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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25043完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 韋文誠(Wen-Cheng J. Wei) | |
| dc.contributor.author | Chia Chia Kan | en |
| dc.contributor.author | 甘家嘉 | zh_TW |
| dc.date.accessioned | 2021-06-08T06:00:55Z | - |
| dc.date.copyright | 2007-08-01 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-27 | |
| dc.identifier.citation | Reference
1. P. Garcia-Perez, C. Pagnoux, F. Rossignol, and J. F. Baumard, “Heterocoagulation of SiO2 nanoparticles and Al2O3 submicronparticles; influence of the background electrolyte,” Colloids and Surfaces A: Physicochem. Eng. Aspects, 281, 58-66 (2006) 2. E. Geuzens, G. Vanhoyland, J. D’Haen, S. Mullens, J. Luyten, M. K. Van Bael, H. Van den Rul, and J. Mullens, “Synthesis of zirconia-alumina and alumina-zirconia core-shell particles via a heterocoagulation mechanism,” J. Euro. Ceram. Soc., 26, 3133-8 (2006) 3. G. Wang, and P. S. Nicholson, “Heterocoagulation in ionically stabilization mixed-oxide colloidal dispersions in ethanol,” J. Am. Ceram. Soc., 84 [6] 1250-6 (2001) 4. J. S. Park, and Y. H. Han,“Effect of MgO coating on microstructure and dielectric properties of BaTiO3”J. Euro. Ceram. Soc., 27, 1077-82 (2007) 5. J. Šubrt, V. Štengl, S. Bakardjieva, and L. Szatmary, “Synthesis of spherical metal oxide particles using homogeneous precipitation of aqueous solutions of metal sulfates with urea,” Powder Technology, 169, 33-40 (2006) 6. H. Shiho, and N. Kawahashi, “Iron compounds as coating on polystyrene latex and as hollow spheres,” J. Colloid. Inter. Sc., 226, 91-7 (2000) 7. T. Hatano, T. Yamaguchi, W. Sakamoto, T. Yogo, K. Kikuta, H. Yoshida, N. Tanaka, and S. Hirano,“Synthesis and characterization of BaTiO3 coated Ni particles,” J. Euro. Ceram. Soc., 24, 507-10 (2004) 8. Y. Kobayashi, H. Katalami, E. Mine, D. Nagao, M. Konno, and L. M. Liz-Marzán, “silica coating of silver nanoparticles using a modified stöber method,” J. Colloid. Inter. Sci., 283, 392-6 (2005) 9. W. C. J. Wei, B. Y. Yu, J. F. Li, and C. S. Chen, ”Controlled nano-oxide layer coating on fine particles with multiple optical-electrical functions,” Key Engineering Materials, 313, 37-42 (2006) 10. F. Caruso, R. A. Caruso, and H. Möhwald, “Nanoengineering of inorganic and hybrid hollow spheres by colloidal templating,”Science, 282, 1111-4 (1998) 11. F. Caruso, R. A. Caruso, and H. Möhwald, “Production of hollow microspheres from nanostructures composite particles,” Chem. Mater., 11, 3309-14 (1999) 12. R. Z. Chen, A. Cui, X. Wang, and L. Li, “Barium titanate coated with magnesium titanate via fused salt method and its dielectric property,” Mat. Sci. Eng., 302-5 (2003) 13. Y. Ito, S. Shimada, and M. Inagaki, “Molten-salt synthesis of Ba1-xPbxO3/BaTiO3 composites with controlled compositions,” Sol. Stat. Ion. 101-3 (1997) 14. R. S. Strawn, “Investigation and application of PLZT ferroelectric ceramics,” PhD thesis, Arizona state University, (1976) 15. Y. C. Chen, L. Wu, Y. P. Chou and Y. T. Tsai, “Curve-fitting of direct-current field dependence of dielectric constant and loss factor of Al2O3-doped barium strontium titanate”, Materials science and engineering B76 95-100 (2000) 16. J. P. Remeika and W. M. Jackson, “A Method for Growing Barium Titanate Single Crystals,” J. Am. Chem. Soc., 76 (1954) 17. R. C. DeVries and J. E. Burke, “Microstructure of barium titanate ceramics,” J. Am. Ceram.Soc., 40 [6] 200-206 (1957) 18. J. A. Hooton and W. J. Merz, “Etch patterns and ferroelectric domains in BaTiO3 single crystals,” Phys. Rev., 98 409-13 (1955) 19. R. Gever, H. Blank, and S. Amelinckx, “Extension of the Howie-Whelan equations for electron diffraction to non-centro symmetrical crystals, “Phys. Status. Solidi, 13, 449-65 (1966) 20. G. L. Nord, “Imaging transformation-induced microstructure,” Rev. Mineral., 27, 455-508 (1992) 21. D. E. Rase and R. Roy, ”Phase equlibria in the system BaO-TiO2,” J. Am. Ceram. Soc., 38 [3] 102-13 (1995) 22. K. W. Kirby and B. A. Wechsler, “Phase relations in the barium-titanate oxide system,” J. Am. Ceram. Soc., 74 [8] 841-47 (1991) 23. E. Tillmanns and W. H. Baur, “The crystal structure of hexabarium 17-titanate,” Acta Crystal., B26 [11] 1645-55 (1970) 24. D. Hennings, B. S. Schreinemaher, “Temperature stable dielectric materials in the system BaTiO3-Nb2O5-Co3O4,” J. Euro. Ceram. Soc., 14 [2] 463 (1994) 25. V. Krasevec, M. Drofenik, and D. Kolar, “Topotaxy between BaTiO3 and Ba6Ti17O40,” J. Am. Ceram. Soc., 70 [8] C-193-5 (1987) 26. V. Krasevec, M. Drofenik, and D. Kolar, “Genesis of the (111) twin in barium titanate,” J. Am. Ceram. Soc., 73 [4] 856-60 (1990) 27. X. Xu and G. E. Hilmas, “Effects of Ba6Ti17O40 on the dielectric properties of Nb-doped BaTiO3 ceramics,” J. Am. Ceram. Soc., 89 [8] 2496-501 (2006) 28. B. Jaffe, W. R. Cook, and H. Jaffe, “Piezoelectric Ceramics,” London and New York: Academic Press, (1971) 29. W. D. Kingery, H. K. Bowen, and D. R. Uhlmann, Chapter 18, Dielectric properties, Introduction to Ceramics, J. Wiley, NY 913-74 (1976) 30. A. J. Moulson and J. M. Herbert, “Electricceramics,” England: Wiley, 2003 31. C. S. Chen and C. C. Chou, I. N. Lin, “microstructure of X7R type base-metal-electroded BT capacitor materials prepared by duplex-structured process,” J. Euro. Ceram. Soc., 25, 2743-47 (2005) 32. P. Blanchart, J. F. Baumard, and P. Abelard, “Effects of yttrium doping on the grain and grain-boundary resistivities of BaTiO3 for positives temperature coefficient thermistors,” J. Am. Ceram. Soc., 75 [5] 1068-72 (1992) 33. B. A. Rotenberg, Y. L. Danilyuk, E. I. Gindin, and V. G. Prokhvatilov, “Electrical and radiospectroscopic investigations of barium titanate with admixtures of oxides of trivalent elements,” Sov. Phy.