KR101339396B1 - 적층 세라믹 커패시터용 내환원성 저온소성 유전체 세라믹 조성물 및 그의 제조방법 - Google Patents
적층 세라믹 커패시터용 내환원성 저온소성 유전체 세라믹 조성물 및 그의 제조방법 Download PDFInfo
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Abstract
Description
도 2는 도 1에 도시된 적층 세라믹 커패시터용 내환원성 저온소성 유전체 세라믹 조성물의 제조과정을 나타낸 흐름도,
도 3은 도 2에 도시된 유리 분말의 제조과정을 나타낸 흐름도.
12: 내부전극 13: 외부전극
Claims (8)
- 제1성분 91~98wt%와 제2성분 2~9wt%로 이루어지고, 상기 제1성분은 주성분인 BaTiO3 94~98wt%와, 망목구조를 갖는 유리 분말으로 이루어지는 제1부성분 0.5~2wt%와, MgO, Cr2O3 및 Mn3O4 중 하나 이상으로 이루어지는 제2부성분 1~4wt%로 이루어지며, 상기 제2성분은 (Ba1-x-yCaySrx)(ZryTi1-y)O3 이며, 상기 x와 y는 각각 0.2 ≤ x ≤ 0.8, 0.03 ≤ y ≤ 0.15 을 만족하고,
상기 제1성분의 주성분인 망목 구조를 갖는 유리 분말은 aBa계 조성물-bSi계 조성물-cLi계 조성물-dB계 조성물-fRF계 조성물로 이루어지고, 상기 a+b+c+d+f=100 mol%로 상기 3≤ a ≥25 mol%, 20≤ b ≥30 mol%, 5≤ c ≥20 mol%, 30≤ d ≥50 mol%, 1≤ f ≥10 mol%를 만족하며, 상기 Ba계 조성물은 BaO와 BaCO3 중 하나이고 상기 Si계 조성물은 SiO2이며 상기 Li계 조성물은 Li2O, Li2CO3 및 LiOH 중 하나이며 B계 조성물은 B2O3와 H3BO3 중 하나이며, F계 조성물은 MgF2, CaF2, AlF3 및 TiF4 중 하나고,
상기 제1성분의 주성분인 BaTiO3의 평균 입경은 제2성분보다 크며, 상기 제1성분의 주성분인 BaTiO3은 평균 입경이 50 내지 150㎚이며, 비표면적이 4 내지 20㎡/g이며, 상기 제2성분은 평균 입경이 30 내지 100㎚이며, 비표면적이 3 내지 25㎡/g인 것을 특징으로 하는 적층 세라믹 커패시터용 유전체 세라믹 조성물. - 삭제
- 삭제
- 삭제
- 삭제
- 제1성분 91~98wt%와 제2성분 2~9wt%을 준비하는 단계와;
상기 제1성분과 상기 제2성분이 각각 준비되면 솔리드 로딩(Solid loading)이 25 내지 35%가 되도록 초순수 첨가하고 수계 분산제 1~4%를 첨가한 후 볼 밀링(Ball-Milling)을 이용하여 20 내지 30시간 습식 혼합하는 단계와;
제1성분과 제2성분이 혼합되면 80~200℃에서 건조하는 단계와;
제1성분과 제2성분의 혼합물이 건조되면 700~900℃에서 3~5시간 동안 열처리하는 단계로 구성되며,
상기 제1성분과 상기 제2성분을 각각 준비하는 단계에서 제1성분은 주성분인 BaTiO3 94~98wt%와, 망목구조를 갖는 유리 분말으로 이루어지는 제1부성분 0.5~2wt%와, MgO, Cr2O3 및 Mn3O4 중 하나 이상으로 이루어지는 제2부성분 1~4wt%로 이루어지며, 상기 제2성분은 (Ba1-x-yCaySrx)(ZryTi1-y)O3 이며, 상기 x와 y는 각각 0.2 ≤ x ≤ 0.8, 0.03 ≤ y ≤ 0.15 을 만족하고,
상기 제1성분과 상기 제2성분을 각각 준비하는 단계에서 제1성분의 제1부성분의 제조방법은 출발물질을 준비하는 단계와; 상기 출발물질이 준비되면 각각을 혼합한 후 1200~1600℃에서 용융하는 단계와; 상기 용융이 완료되면 급냉시켜 유리 플레이크(glass flake)를 제조한 후 건식 분쇄하여 유리 분말을 제조하는 단계와; 상기 분쇄된 유리 분말을 열플라즈마 처리를 통하여 30~100nm의 평균입경을 갖는 구형 분체로 제조하는 단계와; 상기 열플라즈마 처리가 완료되면 유리분말의 분급을 실시하는 단계로 이루어지며, 상기 출발물질을 준비하는 단계에서 출발물질은 aBa계 조성물-bSi계 조성물-cLi계 조성물-dB계 조성물-fRF계 조성물로 이루어지며, Ba계 조성물은 BaO와 BaCO3 중 하나가 사용되고, Si계 조성물은 SiO2가 사용되며, Li계 조성물은 Li2O, Li2CO3 및 LiOH 중 하나가 사용되며, B계 조성물은 B2O3와 H3BO3 중 하나가 사용되며, F계 조성물은 MgF2, CaF2, AlF3 및 TiF4 중 하나가 사용되며,
상기 열플라즈마 처리를 통하여 30~100nm의 평균입경을 갖는 구형 분체로 제조하는 단계에서 열플라즈마 처리는 RF(Radio Frequency)플라즈마 토치가 사용되며, 상기 RF플라즈마 토치를 이용한 열플라즈마 처리 온도는 3000~8000℃인 것을 특징으로 하는 적층 세라믹 커패시터용 유전체 세라믹 조성물의 제조방법. - 삭제
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KR20160023439A (ko) | 2014-08-22 | 2016-03-03 | 삼성전기주식회사 | 저온 소성용 유전체 조성물, 이를 포함하는 적층 세라믹 전자 부품 및 적층 세라믹 전자 부품의 제조 방법 |
KR20240109080A (ko) | 2023-01-03 | 2024-07-10 | 삼화콘덴서공업주식회사 | 적층 세라믹 커패시터용 유전체 세라믹 조성물 |
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