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公开(公告)号：KR100329126B1
公开(公告)日：2002-03-21
申请号：KR1020000010895
申请日：2000-03-04
Applicant: 한국과학기술원
IPC: H01B3/12
Abstract: 본 발명은 높은 유전상수와 낮은 유전손실을 가지는 BaTiO
3 유전체의 제조방법에 관한 것으로 보다 상세하게는 유전체 제조공정중 소결공정 전에 환원성 분위기에서 전열처리를 통하여 BaTiO
3 의 평균입자크기를 작게 함으로써 높은 유전상수와 낮은 유전손실을 가지는 BaTiO
3 유전체의 제조방법에 관한 것이다.
본 발명은 순수한 BaTiO
3 뿐만 아니라 어떠한 첨가물이 첨가되더라도 BaTiO
3 를 소결전에 액상형성온도 이하 환원성 분위기에서 간단한 열처리를 통하여 평균입자크기가 매우 작고 상대밀도가 큰 소결체를 얻을 수 있다는 큰 장점을 가지고 있다.-
公开(公告)号：KR100329120B1
公开(公告)日：2002-03-21
申请号：KR1019990013582
申请日：1999-04-16
Applicant: 한국과학기술원
IPC: C04B35/10
Abstract: 본발명은알루미나계소결체를소결분위기보다산소분압이높은분위기에서열처리함으로써표면개질층을형성하는공정과그에의하여표면개질된알루미나계단상, 복합세라믹스에관한것이다. 본발명에서밝혀낸표면개질알루미나계세라믹스의제조방법은 Fe 등의첨가제를포함하는분말성형체를상대적으로산소분압이낮은분위기(N, 95N-5H, H등)에서소결한후 그보다산소분압이높은분위기(80N-20O, O등)에서열처리하는공정으로이루어진다. 이에의하면알루미나계재료의표면에휘어진입계구조를가지는입계이동층을형성시킴으로써, 미세균열영역에서의인성을증진시킬수 있고또한비교적간단한열처리공정만을추가하여기존의알루미나세라믹스제조라인에적용하여제품을생산할수 있는효과가있다.
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公开(公告)号：KR1019960001657B1
公开(公告)日：1996-02-03
申请号：KR1019930003376
申请日：1993-03-06
Applicant: 한국과학기술원
IPC: C04B35/47
CPC classification number: C04B41/5041 , C04B41/009 , C04B41/87 , C04B41/4556 , C04B35/47
Abstract: The grain boundary-controlled dielectric strontium titanate is prepared by (A) cold pressure molding a mixture of BaTiO3 and CaTiO3 having the ratio 1±0.2 of BaTiO3 to CaTiO3 by surrounding a SrTiO3 sintered body, (B) heat treating the above formed body in order to diffuse BaTiO3 and CaTiO3 into the SrTiO3 sintered body at 1,200-1,400 deg.C for 5-30 hours under the H2 and N2 atmosphere with the H2/N2 ratio of 9:95, and (C) oxidizing the heat treated body at 900-1,200 deg.C for 0.1-5 hours under the oxygen atmosphere.
Abstract translation: 晶界控制的电介质锶钛酸盐是通过（A）通过围绕SrTiO 3烧结体将BaTiO3与CaTiO3的比率1±0.2进行冷加压成型的方法，（B）将上述成形体进行热处理， 为了在H2 / N2比为9:95的H 2和N 2气氛下，将BaTiO 3和CaTiO 3在1,200-1,400℃下向SrTiO3烧结体中扩散5-30小时，（C）将热处理体氧化 在氧气氛下900-1200℃，0.1-5小时。
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公开(公告)号：KR1019960000500B1
公开(公告)日：1996-01-08
申请号：KR1019920021432
申请日：1992-11-14
Applicant: 한국과학기술원
IPC: C01G55/00
CPC classification number: C04B35/4508 , C04B35/653 , H01L39/2419 , Y10S505/725 , Y10S505/74 , Y10S505/741 , Y10S505/742 , Y10S505/78 , Y10S505/785 , Y10S505/813 , Y10S505/821
Abstract: The improved method comprises (A) synthesizing liquid phase generated powder (3BaCuO2+2CuO) by mixing Ba and Cu in a ratio of 3:5, followed by calcining the mixture at 870 deg.C for 26 hours, (B) synthesizing Y2BaCuO5 powder by mixing Y, Ba and Cu in a ratio of 2:1:1, followed by calcinating the mixture at 925 deg.C for 23 hours and sintering the cold pressure moulded Y2BaCuO5 powder at 1,050 deg.C for 15 hours, and (C) surrounding Y2BaCuO5 sintered body with the liquid-phase generated powder and thermal-treating at 800-1,000 deg.C for 15-50 hours under the oxygen atmosphere.