-Solid. State, 7 [10] 2465-68 (1966) 34. L. A. Xue, “Additives and the control of grain growth in barium titanate ceramics,” PhD thesis, University of Leeds. 35. T. B. Wu and J. N. Lin, “Transition of compensating defect mode in niobium-doped barium titanate,” J. Am. Ceram. Soc., 77 [3] 759-64 (1994) 36. C. J. Peng, and H. Y. Lu, “Compensation effect in semiconducting BaTiO3,” J. Am. Ceram. Soc., 71 [1] C44-46 37. H. M. Chan, M. P. Harmer, and D. M. Smyth, “Compensating defects in highly donor-doped BaTiO3,” J. Am. Ceram. Soc., 69 [6] 507-10 (1986) 38. J. K. Lee and K. S. Hong, “Revisit to the origin of grain growth anomaly in yttria-doped barium titanate,” J. Am. Ceram. Soc., 84 [8] 1745-9 (2001) 39. E. Brzozwski, M. S. Castro, C. R. Foschini, and B. Stojanovic, “Sceondary phase in Nb-doped BaTiO3 ceramics,” Ceram. Int., 28, 773-7 (2002) 40. K. Kowalski, M. Ijjaali, T. Bak, B. Dupre, J. Nowotny, M. Rekas, and C. C. Sorell, “Electrical properties of Nb-doped BaTiO3,” J. Phys. Chem. Sol., 62, 543-51 (2001) 41.林明宏,“非劑量式組成鈦酸鋇陶瓷之無壓力燒結暨其為結構發展,” 國立中山大學材料科學研究所博士論文 (1998) 42.陳致丞, 簡廷安, 方冠榮,“錳、鎂摻雜對Ba1.002(Ti0.82Zr0.18)O3+δ的結構及介電性質之影響,”中華民國陶瓷年會論文, 95/5 44. H. Kishi, Y. Okino, M. Honda, Y. Iguchi, M. Imaeda, Y. Takahashi, H. Ohsato, and T. Okuda, “the effect of MgO and rare-earth oxide on formation behavior of core-shell structure in BaTiO3,” Jpn. J. Appl. Phys., 36, 5947-54 (1997) 45.許雅琪, 林城興, 王錫福, 王玉瑞, 徐永富, 吳玉娟,“六方晶鈦酸鋇Ba(Ti1-xFex)O3陶瓷之緻密化行為、微結構極微波介電性質,”中華民國陶瓷年會論文, 95/5 46. J. S. Kim, J-S. L. Kong, “Formation of core-shell structure in the BaTiO3-SrTiO3 system,” J. Am. Ceram. Soc., 82 [4] 1085-88 (1999) 47. H. Y. Lu, “Core-shell structure in ZrO2-modified BT ceramic,” J. Am Ceram. Soc., 73 [12] 3562-8 (1990) 48. C. A. Randall, S. F. Wang, D. Laubscher, J. P. Dougherty, and W. Huebner, “Structure property relationships in core-shell BaTiO3-LiF ceramics,” J. Mater. Res., 8 [4] 871-9 (1993) 49. B. D. Stojanovic, C. R. Foschini, M. A. Zaghete, F. O. S. Veira, K. A. Peron, M. Cilense, and J. A. Varela, “Size effect on structure and dielectric properties of Nb-doped barium titanate,” J. Mater. Proc. Tech., 143-144, 802-6 (2003) 50. H. Chazono and M. Fujimoto, “Sintering characterization and formation mechanism of “core-shell” structure in BaTiO3-Nb2O5-Co3O5 ternary system,” Jpn. J. Appl. Phys., 34, 5354-59 (1995) 51. H. Chazono and H. Kishi, “Sintering characterization in the BaTiO3-Nb2O5-Co3O4 ternary system: Ⅱ, stability of so-called “core-shell” structure,” J. Am. Ceram. Soc., 83 [11] 101-06 (2000) 52. T. R. Armstrong and R. C. Buchanan, “Influence of core-shell grains on the internal stress state and permittivity response of zirconia-modified barium titanate,” J. Am. Ceram. Soc., 73 [5] 1268-73 (1990) 53. Q. Feng and C. J. McConville, “Weak-beam dark-field microscopy of complex stress states in X7R-type BaTiO3 