트 역량과 프로젝트 관리자 역량이 컨설팅 성과를 매개로 경영성과 간의 구조적 관계분석 Rok Lee p. 231-240

프로젝트 거버넌스의 구성요인들이 IT 프로젝트 목표 성과에 미치는 영향 = The impact of project governance factors on IT project objectives performance 김정수, 김승철, 김희경, 이창원 p. 241-250

거주인구의 시공간 변화 및 영향요인 분석 = Exploring spatio-temporal patterns of population and its influential factors in Jeonju : 전라북도 전주시 사례를 중심으로 양지철, 김주애, 조국, 이상완 p. 251-258

지적재조사 드론 영상 활용방안 연구 = A study on the using drone images in cadastral resurvey 임거배, 배성훈, 이원희, 김보은, 유영주, 김진 p. 259-267

영상 피라미드 기반 영상 모자이크를 위한 접합선 추출 = Seamline detection for image mosaicking with image pyramid 유은진 p. 268-274

딥러닝 기반의 국토모니터링 웹 서비스 개발 = Development of deep learning-based land monitoring web service 공인학, 정동훈, 정구하 p. 275-284

2차원 관로형 지하시설물 정보 품질검증기술 개발 = Development of 2D data quality validation techniques for pipe-type underground facilities 배상근, 김상민, 유은진, 임거배, 정다운 p. 285-292

농업분야 드론영상 메타데이터 표준화 연구 = Standardization research on drone image metadata in the agricultural field 이원희, 배성훈, 김진, 이영재, 임거배 p. 293-302

참고문헌 (20건) : 자료제공( 네이버학술정보 )

참고문헌 목록에 대한 테이블로 번호, 참고문헌, 국회도서관 소장유무로 구성되어 있습니다.
번호 참고문헌 국회도서관 소장유무
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2 Chen, H., Ren, T. L., Wu, X. M., Yang, Y., & Liu, L. T. : Giant electrocaloric effect in lead-free thin film of strontium bismuth tantalite. Applied Physics Letters, 2009, Vol. 94, No. 18. 미소장
3 Chiang, Y.M., Farrey, G.W., and Soukhojak, A.N., Lead-free high-strain single-crystal piezoelectrics in the alkaline–bismuth–titanate perovskite family, Applied Physics Letters, 1998, Vol. 73, No. 25, pp. 3683-3685. 미소장
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