최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기한국세라믹학회지 = Journal of the Korean Ceramic Society, v.46 no.2 = no.321, 2009년, pp.189 - 199
박재성 (삼성전기 LCR 사업부) , 김영태 (삼성전기 LCR 사업부) , 허강헌 (삼성전기 LCR 사업부) , 한영호 (성균관대학교 재료공학과)
The Powder characteristics and sintering behavior of
* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
nano size의 BaTiO3를 사용할 경우 중요하게 고려되어야 할 요인은? | 대표적인 수동부품인 MLCC의 경우, 전자기기의 소형화에 따른 수동부품의 downsizing을 구현하기 위해 유전체 두께는 얇아지고 그 적층수는 급격히 증가하는 경향을 보이고 있다. 유전체층의 두께 감소를 위해서는 보다 작은 size(nano size)의 BaTiO3를 사용해야 하며 nano size의 BaTiO3를 사용할 경우 particle의 균일한 분산은 더욱 중요하게 고려되어야 한다. 일반적으로 BaTiO3는 BaCO3와 TiO2를 1000℃ 근처의 고온에서 반응시키는 solid-state reaction 반응을 이용하여 합성 하고 있으나 이러한 고온에서의 하소는 BaTiO3 particle의 입도 분포를 크게 하고 조대화를 유발할 가능성이 있다. | |
고순도이며 narrow한 입도 산포, 높은 균일성을 갖는 미립의 BaTiO3를 합성을 위해 개발된 방법은? | 따라서 최근에는 고순도이며 narrow한 입도 산포, 높은 균일성을 갖는 미립의 BaTiO3를 합성하기 위해 hydrolysis of barium titanate alkoxides,3) sol-gel processing4) 그리고 hydrothermal processing5,6) 등의 다양한 방법이 개발되고 있다. | |
BaTiO3에 additives를 첨가할 경우 분산이 제한적인 이유는? | 이러한 core-shell 구조는 BaTiO3 powder에 다양한 oxide additives를 첨가한 후 소결 함으로써 얻을 수 있는데 BaTiO3에 additives를 첨가하는 가장 일반적인 방법으로는 BaTiO3에 산화물 형태의 additives를 첨가한 후 균일한 분산을 위해 mechanical한 방식으로 mixing하는 것이다. 이 경우 additives의 분산은 제한적일 수 밖에 없는데 그 이유는 산화물 형태의 additives가 미량일 뿐 아니라 대부분 coarse하기 때문이다. 박막화를 구현하기 위해 BaTiO3의 크기가 점점 작아질수록 비표면적의 증가로 인하여 BaTiO3의 응집이 일어날 가능성이 커지며 additives의 균일한 분산도 더욱 어려워질 수 밖에 없다. |
A. Beauger, J. C. Mutin, and J.C. Niepce, “Synthesis Reaction of Metatitanate $BaTiO_3$ : Part 2. Study of Solid-solid Reaction Interfaces,” J. Mater. Sci., 18 3543-50 (1983).
A. Amin, M. A. Spears, and B.M. Kulwicki, “Reaction of Anatase and Rutile with Barium Carbonate,” J. Am. Ceram. Soc., 66 733-38 (1983).
K. S. Mazdiyasni, R. T. Dolloff, and J. S. Smith II, “Preparation of High-purity Submicron Barium Titanate Powders,” J. Am. Ceram. Soc., 52 523-26 (1969).
P. P. Phule and S. H. Risbud, “Low Temperature Synthesis and Dielectric Properties of Ceramics Derived from Amorphous Barium Titanate Gels and Crystalline Powders,” Mater. Sci. Eng., B3 241-47 (1989).
M. Wu, R. Xu, S. Feng, L. Li, D. Chen, and Y. Luo, “The Influence of Anions on the Products of $BaTiO_3$ under Hydrothermal Conditions,” J. Mater. Sci., 31 6201-05 (1996).
P. Pinceloup, C. Courtois, A. Leriche, and B. Thierry, “Hydrothermal Synthesis of Nanometer-sized Barium Titanate Powders : Control of Barium/titanium Ratio, Sintering, and Dielectric Properties,” J. Am. Ceram. Soc., 82 3049-56 (1999).