dielectric core-shell structures,” J. Am. Ceram. Soc., 87 [10] 1945-51 (2004) 54. H. Hsiang and F. S. Yen, “Effect of crystallite size on the ferroelectric domain growth of ultrafine BaTiO3 powders,” J. Am. Ceram. Soc., 79 [4] 1053-60 (1996) 55. S. Wada, H. Yasuno, T. Hoshina, S. M. Nam, H. Kakemoto, and T. Tsurumi, “Preparation of nm-sized barium titanate fine particles and their powder dielectric properties,” Jpn. J. Appl. Phys., 42, 6188-95 (2003) 56. T. Tunkasiri and G. Rujijanagul, “Dielectric strength of fine grained barium titanate ceramics.” J. Mater. Sci. Lett., 15, 1767-9 (1996) 57. S. F. Wang and G. O. Dayton, “dielectric properties of fine-grained barium titanate based X7R materials,” J. Am. Ceram. Soc., 82 [10] 2677-82 (1999) 58. G. Arlt, D. Hennings, and G. de With, “Dielectric properties of fine-grained barium titanate ceramics,” J. Appl. Phys., 58, 1619-25 (1985) 59. W. R. Buessem, L. E. Cross, and A. K. Goswami, “Phenomenological theory of high permittivity in fine-grained barium titanate,” J. Am. Ceram. Soc., 49 [1] 33-6 (1966) 60. Y. Park, H. G. Kim, “Dielectric temperature characteristics of cerium-modified barium titanate based ceramics with core-shell grain structure,” J. Am. Ceram. Soc., 80 [1] 106-12 (1997) 61. A. J. Bell, A. J. Moulson, and L. E. Cross, “The effect of grain size on the permittivity of BaTiO3,” Ferroelectrics, 54, 147-50 (1984) 62. Y. H. Han, J. B. Appleby, and D. M. Smyth, “Calcium as acceptor impurity in BaTiO3,” J. Am Ceram. Soc., 70 [2] 96-100 (1987) 63. T. Tsurumi, T. Lchikawa, T. Harigai, H. Kakemoto, “Dielectric and optical properties of BaTiO3/SrTiO3 and BaTiO3/BaZrO3 superlattices,” J. Appl. Phys. 64. J. H. Hwang and Y. H. Han, “Electrical properties of cerium-doped BaTiO3,” J. Am. Ceram. Soc., 84[8] 1750-54 (2001) 65. N. Kurata and M. Kuwabara, “Semiconducting-insulating transition for highly donor-doped barium titanate ceramics,” J. Am. Ceram. Soc., 76 [7] 1605-8 (1993) 66. J. Itoh, D. Park, N. Ohashi, I. Sakaguchi, I. Yashima, H. Haneda and J. Tanka, “Oxygen diffusion and defect chemistry in rare-earth-doped BaTiO3,” J. Ceram. Soc. Jpn., 110 [5] 495-500 (2002) 67. P. Hansen, D. Hennings, and H. Schreinemacher, “High-K dielectric ceramics from donor/acceptor-codoped BCTZ,” J. Am. Ceram. Soc., 81 [5] 1369-73 (1998) 68. H. T. Langhammer, T. Mülle, K. H. Felgne, and H. P. Abicht, “Crystal Structure and Related Properties of Manganese-Doped Barium Titanate Ceramics,” J. Am. Ceram. Soc., 83 [3] 605-11 (2000) 69. R. Zhang, J. F. Li, and D. Viehland, “Effect of aliovalent substituents on the ferroelectric properties of modified barium titanate ceramics: Relaxor ferroelectric behavior,” J. Am. Ceram. Soc., 87 [5] 864-70 (2004) 70. Y. H. Lee and S. G. Oh, “Preparation and characterization of BaTiO2 particles coated with yttrium compound,” Ceram. Proc. Res., 5 [2] 187-90 (2004) 71. H. Y. Lu and