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Online since: March 2017
Authors: Ying Chieh Lee, Tai Kuang Lee, Jyun Hung Chen
The Effects of Ba(Zr0.05Ti0.95)O3 Addition on Piezoelectric Properties
and Microstructures of (Na0.5Bi0.5)0.94Ba0.06TiO3 Ceramics
Tai-Kuang Lee1, a, Jyun-Hung Chen2,b and Ying-Chieh Lee2,c *
1 Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan, R.O.C
2 Department of Materials Engineering National Pingtung University of Technology and Science, Taiwan, R.O.C
a n2896107@mail.ncku.edu.tw, b m10345015@mail.npust.edu.tw, *cYCLee@mail.npust.edu.tw
Keywords: Piezoelectricity, Microstructure, Dielectric properties, Ferroelectricity
Abstract.
Therefore, it is necessary to develop environment-friendly lead-free piezoelectric ceramics to replace PZT based ceramics, which has become one of the main trends in present development of piezoelectric materials.[3] Bismuth sodium titanate (Bi0.5Na0.5)TiO3 (NBT) is quite possibly an excellent potential replacement for lead-containing piezoelectric ceramics.
Reagent grade powders (Alfa Aesar) of Na2CO3 (99.997%), Bi2O3 (99.975%) BaCO3 (99.8%) and TiO2 (99.99%) were mixed in stoichiometric amounts to produce starting materials for preparing the ceramics.
[14] Liu Weihua, Xu Qing, Chen Wen, Chen Min, Kim Bokhee, Structure and Electrical Properties of (Na0.5Bi0.5)0.94Ba0.06TiO3 Ceramic with 0.5 wt% of MnO, Journal of Wuhan University of Technology-Mater.
Bo¨hm, Structural and electric characteristics of (Na0.5Bi0.5)0.50Ba0.50TiO3 and (Na0.5Bi0.5)0.20Ba0.80TiO3 ceramics, Materials Sci. & Eng., B97 (2003) 154-159
Therefore, it is necessary to develop environment-friendly lead-free piezoelectric ceramics to replace PZT based ceramics, which has become one of the main trends in present development of piezoelectric materials.[3] Bismuth sodium titanate (Bi0.5Na0.5)TiO3 (NBT) is quite possibly an excellent potential replacement for lead-containing piezoelectric ceramics.
Reagent grade powders (Alfa Aesar) of Na2CO3 (99.997%), Bi2O3 (99.975%) BaCO3 (99.8%) and TiO2 (99.99%) were mixed in stoichiometric amounts to produce starting materials for preparing the ceramics.
[14] Liu Weihua, Xu Qing, Chen Wen, Chen Min, Kim Bokhee, Structure and Electrical Properties of (Na0.5Bi0.5)0.94Ba0.06TiO3 Ceramic with 0.5 wt% of MnO, Journal of Wuhan University of Technology-Mater.
Bo¨hm, Structural and electric characteristics of (Na0.5Bi0.5)0.50Ba0.50TiO3 and (Na0.5Bi0.5)0.20Ba0.80TiO3 ceramics, Materials Sci. & Eng., B97 (2003) 154-159
Online since: May 2009
Authors: Yong Tang, Wei Xia, Ya Jun Liu, Jia Bin Huang, Meng Yang Qin
Major advantages of HSM are reported as: high material removal rates [2], low cutting forces,
dissipation of heat with chip removal resulting in decrease in workpiece distortion [3] and increases
of part precision and surface finish down to Ra 0.1μm [4].
The common disadvantages of highspeed machining are claimed to be: excessive tool wear, need for special and expensive machine tools [5], balancing the tool holder, precision tool-holder tapers [6] and costly cutting tool materials and coatings.
Eq. (1), (2) show that if workpiece material, sectional area of cutting lay Ac and tool rake angle γ0 are known, shear force Fs and chip inertia force Fm are determined by shear angle φ and friction angle β, which are effected by cutting speeds.
Acknowledgements This research is sponsored by the GuangDong Natural Science Foundation (Grant No. 31322).
Altan: Journal of Materials Processing Technology,Vol.98 (2000), pp.104-115
The common disadvantages of highspeed machining are claimed to be: excessive tool wear, need for special and expensive machine tools [5], balancing the tool holder, precision tool-holder tapers [6] and costly cutting tool materials and coatings.
Eq. (1), (2) show that if workpiece material, sectional area of cutting lay Ac and tool rake angle γ0 are known, shear force Fs and chip inertia force Fm are determined by shear angle φ and friction angle β, which are effected by cutting speeds.
Acknowledgements This research is sponsored by the GuangDong Natural Science Foundation (Grant No. 31322).
Altan: Journal of Materials Processing Technology,Vol.98 (2000), pp.104-115
Online since: August 2005
Authors: D.J. Stephenson
Stephenson
School of Industrial & Manufacturing Science, Cranfield University, Cranfield, UK
Keywords: Grinding fluids, cooling, lubrication, thermal modelling.
