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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Materials Science 54 8763 8463 509 489 292 16958

Tadashi Takenaka publications per year

The chart shows the history of publications by Tadashi Takenaka between 1978 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Tadashi Takenaka published across 49 years, from 1978 to 2026, averaging 6 papers a year. Output peaked at 17 publications in 2007. 1 of the 295 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1978 to 2026. Vertical axis: number of publications, 0 to 17. Peak 17 publications in 2007. 1978: 1 publication 1979: 0 publications 1980: 1 publication 1981: 4 publications 1982: 1 publication 1983: 4 publications 1984: 3 publications 1985: 3 publications 1986: 1 publication 1987: 0 publications 1988: 3 publications 1989: 10 publications 1990: 5 publications 1991: 7 publications 1992: 10 publications 1993: 7 publications 1994: 6 publications 1995: 3 publications 1996: 6 publications 1997: 9 publications 1998: 3 publications 1999: 7 publications 2000: 3 publications 2001: 6 publications 2002: 11 publications 2003: 14 publications 2004: 10 publications 2005: 10 publications 2006: 14 publications 2007: 17 publications 2008: 16 publications 2009: 14 publications 2010: 14 publications 2011: 13 publications 2012: 11 publications 2013: 9 publications 2014: 11 publications 2015: 3 publications 2016: 4 publications 2017: 6 publications 2018: 2 publications 2019: 6 publications 2020: 4 publications 2021: 2 publications 2022: 0 publications 2023: 0 publications 2024: 0 publications 2025: 0 publications 2026: 1 publication
1978 2026

295 publications in total across all disciplines

View publications per year as a table
Tadashi Takenaka: publications per year, 1978 to 2026
Year Publications
1978 1
1979 0
1980 1
1981 4
1982 1
1983 4
1984 3
1985 3
1986 1
1987 0
1988 3
1989 10
1990 5
1991 7
1992 10
1993 7
1994 6
1995 3
1996 6
1997 9
1998 3
1999 7
2000 3
2001 6
2002 11
2003 14
2004 10
2005 10
2006 14
2007 17
2008 16
2009 14
2010 14
2011 13
2012 11
2013 9
2014 11
2015 3
2016 4
2017 6
2018 2
2019 6
2020 4
2021 2
2022 0
2023 0
2024 0
2025 0
2026 1
Total 295
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Tadashi Takenaka publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Tadashi Takenaka sits on this spectrum.

No. of scientists
200 400 600 800
Bar chart with 57 bars. Horizontal axis: publications, 50–69 to 1,163+. Vertical axis: number of scientists, 0 to 891. Most scientists, 891, have 190–209 publications. The last bar groups every scientist with 1,163 publications or more. The highlighted bar, 290–309 publications, is where this scientist sits. 50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50–69 publications 1,163+

This scientist: 292 publications — 58th percentile

58% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

View publications distribution as a table
Number of Materials Science scientists by publication count, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
Publications Scientists This scientist
50–69 28
70–89 152
90–109 356
110–129 487
130–149 723
150–169 835
170–189 850
190–209 891
210–229 862
230–249 766
250–269 726
270–289 665
290–309 593 292
310–329 537
330–349 477
350–369 440
370–389 356
390–409 321
410–429 256
430–449 246
450–469 216
470–489 212
490–509 174
510–529 194
530–549 162
550–569 131
570–589 111
590–609 103
610–629 99
630–649 77
650–669 92
670–689 56
690–709 53
710–729 53
730–749 38
750–769 52
770–789 43
790–809 38
810–829 34
830–849 25
850–869 18
870–889 20
890–909 24
910–929 27
930–949 20
950–969 17
970–989 10
990–1,009 16
1,010–1,029 13
1,030–1,049 12
1,050–1,069 9
1,070–1,089 8
1,090–1,109 7
1,110–1,129 9
1,130–1,149 2
1,150–1,162 5
1,163+ 100
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Tadashi Takenaka D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Tadashi Takenaka sits on this spectrum.

