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公开(公告)号：KR1019950026845A
公开(公告)日：1995-10-16
申请号：KR1019940005128
申请日：1994-03-15
Applicant: 한국과학기술연구원
IPC: C04B35/48
Abstract: 본 발명은 고인성ㆍ내저온열화 특성을 갖는 정방성 지르코니아 복합체의 제조방법에 관한 것이다. 본 발명은 88~90mol% ZrO
2 , 5~7mol% Y
2 O
3 , 3~6mol% Nb
2 O
5 나 Ta
2 O
5 로 이루어진 비전이성 TZP 또는 82~86mol% ZrO
2 에 Y
2 O
3 와 Nb
2 O
5 나 Nb
2 O
5 가 각각 7~9mol% 첨가되어 이루어진 비전이성 TZP에 93~97mol% ZrO
2 , 2~4mol% Y
2 O
3 , 1~3mol% Nb
2 O
5 나 Ta
2 O
5 로 이루어진 전이성 TZP 60wt% 이하로 혼합하여 소결하는 방법이다. 본 발명의 방법에 의해 제조된 TZP 복합체는 100~400℃의 저온영역에서 장시간 노출시에도 단사장 지르코니아로의 상전이에 의한 저온열화를 나타내지 않으면서도 고인성을 나타내는 장점이 있다.-
公开(公告)号：KR100277549B1
公开(公告)日：2001-01-15
申请号：KR1019980028586
申请日：1998-07-15
Applicant: 한국과학기술연구원
IPC: C04B35/64 , C04B35/01 , C04B35/56 , C04B35/622
Abstract: 출발물질로서 대기 중에서 안정하고 질산에 잘 용해되는 산화물과 탄화물, 임의로 금속 및 물에 잘 녹는 금속염을 사용하고 이를 질산 용매에 용해시킨 다음 얻어진 투명한 용액에 글리신을 비롯한 아미노산을 첨가하여 자발연소반응을 거쳐 결정성 세라믹 분말을 얻는다.
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Patent Agency Ranking
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公开(公告)号：KR1019970001263B1
公开(公告)日：1997-02-04
申请号：KR1019960050644
申请日：1996-10-31
Applicant: 한국과학기술연구원
IPC: C04B35/106
CPC classification number: C04B35/488
Abstract: Method for manufacturing tetragonal zirconia polycrystal complex is provided which has high toughness without exhibiting low temperature degradation due to phase transition into monoclinic zirconia polycrystal even under exposure for log time at a low temperature range of 100 to 400 deg. C. Transitional tetragonal zirconia polycrystal produced from mixing 82 to 86 mol% of ZrO2 and 7 to 9 mol% of Y2O3, Nb2O5 and Ta2O5 respectively is mixed with not more than 60wt% of non-transitional tetragonal zirconia polycrystal having a composition of 93 to 97 mol% of ZrO2, 2 to 4 mol% of Y2O3 and 1 to 3 mol% of Nb2O5 or Ta2O5, and sintered at 1,500 deg. C or more for 2 to 10 hours, to produce the tetragonal zirconia polycrystal complex.