One means of controlling the heat flux is by optimising the grinding parameters which generally results in the use of conservative material removal rates.
It is expected that the heat flux to the chips is high enough to raise the chip material close to the melting point of the workpiece material.
By increasing the depth of cut and feed rate (or specific material removal rate), the C-factor and Fr ratio can be reduced.
I.Mech.E Part B, Journal of Engineering Manufacture, Vol. 217, (2003), pp. 397-407
One means of controlling the heat flux is by optimising the grinding parameters which generally results in the use of conservative material removal rates.
It is expected that the heat flux to the chips is high enough to raise the chip material close to the melting point of the workpiece material.
By increasing the depth of cut and feed rate (or specific material removal rate), the C-factor and Fr ratio can be reduced.
I.Mech.E Part B, Journal of Engineering Manufacture, Vol. 217, (2003), pp. 397-407
Online since: October 2010
Authors: Zhi Gang Ji, Gai Fang Niu
China's great development of LTMI has expanded its scale of import &
export as well as of use of foreign investment, brought enormous demands for labor force and raw
materials, driven domestic employment, and promoted sustainable economic growth.
Index Determination and Data Collection Horizontal evaluation covers 25 industries (as shown in Table 1), and the reference system based on indexes in China Statistical Yearbook on Science and Technology 2008 is used to guarantee that inter-industry values are comparable.
Name And Code Of Chinese Ltmi Code Name of Industry Code Name of Industry H1 Farm products and by-food processing H14 Raw chemical materials and chemical products H2 Food production H15 Chemical fiber H3 Beverage production H16 Rubber products H4 Tobacco products H17 Plastic products H5 Textile industry H18 Nonmetal mineral products H6 Garments, shoes and hats production H19 Smelting and pressing of ferrous metals H7 Leather, furs, feather (down) and related products H20 Smelting and pressing of nonferrous metals H8 Timber processing, bamboo, cane, palm, straw products H21 Metal products H9 Furniture manufacturing H22 Ordinary equipment H10 Papermaking and paper products H23 Special equipment H11 Printing and record medium reproduction H24 Transportation equipment H12 Cultural educational and sports goods H25 Handicraft and other production H13 Petroleum, coking and nuclear fuel
This indicates that China should strengthen its input of innovation resources in the above three industries to realize more output; As to the following 14 industries, namely, H2: Food production; H3: Beverage production; H5: Textile industry; H6: Garments, shoes and hats production; H10: Papermaking and paper products; H13: Petroleum, coking and nuclear fuel processing; H14: Raw chemical materials and chemical products; H15: Chemical fiber; H17: Plastic products; H18: Nonmetal mineral products; H19: Smelting and pressing of ferrous metals; H20: Smelting and pressing of nonferrous metals; H21: Metal products; and H23: Special equipment, they fail to achieve optimized resource allocation and have decreasing returns to scale, which shows that they are facing the problem of innovation resource waste, and they only obtain comparatively small increase in output by enlarging input scale.
Knowledge,innovation and firm performance in high- and low-technology regimes [J].Journal of Business Venturing,2006,21(15):687-703
Index Determination and Data Collection Horizontal evaluation covers 25 industries (as shown in Table 1), and the reference system based on indexes in China Statistical Yearbook on Science and Technology 2008 is used to guarantee that inter-industry values are comparable.
Name And Code Of Chinese Ltmi Code Name of Industry Code Name of Industry H1 Farm products and by-food processing H14 Raw chemical materials and chemical products H2 Food production H15 Chemical fiber H3 Beverage production H16 Rubber products H4 Tobacco products H17 Plastic products H5 Textile industry H18 Nonmetal mineral products H6 Garments, shoes and hats production H19 Smelting and pressing of ferrous metals H7 Leather, furs, feather (down) and related products H20 Smelting and pressing of nonferrous metals H8 Timber processing, bamboo, cane, palm, straw products H21 Metal products H9 Furniture manufacturing H22 Ordinary equipment H10 Papermaking and paper products H23 Special equipment H11 Printing and record medium reproduction H24 Transportation equipment H12 Cultural educational and sports goods H25 Handicraft and other production H13 Petroleum, coking and nuclear fuel
This indicates that China should strengthen its input of innovation resources in the above three industries to realize more output; As to the following 14 industries, namely, H2: Food production; H3: Beverage production; H5: Textile industry; H6: Garments, shoes and hats production; H10: Papermaking and paper products; H13: Petroleum, coking and nuclear fuel processing; H14: Raw chemical materials and chemical products; H15: Chemical fiber; H17: Plastic products; H18: Nonmetal mineral products; H19: Smelting and pressing of ferrous metals; H20: Smelting and pressing of nonferrous metals; H21: Metal products; and H23: Special equipment, they fail to achieve optimized resource allocation and have decreasing returns to scale, which shows that they are facing the problem of innovation resource waste, and they only obtain comparatively small increase in output by enlarging input scale.