No. of scientists
200 400 600
Bar chart with 64 bars. Horizontal axis: D-Index, 40–41 to 165+. Vertical axis: number of scientists, 0 to 667. Most scientists, 667, have 52–53 D-Index. The last bar groups every scientist with 165 D-Index or more. The highlighted bar, 54–55 D-Index, is where this scientist sits. 40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40–41 D-Index 165+

This scientist: 54 D-Index — 32nd percentile

32% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

View D-Index distribution as a table
Number of Materials Science scientists by D-index, Research.com 2026 ranking edition. Based on 12,847 ranked scientists.
D-Index Scientists This scientist
40–41 211
42–43 450
44–45 612
46–47 612
48–49 598
50–51 657
52–53 667
54–55 621 54
56–57 597
58–59 610
60–61 587
62–63 606
64–65 533
66–67 490
68–69 469
70–71 378
72–73 421
74–75 359
76–77 323
78–79 299
80–81 230
82–83 210
84–85 195
86–87 203
88–89 175
90–91 175
92–93 142
94–95 121
96–97 117
98–99 107
100–101 88
102–103 85
104–105 68
106–107 62
108–109 57
110–111 45
112–113 49
114–115 50
116–117 34
118–119 38
120–121 37
122–123 29
124–125 28
126–127 24
128–129 33
130–131 28
132–133 21
134–135 20
136–137 23
138–139 17
140–141 12
142–143 17
144–145 21
146–147 13
148–149 11
150–151 14
152–153 13
154–155 9
156–157 10
158–159 7
160–161 4
162–163 4
164 3
165+ 98
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Overview

Tadashi Takenaka is affiliated with Tokyo University of Science in Japan. Their research primarily focuses on materials science and engineering, with a specific emphasis on ferroelectric and piezoelectric materials. Their work extends into several subfields including materials chemistry, biomedical engineering, electronic, optical and magnetic materials, and electrical and electronic engineering.

Their main topics of study encompass:

  • Ferroelectric and Piezoelectric Materials
  • Multiferroics and related materials
  • Acoustic Wave Resonator Technologies
  • Microwave Dielectric Ceramics Synthesis
  • Dielectric materials and actuators

Takenaka has published extensively with frequent appearances in the following venues:

  • Journal of the Ceramic Society of Japan
  • Applied Physics Express
  • Journal of Asian Ceramic Societies
  • Japanese Journal of Applied Physics
  • Journal of materials research/Pratt's guide to venture capital sources

Significant recent papers authored or coauthored by Takenaka include:

  • "Correlation between depolarization temperature and lattice distortion in quenched (Bi1/2Na1/2)TiO3-based ceramics" (2020), published in Applied Physics Express
  • "Effects of quenching on bending strength and piezoelectric properties of (Bi0.5Na0.5)TiO3 ceramics" (2020), published in Journal of Asian Ceramic Societies
  • "The quenching effects for depolarization temperature of (Bi0.5Na0.5)TiO3 ceramics with Mn dopants" (2020), published in Japanese Journal of Applied Physics
  • "Quenching effects on depolarization temperature and 18O tracer diffusion in (Bi0.5Na0.5)TiO3 ceramics with acceptor and donor additives" (2021), published in Journal of the Ceramic Society of Japan
  • "Doping effects for high-power piezoelectric properties on Ba(Zr,Ti)O3-(Ba,Ca)TiO3-based lead-free piezoelectric ceramics" (2020), published in Journal of the Ceramic Society of Japan

Throughout their career, Takenaka has collaborated frequently with a core group of coauthors, including:

  • Hajime Nagata
  • Yuka Takagi
  • Takao Shimizu
  • Kohtaro Eguchi
  • Isao Sakaguchi

Their research contributions integrate aspects of materials chemistry and engineering to explore the effects of compositional changes and processing conditions on the electrical and mechanical properties of piezoelectric ceramics. This includes investigating quenching effects, dopant impacts, and tracer diffusion phenomena in bismuth sodium titanate-based ceramics and lead-free alternatives, with potential applications in acoustic resonator technologies and dielectric actuators.