Abstract translation: 提供四方晶氧化锆多晶配合物的制造方法，即使在100〜400度的低温范围内，即使在曝光时间对数时，由于相转变成单斜晶氧化锆多晶而具有高韧性而不显示低温降解。 C.将82〜86mol％的ZrO 2和7〜9mol％的Y 2 O 3，Nb 2 O 5和Ta 2 O 5分别混合的过渡四方晶氧化锆多晶与不大于60wt％的非过渡四方晶氧化锆多晶相混合，组成为93〜 ZrO2为97摩尔％，Y2O3为2〜4摩尔％，Nb2O5或Ta2O5为1〜3摩尔％，烧结温度为1500度。 ℃以上2〜10小时，生成四方晶氧化锆多晶复合体。
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公开(公告)号：KR1020000008664A
公开(公告)日：2000-02-15
申请号：KR1019980028586
申请日：1998-07-15
Applicant: 한국과학기술연구원
IPC: C04B35/64 , C04B35/01 , C04B35/56 , C04B35/622
CPC classification number: C01G45/1264 , C01G51/68
Abstract: PURPOSE: A process for preparing ceramic powder by dissolving an oxide and a carbide or optionally metal and soluble metal salt, adding glycine, and calcining is provided which makes possible to produce high purity ceramic powder quickly and economically. CONSTITUTION: An oxide and a carbide which are stable in the atmosphere and well soluble in nitric acid or optionally metal and metal salt which are well soluble in water are dissolved in nitric acid, added with glycine and calcined to give ceramic power such as (La, Sr)MnO3, (La, Sr)CoO3, (La, Sr)CoMnO3 or (La, Sr)CoFeO3 crystalline ceramic power. The oxide is selected from La2O3, MnO2 or Fe3O4 and its mixture, the carbide is FeCO3 or SrCO3 and metal is cobalt. For an example, 123.8g La2O3, 28.05g SrCO3, 87.81g MnO2 are dissolved in 420ml nitric acid and 180ml hydroperoxide and added with 300g glycine as fuel in changing a mole ratio of glycine and cation to 0.5, 1. 2. 3. and 4 to give a solution, which is calcined at below 1,000°C in a preheated reactor to give a final product. In the mole ratio of glycine and cation of 2,3, spontaneous combustion reaction is continued furiously to give crystalline ceramic power of (La, Sr)MnO3.
Abstract translation: 目的：提供通过溶解氧化物和碳化物或任选的金属和可溶性金属盐，加入甘氨酸和煅烧来制备陶瓷粉末的方法，其可以快速且经济地制备高纯度陶瓷粉末。 构成：在大气中稳定且易溶于硝酸或可溶于水的金属盐和金属盐的氧化物和碳化物溶解在硝酸中，加入甘氨酸并煅烧得到陶瓷功率，例如（La ，Sr）MnO 3，（La，Sr）CoO 3，（La，Sr）CoMnO 3或（La，Sr）CoFeO 3结晶陶瓷功率。 氧化物选自La2O3，MnO2或Fe3O4及其混合物，碳化物为FeCO3或SrCO3，金属为钴。 例如，将123.8g La 2 O 3，28.05g SrCO 3，87.81g MnO 2溶解在420ml硝酸和180ml氢过氧化物中，并加入300g甘氨酸作为燃料，将甘氨酸和阳离子的摩尔比改为0.5,1.2,3和 得到溶液，其在预热的反应器中在低于1000℃下煅烧，得到最终产物。 甘氨酸和阳离子的摩尔比为2,3，自发燃烧反应持续剧烈，得到（La，Sr）MnO 3的结晶陶瓷功率。
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公开(公告)号：KR1019970001064B1
公开(公告)日：1997-01-25
申请号：KR1019940005128
申请日：1994-03-15
Applicant: 한국과학기술연구원
IPC: C04B35/48
CPC classification number: C04B35/488
Abstract: Tetragonal zirconia polycrystal composite having a high ductility and low- temperature antidegradation properties is manufacturied by mixing nontransposable zirconia with below 60 wt. % of transposable zirconia based on nontransposable zirconia and sintering at 1,550 deg.C for 2-10 hr. Transposable zirconia is poduced by mixing a mixture of 93-97% of ZrO2 and 2-4% of Y2O3 with 1-3% of Nb2O5 or 1-3% OF Ta2O5.
Abstract translation: 具有高延展性和低温抗降解性能的四面体氧化锆多晶复合材料通过将不可转移的氧化锆与低于60wt。 基于非转移性氧化锆的转座氧化锆的％，并在1550℃下烧结2-10小时。 通过将93-97％的ZrO 2和2-4％的Y 2 O 3与1-3％的Nb 2 O 5或1-3％的Ta 2 O 5混合来混合转移的氧化锆。
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