B. S. Rawal, M. Kahn, and W. R. Buessem, “Grain core- Grain Shell Structure in Barium Titanate-based Dielectrics,” Adv. in Ceram., 1 172-88 (1981).
S. K. Chiang, N. E. Lee, and D. W. Ready, “Core-shell Structure in Doped $BaTiO_3$ ,” Ceram. Bull., 66 1230 (1987).
F. A. Selmi and V. R. W. Amarakoon, “Sol-gel Coating Powders for Processing Electronic Ceramics,” J. Am. Ceram. Soc., 71 934-37 (1988).
W. -H. Shih, D. Kisailus, and Y. Wei, “Silica Coating of Barium Titanate Particles,” Mater. Lett., 24 13-15 (1995).
S. F. Wang and G. O. Dayton, “Dielectric Properties of Finegrain Barium Titanate Based X7R Materials,” J. Am. Ceram. Soc., 82 2677-82 (1999).
B. Aiken, W. P. Hsu, and E. Matijevic, “Preparation and Properties of Uniform Mixed and Coated Colloidal Particles,” J. Mater. Sci., 25 1886-94 (1990).
R. D. Harding , “Heterocoagulation in Mixed Dispersions - Effects of Particle Size, Size Ratio, Relative Concentration and Surface Potential of Colloidal Components,” J. Colloid Interface Sci., 40 164-73 (1972).
T. W. Healy, G. R. Wiese, D. W. Yates, and B.V. Kavangh, “Heterocoagulation in Mixed Oxide Colloidal Dispersions,” J. Colloid Interface Sci., 42 [3] 647-49 (1973).
J. H. Jean and S. M. Yang, “ $Y_2O_2S$ : Eu Red Phosphor Powders Coated with Silica,” J. Am. Ceram. Soc., 83 1928-34 (2000).
R. Chen, A. Cui, X. Wang, Z. Gui, and L. Li, “Structure, Sintering Behavior and Dielectric Properties of Silica-coated $BaTiO_3$ ,” Mat. Lett., 54 314-17 (2002).
W. J. Kim, Y. T. Moon, C.H. Kim, D.K. Kim, and H. Lee, “Coating of Yttria Precursor on AlN Powder by in Situ Precipitation,” J. Mater. Sci. Lett., 13 1349-51 (1994).
C. M. Wang, “Microstructural Homogeneity Improvement in $Si_3N_4$ by a Powder Coating Method,” J. Mater. Sci., 31 4709-18 (1996).
B. Djuricic, D. Mcgarry, and S. Pickering, “The Preparation of Ultrafine Ceria-stabilized Zirconia Particles Coated with Yittria,” J. Mater. Sci. Lett., 12 1320-23 (1993).
D. H. Pearce, A. J. Jickells, and C. B. Ponton, in : P. Duran, J. F. Fernandez (Eds.), Vol.1, pp.231-36, Third Euro-Ceramics, Faenza Editrice, Iberica, Madrid, 1993.
F. A. Selmi and V. R. W. Amarakoon, “Sol-Gel Coating of Powders for Processing Electronic Ceramics”, J. Am. Ceram. Soc., 71 934-37 (1988).
Y. Ogata, Patent No. JP 0558705, 09.03.1993/29.08.1991, CI C01B35/00
Patent No. JP 0558605, 09.03.1993/29.08.1991, CI C01B13/32.
H. -P. Abicht, H. T. Langhammer, and K. -H. Felgner, “The Influence of Silicon on Microstructure and Electrical Properties of La-doped $BaTiO_3$ Ceramics,” J. Mater. Sci., 26 2337-42 (1991).
C. Saucy, I. M. Reaney, and A. J. Bell, “Microstructure and Electromechanical Properties of $BaTiO_3$ - $ZrO_2$ Core?shell Ceramics,” Br. Ceram. Proc., 51 31-52 (1993).
T. Hayashi, T. Itoh, K. Ajima, and K. Sasaki, “Preparation and Properties of $Nb_2O_5$ -coated $BaTiO-3$ Composite Particles by Metal Alkoxide Method,” J. Jpn. Soc. Powder and Powder Metallurgy, 42 1037 (1995).