Best Publications

  • (Bi1/2Na1/2)TiO3-BaTiO3 System for Lead-Free Piezoelectric Ceramics

    Tadashi Takenaka;Kei-ichi Maruyama;Koichiro Sakata

  • Current status and prospects of lead-free piezoelectric ceramics

    Tadashi Takenaka;Hajime Nagata

  • Electrical Properties and Depolarization Temperature of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3 Lead-free Piezoelectric Ceramics

    Kazushige Yoshii;Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  • Large Piezoelectric Constant and High Curie Temperature of Lead-Free Piezoelectric Ceramic Ternary System Based on Bismuth Sodium Titanate-Bismuth Potassium Titanate-Barium Titanate near the Morphotropic Phase Boundary

    Hajime Nagata;Masaki Yoshida;Yoichi Makiuchi;Tadashi Takenaka

  • Grain Orientation and Electrical Properties of Hot-Forged Bi4Ti3O12 Ceramics

    Tadashi Takenaka;Koichiro Sakata

  • Current Developments and Prospective of Lead-Free Piezoelectric Ceramics

    Tadashi Takenaka;Hajime Nagata;Yuji Hiruma

  • Thermal depoling process and piezoelectric properties of bismuth sodium titanate ceramics

    Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  • Large electrostrain near the phase transition temperature of (Bi0.5Na0.5)TiO3-SrTiO3 ferroelectric ceramics

    Yuji Hiruma;Yoshitaka Imai;Yoshinori Watanabe;Hajime Nagata

  • Phase diagrams and electrical properties of (Bi1/2Na1/2)TiO3-based solid solutions

    Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  • Additive effects on electrical properties of (Bi1/2Na1/2)TiO3 ferroelectric ceramics

    Hajime Nagata;Tadashi Takenaka

  • Lead-free piezoelectric ceramics based on (Bi1/2Na1/2)TiO3-NaNbO3

    Tadashi Takenaka;Takeo Okuda;Koichi Takegahara

  • Ferroelectric and Piezoelectric Properties of (Bi1/2K1/2)TiO3 Ceramics

    Yuji Hiruma;Rintaro Aoyagi;Hajime Nagata;Tadashi Takenaka

  • Piezoelectric properties of (Bi1/2Na1/2)TiO3-based ceramics

    Tadashi Takenaka;K Oichiro Sakata;K Ohji Toda

  • Grain orientation effects on electrical properties of bismuth layer‐structured ferroelectric Pb(1−x)(NaCe)x/2 Bi4Ti4O15 solid solution

    Tadashi Takenaka;Koichiro Sakata

  • Phase Transition Temperatures and Piezoelectric Properties of (Bi1/2Na1/2)TiO3–(Bi1/2K1/2)TiO3–BaTiO3 Lead-Free Piezoelectric Ceramics

    Yuji Hiruma;Hajime Nagata;Tadashi Takenaka

  • Phase transition temperature and electrical properties of (Bi1∕2Na1∕2)TiO3–(Bi1∕2A1∕2)TiO3 (A=Li and K) lead-free ferroelectric ceramics

    Yuji Hiruma;Kazushige Yoshii;Hajime Nagata;Tadashi Takenaka

  • Lead-Free Piezoelectric Ceramics of (Bi1/2Na1/2)TiO3–1/2(Bi2O3·Sc2O3) System

    Hajime Nagata;Tadashi Takenaka

  • Dielectric, piezoelectric and pyroelectric properties of (BiNa)1/2TiO3- based ceramics

    T. Takenaka;K. Sakata

  • Electrical properties of grain-oriented ferroelectric ceramics in some lanthanum modified layer-structure oxides

    Tadashi Takenaka;Koichiro Sakata

  • Lead-free piezoelectric ceramics based on perovskite structures

    T. Takenaka;H. Nagata;Y. Hiruma;Y. Yoshii

Frequent Co-Authors

Hajime Nagata
Hajime Nagata Tokyo University of Science
Hajime Haneda
Hajime Haneda National Institute for Materials Science
Isao Sakaguchi
Isao Sakaguchi National Institute for Materials Science
Naoki Ohashi
Naoki Ohashi National Institute for Materials Science
Hiroshi Funakubo
Hiroshi Funakubo Tokyo Institute of Technology
Takayuki Watanabe
Takayuki Watanabe Kyushu University
Amar S. Bhalla
Amar S. Bhalla The University of Texas at San Antonio
Thomas R. Shrout
Thomas R. Shrout Pennsylvania State University
Takaaki Tsurumi
Takaaki Tsurumi Tokyo Institute of Technology
Takahiro Seki
Takahiro Seki Nagoya University

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