Abstract translation: 改进的方法包括（A）通过混合比例为3:5的Ba和Cu合成液相产生的粉末（3BaCuO2 + 2CuO），然后在870℃下煅烧26小时，（B）合成Y2BaCuO5粉末 通过将Y，Ba和Cu以2:1:1的比例混合，然后在925℃下煅烧该混合物23小时，并将冷压成型的Y2BaCuO5粉末在1050℃下烧结15小时，和（C ）将Y2BaCuO5烧结体与液相产生粉末并在氧气氛下在800-1,000℃热处理15-50小时。
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Patent Agency Ranking
公开(公告)号：KR1019940011363A
公开(公告)日：1994-06-21
申请号：KR1019920021432
申请日：1992-11-14
Applicant: 한국과학기술원
IPC: C01G55/00
Abstract: 본 발명은 Y : Ba : Cu의 비가 2:1:1인 소결체를 액상 형성 분말로 둘러싸서 압분체를 만들고 이를 YBa
2 Cu
3 O
7-x 의 포정 반응 온도 이하의 온도에서 등온 열처리하는 것으로 이루어지는 YBa
2 Cu
3 0
7-x 초전도체의 제조 방법이 제공된다. 이 방법에 의해 제조된 YBa
2 Cu
3 0
7-x 초전도체는 입자들이 한 방향으로 배열되어 높은 임계 전류 밀도를 갖는다.-
公开(公告)号：KR1020110038210A
公开(公告)日：2011-04-14
申请号：KR1020090095404
申请日：2009-10-08
Applicant: 한국과학기술원
IPC: H01L41/02
CPC classification number: H01L41/0815 , C04B35/491 , H01L41/1876 , H01L41/1878 , H01L41/311 , H01L41/39
Abstract: PURPOSE: A flexible piezoelectric device and a manufacturing method thereof are provided to stably rectify a current property by electrically connecting a plurality of unit piezoelectric devices and a capacitor to the same flexible substrate. CONSTITUTION: A piezoelectric device layer is laminated on a sacrificial substrate. The piezoelectric device layer is processed on the sacrificial substrate at a high temperature. A piezoelectric device(551) is formed by patterning the piezoelectric device layer. The piezoelectric device is separated from the sacrificial substrate by etching the sacrificial substrate. After the piezoelectric device is connected to a transfer layer, the piezoelectric device is transferred to the flexible substrate.
Abstract translation: 目的：提供一种柔性压电器件及其制造方法，以通过将多个单元压电器件和电容器电连接到相同的柔性衬底来稳定地校正电流特性。 构成：在牺牲基板上层压压电器件层。 压电器件层在高温下在牺牲基片上进行处理。 通过图案化压电元件层形成压电元件（551）。 通过蚀刻牺牲衬底将压电器件与牺牲衬底分离。 在将压电元件连接到转印层之后，将压电元件转印到柔性基板上。
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公开(公告)号：KR1020000066471A
公开(公告)日：2000-11-15
申请号：KR1019990013582
申请日：1999-04-16
Applicant: 한국과학기술원
IPC: C04B35/10
CPC classification number: C04B35/10 , C04B35/62645 , C04B2235/3272 , C04B2235/658
Abstract: PURPOSE: A surface modified alumina-based ceramics and preparation thereof are provided, which increase short-crack toughness and adapt to a conventional ceramic manufacture line by adding a simple heat-treating process. CONSTITUTION: The surface modified alumina-based ceramics are produced by sintering Al2O3 formed body containing Fe whose content is 0.01-20 wt.% of Al2O3, being calculated in terms of Fe2O3, in a lower O2 partial pressure atmosphere(N2, 95N2-5H2, H2, etc.), followed by heat-treating at 1000-1600°C for a few min-hrs. in a higher O2 partial pressure atmosphere(80N2-20O2, O2) than that of sintering.
Abstract translation: 目的：提供一种表面改性氧化铝基陶瓷及其制备方法，通过添加简单的热处理工艺，可提高短裂纹韧性，适应传统陶瓷生产线。 构成：表面改性氧化铝基陶瓷通过在低O2分压气氛（N 2，95 N 2 -5 H 2）中烧结含Fe为0.01-20重量％的Al 2 O 3的Al 2 O 3成形体，按Fe 2 O 3计算 ，H 2等），然后在1000-1600℃下热处理几分钟。 在较高的O2分压气氛（80N2-20O2，O2）比烧结。
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公开(公告)号：KR1019930004555B1
公开(公告)日：1993-06-01
申请号：KR1019900008950
申请日：1990-06-18
Applicant: 한국과학기술원
IPC: C04B35/10
Abstract: The alumina based ceramic composite having high fracture toughness is composed of alumina and metallic niobium as major components. The matrices comprise alumina, alumina-zirconia, alumina-titanium carbide, alumina-silicon carbide whisker or alumina-zirconia-silicon carbide whisker etc., and niobium oxide is used as the source of dispersed particles. The ceramic composite is prepared by (a) homogeneously dispersing niobium particles in the matrix by mixing starting materials which are Al2O3, ZrO2, ZrAl2 and Nb2O5 etc., and (b) reaction sintering of the molded body in inert atmosphere at 1600-1750 deg.C for 30 mins.
Abstract translation: 具有高断裂韧性的氧化铝基陶瓷复合材料以氧化铝和金属铌为主要成分。 基质包括氧化铝，氧化铝 - 氧化锆，氧化铝 - 碳化钛，氧化铝 - 碳化硅晶须或氧化铝 - 氧化锆 - 碳化硅晶须等，并且使用铌氧化物作为分散颗粒的来源。 （a）通过（a）通过混合Al 2 O 3，ZrO 2，ZrAl 2和Nb 2 O 5等的原料将铌颗粒均匀地分散在基质中制备陶瓷复合材料，和（b）在1600-1750度的惰性气氛中反应烧结成型体 30分钟。
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