L. Borum and O. C. Wilson Jr, “Surface Modification of Hydroxyapatite. Part. Silica,” Biomaterials, 24 3681-88 (2003).
E. Matijevi $\ae$ , “Uniform Inorganic Colloid Dispersions. Achievements and Challenges”, Langmuir, 10 8-16 (1994).
F. Caruso, “Nano Engineering of Particle Surfaces,” Adv. Mater., 13 11-22 (2001).
L. M. Liz-Marzan, M. Giersig, and P. Mulvaney, “Synthesis of Nanosized Gold-silica Core-shell Particles,” Langmuir, 12 4329-35 (1996).
M. Ohmori and E. Matijevic, “Preparation and Properties of Uniform Coated Inorganic Colloidal Particles : Silica on Iron,” J. Colloid Interface Sci., 160 288-92 (1993).
R. K. Iler, US Patent No. 2 885 366 1959.
N. Kawahashi and E. Matijevic, “Preparation of Hollow Spherical-particles of Yitrium Compounds”, J. Colloid Interface Sci., 143 103-10 (1991).
N. Kawahashi and E. Matijevic, “Preparation and Properties of Uniform Coated Colloidal Particles,” J. Colloid Interface Sci., 138 534-42 (1990).
M. Ohmori and E. Matijevic, “Preparation and Properties of Uniform Coated Colloidal Particles. VII. Silica on Hematite,” J. Colloid Interface Sci., 150 594-98 (1992).
H. Giesche and E. Matijevic, “Preparation, Characterization, and Sinterability of Well Defined Silica/yttria Powders,” J. Mater. Res., 9 436-50 (1994).
A. Hanprasopwattana, S. Srinivasan, A. G. Sault, and A. K. Datye, “Titania Coatings on Monodisperse Silica Spheres (Characterization Using 2-propanol Dehydration and TEM),” Langmuir, 12 3173-79 (1996).
X. C. Guo and P. Dong, “Multistep Coating of Thick Titania Layers on Monodisperse Silica Nanoparticles,” Langmuir, 15 5535-40 (1999).
Q. Liu, Z. Xu, J. A. Finch, and R. Egerton, “A Novel Twostep Silica Coating Process for Engineering Magnetic Nanocomposites,” Chem. Mater., 10 3936-40 (1998).
L. M. Liz-Marzan and A. P. Philipse, “Synthesis and Optical Properties of Gold-labeled Silica Particles,” J. Colloid Interface Sci., 176 459-66 (1995).
T. Ung, L. M. Liz-Marzan, and P. Mulvaney, “Controlled Method for Silica Coating of Silver Colloids : Influence of Coating on the Rate of Chemical Reactions,” Langmuir, 14 3740-48 (1998).
T. Ung, L. M. Liz-Marzan, and P. Mulvaney, “Redox Catalysis Using Ag@ $SiO_2$ Colloids,” J. Phys. Chem., B103 6770-73 (1999).
M. P. B. van Bruggen, “Preparation and Properties of Colloidal Core-shell Rods with Adjustable Aspect Ratios,” Langmuir, 14 2245-55 (1998).
S. R. Hall, S. A. Davis, and S. Mann, “Co-condensation of Organosilica Hybrid Shells on Nanoparticle Templates : a Direct Synthetic Route to Functionalized Core-shell Colloids,” Langmuir, 16 1454-56 (2000).
I. Pastoriza-Santos, D. S. Koktysh, A. A. Mamedov, M. Giersig, N. A. Kotov, and L. M. Liz-Marzan, “One-pot Synthesis of Ag-TiO2 Core-shell Nanoparticles and Their Layerby- layer Assembly,” Langmuir, 16 2731-35 (2000).
V. V. Hardikar and E. Matijevic, “Coating of Nanosize Silver Particles with Silica”, J. Colloid Interface Sci., 221 133-36 (2000).
R. Partch, Y. Xie, S. T. Oyama, and E. Matijevic, “Preparation and Properties of Uniform Coated Colloidal Particles. Viii. Titanium Nitride on Silica,” J. Mater. Res., 8 2014-18 (1993).
D. Walsh and S. Mann, “Fabrication of Hollow Porous Shells of Calcium Carbonate from Self-organizing Media,” Nature, 377 320-23 (1995).
A. M. Puertas, A. F. Barbero, and F. J. Nieves, “Induced asymmetries in the Heteroaggregation of Oppositely Charged Colloidal Particles”, J. Colloid and Interface Science, 265 36-43 (2003).