M. H. Lin, “Charge compensation mechanism in yttria-doped barium titanate,” Ceram. Inter., 31, 989-97 (2005) 72. J. Daniels, K. H. Hardtl, D. Hennings, and R. Wernicke, “Defect chemistry and electrical conductivity of doped barium titanate ceramics, Part I.Electrical conductivity at high temperature of donor-doped barium titanate ceramics,” Philips Res. Rep., 31 487-504 (1976) 73. G. V. Lewis and C. R. A. Catlow, “Defect studies of doped and undoped barium titanate using computer simulation techniques,” J. Phys. Chem. Solids., 47 [1] 89-97 (1986) 74. W. R. Buessem and M. Kahn, “Effects of grain growth on the distribution of Nb in BaTiO3 ceramics,” J. Am. Ceram. Soc., 59 [9] 458-61 (1971) 75. G. H. Jonker and E. E. Havinga, “The influence of foreign ions on the crystal lattice of barium titanate,” Mater. Res. Bull., 17 [3] 345-50 (1982) 76. N. H. Chan and D. M. Smyth, “Defect chemistry of donor-doped BaTiO3,” J. Am. Ceram. Soc., 67 [4] 285-88 (1984) 77. J. Nowotny and M. Rekas, “Defect structure, electrical properties and transport in Barium Titanate. VII. Chemical diffusion in Nb-doped BaTiO3,” Ceramics International, 20 [4] 265-75 (1994) 78. I. Burn, “Temperature-stable barium titanate ceramics containing niobium pentoxide,” Electrocomponent Sci. Technol., 2 241-47 (1976) 80. J. F. Baumard and E. Tani, “Thermoelectric power in reduced pure and Nb-doped TiO2 rutile at high temperature,” J. Chem. Phys., 67 [3] 857 (1977) 81. M. M. Lencka, R. E. Riman, “Thermodynamic modeling of hydrothermal synthesis of ceramic powders,” Chem. Mater., 5 61-70 (1993) 82. M. C. Blanco-Lopez, B. Rand, F. L. Riley, “The properties of aqueous phase suspension of barium titantate,” J. Eur. Ceram. Soc., 17 281-87 (1997) 83. C. W. Chiang, J. H. Jean, “Effects of barium titanate on dispersing aqueous barium titanate suspensions,” Mater. Chem. Phys., 80 647-655 (2003) 84. U. Paik, V. A. Hackley, “Influence of solid concentration on the isoelectric point of aqueous barium titanate,” J. Am. Ceram. Soc., 83 [10] 2381-84 (2000) 85. M. C. Blanco-Lopez, B. Rand, F. L. Riley, “The isoelectric point of BaTiO3,” J. Eur. Ceram. Soc., 20 107-118 (2000) 86. S. H. Yoon and H. Kim, “Effect of donor (Nb) concentration on the bulk electric resistivity of Nb-doped barium titanate,” J. Appl. Phys., 92 [2] 1039-47 (2002) 87. A. Muan, Am. J. Sci.,257, 300 (1959) 88. P. Gerthsen, K. H. Haerdtl, and N. A. Schmidt, “Correlation of mechanical and electrical losses in ferroelectric ceramics,” J. Appl. Phys., 51 [2] 1131-4 (1980) 89. S. H. Yoon, J. H. Lee, and D. Y. Kim, “Effect of the liquid phase characteristic on the microstructures and dielectric properties of donor- (Nb) and acceptor- (Mg) doped barium titanate,” J. Am. Ceram. Soc., 86[1] 88-92 (2003) 90. D. E. Mccauley, M. S. H. Chu, and M. H. Megherhi, “PO2 dependence of the diffuse-phase transition in base metal capacitor