Knowledge,innovation and firm performance in high- and low-technology regimes [J].Journal of Business Venturing,2006,21(15):687-703
Online since: October 2011
Authors: Xiao Yong Zhang, Xiao Jun He, Ming Bo Wu, Ru Chun Li, Ming Dong Zheng, Mo Xin Yu, Xian Ping Dong, Ping Hua Ling, Nan Zhao
Nanostructured transition metal oxides are considered as excellent materials in terms of achieving high specific capacitance in ECs.
Therefore, efforts have been devoted to disperse nano ruthenium oxides on porous materials to decrease the cost of electrode materials in ECs [2].
Activated carbon (AC) is one of the porous materials because of its unique surface characteristics.
Acknowledgements This work is partly supported by NSFC (No. 50802002), Natural Science Foundation of Anhui Province (KJ2008A120 and 2008JQ1026ZD).
Chemical Engineering Journal 2010, 158: 129−142.
Therefore, efforts have been devoted to disperse nano ruthenium oxides on porous materials to decrease the cost of electrode materials in ECs [2].
Activated carbon (AC) is one of the porous materials because of its unique surface characteristics.
Acknowledgements This work is partly supported by NSFC (No. 50802002), Natural Science Foundation of Anhui Province (KJ2008A120 and 2008JQ1026ZD).
Chemical Engineering Journal 2010, 158: 129−142.
Online since: December 2010
Authors: V.V. Ustinov, M.A. Milyaev, T.P. Krinitsina, L.I. Naumova, V.V. Proglyado, N.S. Bannikova
The MR-sensitivity of these materials can be comparable with that in permalloy films but in a wider range of magnetic fields.
To minimize the error in the step height measurements caused by different optical constants of a substrate and a deposited material, the same material was deposited twice.
The first layer of the material is used as a bottom layer with a thickness of 600 Å.
The work is supported by the Program of the Presidium of Russian Academy of Sciences, grant No. 27, and Russian Foundation on Basic Research, project No. 10-02-00590.
Litian: Journal of Semiconductors Vol. 31 No. 2 (2010), p. 024005-1
To minimize the error in the step height measurements caused by different optical constants of a substrate and a deposited material, the same material was deposited twice.
The first layer of the material is used as a bottom layer with a thickness of 600 Å.
The work is supported by the Program of the Presidium of Russian Academy of Sciences, grant No. 27, and Russian Foundation on Basic Research, project No. 10-02-00590.
Litian: Journal of Semiconductors Vol. 31 No. 2 (2010), p. 024005-1
Online since: November 2013
Authors: T. Kishen Kumar Reddy, B. Srivastha, B. Majumdar, M. Sowjanya
Process parameters such as wheel speed, nozzle-wheel gap, melt ejection temperature and pressure and material properties such as surface tension and viscosity predominantly affect the puddle, which in turn influences the formation of amorphous ribbons.
The physical properties of air and copper wheel have been taken from the in-built material database of ANSYS Fluent.
Carpenter &P.H.Steen,Journal of materials science, vol.27, 1992, pp. 215-225
Tseng, Metallurgical and materials transaction B, Vol. 26B, 1995,pp.1199-1208
Srinivas, B.Majumdar, G.Phanikumar, and D.Akhtar, Metallurgical and materials transactions B,2011
The physical properties of air and copper wheel have been taken from the in-built material database of ANSYS Fluent.
Carpenter &P.H.Steen,Journal of materials science, vol.27, 1992, pp. 215-225
Tseng, Metallurgical and materials transaction B, Vol. 26B, 1995,pp.1199-1208
Srinivas, B.Majumdar, G.Phanikumar, and D.Akhtar, Metallurgical and materials transactions B,2011
Online since: March 2013
Authors: Zhi Tao Lv, Kui Hua Mei, Ji Wen Zhang
Properties of the filling material.
It is important to select appropriate filling material for adhesive anchors.
Carbon fiber products (CFP)-a construction material for the next century.
Construction and Building Materials, Vol.14(3), (2000), p.157 [6] Burong Zhang, Brahim Benmokrane.
Journal of Materials in Civil Engineering, Vol.14(5), (2002), p.399
It is important to select appropriate filling material for adhesive anchors.
Carbon fiber products (CFP)-a construction material for the next century.
Construction and Building Materials, Vol.14(3), (2000), p.157 [6] Burong Zhang, Brahim Benmokrane.
Journal of Materials in Civil Engineering, Vol.14(5), (2002), p.399
Online since: August 2018
Authors: Jiří Zach, Vítězslav Novák
Acknowledgements
This paper was written under the project FAST-S-17-3874 "Unique analytical methods for assessing the relationship between properties and structure of building materials based on alternative raw materials"
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