A. M. Islam, B. Z. Chowdhry, and M. J. Snowden, “Heteroaggregation in Colloidal Dispersions,” Adv. Colloid and Interface Science, 62 109-36 (1995).
A. M. Homola, M. R. Lorenz, C. J. Mastrangelo, and D. L. Tilbury, “Novel Magnetic Dispersions Using Silica Stabilized Particles,” IEEE Trans. Magn., 22 716-19 (1986).
A. M. Homola, M. R. Lorenz, H. Sussner, and S. L. Rice, “Ultrathin Particulate Magnetic Recording Media,” J. Appl. Phys., 61 3898-901 (1986).
A. M. Homola and S. L. Rice, US Patent [4] 280 918 (1981).
W. P. Hsu, R. Yu, and E. Matijevic, “Preparation and Characterization of. Uniform Particles of Pure and Coated Metallic Copper,” Powder Technol., 63 265-75 (1990).
F. Porta, W. P. Hsu, and E. Matijevic, “Preparation of Uniform Colloidal Metallic. Ruthenium and its Compounds,” Colloids Surf., 46 63-74 (1990).
S. W. Keller, S. A. Johnson, E. S. Brigham, E. H. Yonemoto, and T. E. Mallouk, “Photoinduced Charge Separation in Multilayer Thin Films Grown by Sequential Adsorption of Polyelectrolytes,” J. Am. Chem. Soc., 117 12879-80 (1995).
R. Hogg, T. W. Healy, and D. W. Fuerstenau, “Mutual Coagulation of Colloidal Dispersions,” Trans Faraday Soc., 62 1638-51 (1966).
K. Furusawa and O. D. Velev, “Electrokinetic Behavior in Synthetic Process of Composite Particles,” Colloids and Surfaces, A159 359-71 (1999).
R. Chen, A. Cui, X. Wang, Z. Gui, and L. Li, “Structure, Sintering Behavior and Dielectric Properties of Silica-coated $BaTiO_3$ ,” Mat. Lett., 54 314-17 (2002).
S. Senz, A. Graff, W. Blum, D. Hesse, and H.P. Abicht, “Orientation Relationship of Reactively Grown $Ba_6Ti_{17}O_{40}$ and $Ba_2TiSi_2O_8$ on $BaTiO_3$ (001) Determined by X-ray Diffractometry,” J. Am. Ceram. Soc., 81 1317-21 (1998).
S. V. Krishnan and I. Iwasaki, “Floc Formation in Quartz- Mg(OH)_2$ System,” Colloids and Surfaces, 15 89-100 (1985).
S. S. Dukhin, J. Yang, R. N. Dave, and R. Pfeffer, “Deactivated Sintering by Particle Coating : The Significance of Static and Dynamic Surface Phenomena,” Colloids Surf., A235 83-99 (2004).
J. Pan, H. Le, S.Kucherenko, and J. A. Yeomans, “A Model for the Sintering of Spherical Particles of Different Sizes,” Acta Mater., 46 4671-90 (1998).
K. Darcovich, L. Bera, and K. Shinagawa, “Particle Size Distribution Effects in an FEM Model of Sintering Porous Ceramics,” Mat. Sci. Eng., A341 247-55 (2003).
D. Hennings and G. Rosenstein, “Temperature-stable Based Chemically Inhomogeneous $BaTiO_3$ ,” J. Am. Ceram. Soc., 67 249-54 (1984).
W. D. Kingery, H. K. Bowen, and D. R. Uhlmann, Introduction to Ceramics, 2nd ed., Wiley, New York, 1976.
D. A. Payne, L. E. Cross, in: Fulrath, R. M., and Park, J. A., “Microstructure-Property Relations for Dielectric Ceramics: Ceramic Microstructure,” Westview Press, Boulder, 1977.
*원문 PDF 파일 및 링크정보가 존재하지 않을 경우 KISTI DDS 시스템에서 제공하는 원문복사서비스를 사용할 수 있습니다.
저자가 APC(Article Processing Charge)를 지불한 논문에 한하여 자유로운 이용이 가능한, hybrid 저널에 출판된 논문
※ AI-Helper는 부적절한 답변을 할 수 있습니다.