dielectrics,” J. Am. Ceram. Soc., 89 [1] 193-201 (2006) 91. K. M. Cruickshank, X. Jing, G. Wood, E. E. Lachowski, A. R. West, “Barium Neodymium Titanate Electroceramics: Phase Equilibria Studies of Ba6-3xNd8+2xTi18O54 Solid Solution,” J. Am. Ceram. Soc., 79 [6] 1605-10 (1996) 92. R. Z. Chen, A. Cui, X. H. Wang, Z. Gui, and L. T. Li, “Structure, sintering behavior and dielectric properties of silica-coated BaTi3,” Mater. Lett., 54, 314-17 (2002) 93. S. Pathumarak, M. A. Khafaji, and W. E. Lee, “Microstructure development on firing Nb2O5 and Bi2O3 doped BaTiO3,” Br. Ceram. Trans., 93 [3] 114-8 (1994) 94. D. Hennings and G. Rosenstein, “Temperature-stable dielectric based on chemically inhomogeneous BaTiO3,” J. Am. Ceram. Soc., 67 [4] 249-54 (1984) 95. U. Straube, H. T. Langhammer, H. P. Abicht, and H. Beige, “Elastic behavior of multilayer piezoceramic BaTi1-xSnxO3 in the lower MHz region,” J. Euro. Ceram. Soc., 19, 1171-4 (1999) 96. D. Hennings and A. Schnell, “Diffuse ferroelectric phase transitions in Ba(Ti1-yZry)O3 ceramics,” J. Am. Ceram. Soc., 65 [11] 539-44 (1982) 97. M. Kuwabara, “Effect of microstructure on PTCR effect in semiconducting barium titanate ceramcs,” J. Am. Ceram. Soc., 64 [11] 639-644 (1981) | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/25043 | - |
| dc.description.abstract | 本研究揭示一種鈮化物在鹼性環境下於鈦酸鋇粉體表面產生均勻奈米層狀鍍層的方法。本研究利用氯化鈮水溶液在鹼性下會產生回溶現象，並將分散良好之鈦酸鋇鹼性漿料加入作為基底粒子，經由酸液滴定及持續的混合攪拌後，可增加水溶液中鈮離子的反應量，並在鈦酸鋇粒子表面形成厚度小於50奈米的層狀鍍膜。此外，經由感應耦合電漿發射光譜分析儀(ICP-OES)分析發現，鋇離子的溶出問題在整個鍍膜過程可完全被抑制。利用ICP-OES分析鈮離子在不同pH下之殘留結果發現，鈮離子在無添加鈦酸鋇粒子存在時，當pH<11時溶解度明顯下降，而析出物經X光繞射儀(XRD)分析為鈮酸物(niobium acid, HNbO3)。經奈米鍍膜後之鈦酸鋇粉體則添加二氧化矽(SiO2)和三氧化二錳(Mn2O3)於粉體中進行燒結，其分別作為助燒結劑以及在還原氣氛燒結中之電性補償添加劑。燒結方面，主要探討不同鈮添加量對燒結行為的影響，以及生成之二次相和殼-核結構的觀察。這部份利用熱機械性質分析儀 (TMA)，XRD，掃描式電子顯微鏡(SEM-EDX)和穿透式電子顯微鏡附設能量分散光譜儀(TEM-EDX)進行分析和觀察。最後，比較本研究所製備之樣品及傳統固態混合法所得之樣品的介電性表現，包括﹕介電值(K)，絕緣電組(IR)，介電損失(tan | zh_TW |
| dc.description.abstract | Different from conventional solid-state mixing, this study discovered a method of homogeneous coating process for niobium (Nb) on BT powders. The nano-coating process was implemented in the alkaline condition of using niobium chloride (NbCl5) being the precursor solution. The precipitation behavior of Nb without and with the presence of BT particles, as a function of pH was quantitatively determined by inductance coupled plasma (ICP-OES). The amphibious solubility property of Nb5+ in aqueous solution was found and showed a poor solubility about pH < 11 without the addition of BT particles. The crystalline phase of the precipitation of Nb is determined to be niobium acid (HNbO3) by X-ray diffractometry (XRD). By titrating the mixture of Nb-solution and BT suspension from pH = 11.5 to pH = 11.2, a homogeneous layer coating with a thickness less than 50 nm can be obtained. Besides, the leaching of Ba2+ could be completely suppressed in the coating process.
In addition, the Nb-BT powders were prepared from nano-coating and conventional solid-state mixing for comparison. SiO2 and Mn2O3 powders were added as sintering aid and charge compensator to the Nb-BT powders, respectively. The sintering treatment was carried out at 1225oC for 1 h under reducing atmosphere (1% H2-99% N2) and then annealing at 1000oC for 1h in pure N2 through water at RT. The microstructure features of the sintered ceramics were investigated by SEM-EDX (scanning electron microscope equipped with energy dispersive spectroscopy) and XRD. The formation of “core-shell” structure with Nb concentration gradient was observed by transmission electron microscope (TEM-EDX) and dielectric properties were measured by AC impedance analyzer. The dielectric constant (K) of nano-coating and solid-state mixing specimens show average values ~2000. Apart from solid-state mixing, nano-coating specimens have more stable TCC (temperature coefficient of capacitance) and satisfy the requirement of X7R (EIA) which confirms the more uniform distribution of Nb content in the nano-coating process. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-08T06:00:55Z (GMT). No. of bitstreams: 1 ntu-96-R94527005-1.pdf: 7552659 bytes, checksum: 75381f0256a2b47157fc5fb3301b7496 (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | 摘要 I
Abstract II Content IV List of Figures VI List of Tables IX Chapter 1 Introduction 1 Chapter 2 Literature Review 4 2-1 Nano-coating Processes on Particulates 4 2-2 Introduction to BaTiO3 10 2-2-1 Crystal Structure of BaTiO3 10 2-2-2 Origin of Ferroelectricity 10 2-2-3 Observations of Domains and Domain Boundaries 12 2-2-4 Equilibrium Phase Diagram of BaO-TiO2 System 14 2-3 Effect of Dopants on Dielectric Materials 23 2-3-1 Effects on Microstructure 23 2-3-2 Formation of Core-shell Structure 26 2-3-3 Effects on Dielectric Properties 30 2-4 Defect Chemistry of BaTiO3 39 2-4-1 Intrinsic Defects 39 2-4-2 Extrinsic Defects -Charge Mechanisms in Nb-doped BT 40 Chapter 3 Experimental Procedure 47 3-1 Synthesis of Nb-coating BT Powders 47 3-1-1 Materials 47 3-1-2 Sample Preparation 47 3-1-3 Coating Process 48 3-1-4 Precipitation Behavior of NbCl5 Solution as pH Value 49 3-1-5 Crystalline Phase Analysis of Nb-Precipitate 49 3-1-6 Microstructural observation 50 3-2 Preparation of Bulky Samples 50 3-2-1 Sample Preparation 50 3-2-2 TMA (Thermal mechanical Analysis) 51 3-2-3 Bulk Density Measurement 52 3-2-4 Microstructural Observation 52 3-3 Dielectric Properties 53 Chapter 4 Results and Discussion 57 4-1 Dispersion of BaTiO3 Suspension 57 4-2 Coating process 58 4-2-1 Precipitation behavior of Nb 58 4-2-2 Coating Behavior of Nb with BT Particles 60 4-2-3 Microstructure of Coating 61 4-2-4 Dissolution of BT particles 62 4-3 Sintering behavior of Nb-doped BT Powders 72 4-3-1 Bulk density 72 4-3-2 Microstructure observation 72 4-3-3 XRD results 74 4-3-4 TMA results 77 4-3-5 Microstructure Observation by TEM 82 4-4 Dielectric Properties 98 Chapter 5 Conclusions 105 Reference 108 | |
| dc.language.iso | en | |
| dc.subject | 鈦酸鋇 | zh_TW |
| dc.subject | 電性 | zh_TW |
| dc.subject | 殼-核結構 | zh_TW |
| dc.subject | 鈮 | zh_TW |
| dc.subject | 奈米鍍膜 | zh_TW |
| dc.subject | BaTiO3 | en |
| dc.subject | Nb | en |
| dc.subject | dielectric properties | en |
| dc.subject | core-shell | en |
| dc.subject | coating | en |
| dc.title | 奈米鈮鍍膜之合成與摻雜鈮之鈦酸鋇性質分析 | zh_TW |
| dc.title | Synthesis of Nb nano-coating and characterization
of coated BaTiO3 | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 許貫中,李文熙 | |
| dc.subject.keyword | 鈮,鈦酸鋇,奈米鍍膜,殼-核結構,電性, | zh_TW |
| dc.subject.keyword | Nb,BaTiO3,coating,core-shell,dielectric properties, | en |
| dc.relation.page | 114 | |
| dc.rights.note | 未授權 | |
| dc.date.accepted | 2007-07-30 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 材料科學與工程學研究所 | zh_TW |
| 顯示於系所單位： | 材料科學與工程學系 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-96-1.pdf 未授權公開取用 | 7.38 MB | Adobe PDF |
系統中的文件，除了特別指名其著作權條款之外，均受到著作權保護，並且保留所有的權利。