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Ken-ichi Machida

Ken-ichi Machida

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 48 15239 13733 1192 1081 247 8293

Ken-ichi Machida publications per year

The chart shows the history of publications by Ken-ichi Machida between 1979 and 2023, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ken-ichi Machida published across 45 years, from 1979 to 2023, averaging 6.6 papers a year. Output peaked at 25 publications in 2006. 1 of the 296 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1979 to 2023. Vertical axis: number of publications, 0 to 25. Peak 25 publications in 2006. 1979: 3 publications 1980: 5 publications 1981: 3 publications 1982: 4 publications 1983: 2 publications 1984: 3 publications 1985: 3 publications 1986: 5 publications 1987: 3 publications 1988: 2 publications 1989: 2 publications 1990: 1 publication 1991: 4 publications 1992: 9 publications 1993: 10 publications 1994: 10 publications 1995: 13 publications 1996: 14 publications 1997: 13 publications 1998: 11 publications 1999: 13 publications 2000: 7 publications 2001: 2 publications 2002: 6 publications 2003: 11 publications 2004: 15 publications 2005: 14 publications 2006: 25 publications 2007: 14 publications 2008: 14 publications 2009: 12 publications 2010: 10 publications 2011: 8 publications 2012: 6 publications 2013: 2 publications 2014: 4 publications 2015: 1 publication 2016: 2 publications 2017: 1 publication 2018: 2 publications 2019: 0 publications 2020: 3 publications 2021: 3 publications 2022: 0 publications 2023: 1 publication
1979 2023

296 publications in total across all disciplines

View publications per year as a table
Ken-ichi Machida: publications per year, 1979 to 2023
Year Publications
1979 3
1980 5
1981 3
1982 4
1983 2
1984 3
1985 3
1986 5
1987 3
1988 2
1989 2
1990 1
1991 4
1992 9
1993 10
1994 10
1995 13
1996 14
1997 13
1998 11
1999 13
2000 7
2001 2
2002 6
2003 11
2004 15
2005 14
2006 25
2007 14
2008 14
2009 12
2010 10
2011 8
2012 6
2013 2
2014 4
2015 1
2016 2
2017 1
2018 2
2019 0
2020 3
2021 3
2022 0
2023 1
Total 296
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Ken-ichi Machida publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Ken-ichi Machida sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 241–260 publications, is where this scientist sits. 61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61–80 publications 1,295+

This scientist: 247 publications — 49th percentile

49% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100 247
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Ken-ichi Machida D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Ken-ichi Machida sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 48–49 D-Index, is where this scientist sits. 40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40–41 D-Index 159+

This scientist: 48 D-Index — 16th percentile

16% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835 48
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Ken-ichi Machida is affiliated with Osaka University in Japan and has contributed to research primarily in the fields of Materials Science and Engineering. Their work spans several subfields, including Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering, Atomic and Molecular Physics, and Automotive Engineering.

The scientist's research topics focus largely on the magnetic properties of materials and advancements in battery technologies. Key areas of study include:

  • Magnetic Properties of Alloys
  • Magnetic properties of thin films
  • Magnetic Properties and Applications
  • Advancements in Battery Materials
  • Advanced Battery Technologies Research
  • Advanced Battery Materials and Technologies
  • Extraction and Separation Processes

Ken-ichi Machida has published articles in notable venues such as MATERIALS TRANSACTIONS, Electrochemistry, and IEEE Transactions on Magnetics. Frequent publication venues are:

  • MATERIALS TRANSACTIONS
  • Electrochemistry
  • IEEE Transactions on Magnetics

Recent papers authored or co-authored by Ken-ichi Machida include:

  • Magnetic Properties of Nd-Fe-B Sintered Magnets Produced by Reduction-Grain Boundary Diffusion Process with Heavy Rare-Earths Compounds and Ca Metal Vapor, 2020, MATERIALS TRANSACTIONS
  • LiNi0.5Mn1.5O4 Cathode Materials Co-Doped with La3+ and S2− for Use in Lithium-Ion Batteries, 2021, Electrochemistry
  • Magnetic Properties and Magnetic Domain Observation of Nd-Fe-B Sintered Magnets Treated by Grain Boundary Diffusion Process with Dy-Al Co-Sorption, 2021, MATERIALS TRANSACTIONS
  • Magnetic Anisotropy Effects on Squareness Ratio of Nd-Fe-B Sintered Magnets With Different Coercivity, 2020, IEEE Transactions on Magnetics
  • Electrochemical Performance of Nanorod-like (La, Zr) Co-Doped Li-rich Li1.2Ni0.2Mn0.6O2 Cathodes for Use in Lithium-Ion Batteries, 2021, Electrochemistry

Collaborations have involved several frequent coauthors, indicating active research partnerships. These include:

  • Hiroaki Nishio
  • Masaru Uenohara
  • Wencong Wang
  • Hiromasa Hanzawa
  • Kohei Miyazaki

Best Publications

  • Preparation of CaAlSiN3:Eu2+ Phosphors by the Self-Propagating High-Temperature Synthesis and Their Luminescent Properties

    Xianqing Piao;Ken-Ichi Machida;Takashi Horikawa;Hiromasa Hanzawa

  • Characterization and luminescence properties of Sr2Si5N8:Eu2+ phosphor for white light-emitting-diode illumination

    Xianqing Piao;Takashi Horikawa;Hiromasa Hanzawa;Ken-ichi Machida

  • Electromagnetic wave absorption properties of α-Fe/Fe3B/Y2O3 nanocomposites in gigahertz range

    Jiu Rong Liu;Masahiro Itoh;Ken-ichi Machida

  • Novel rare earth recovery process on Nd–Fe–B magnet scrap by selective chlorination using NH4Cl

    Masahiro Itoh;Koji Miura;Ken-ichi Machida

  • Template free synthesis and electromagnetic wave absorption properties of monodispersed hollow magnetite nano-spheres

    Fenglong Wang;Jiurong Liu;Jing Kong;Zijun Zhang

  • Preparation of ceria–zirconia sub-catalysts for automotive exhaust cleaning

    Toshiyuki Masui;Tetsuya Ozaki;Ken-ichi Machida;Gin-ya Adachi

  • Preparation and luminescence characteristics of the europium and terbium complexes incorporated into a silica matrix using a sol–gel method

    T. Jin;S. Tsutsumi;Y. Deguchi;K. Machida

  • Grain Interface Modification and Magnetic Properties of Nd–Fe–B Sintered Magnets

    Deshan Li;Shunji Suzuki;Takashi Kawasaki;Ken-ichi Machida

  • Preparation and Luminescence Properties of Organically Modified Silicate Composite Phosphors Doped with an Europium(III) β-Diketonate Complex

    Huihui Li;Satoshi Inoue;Ken-ichi Machida;Gin-ya Adachi

  • Enhanced electromagnetic wave absorption properties of Fe nanowires in gigaherz range

    Jiu-rong Liu;Masahiro Itoh;Masao Terada;Takashi Horikawa

  • Recovery of rare metals from scrap of rare earth intermetallic material by chemical vapour transport

    Kuniaki Murase;Ken-ichi Machida;Gin-ya Adachi

  • The luminescent properties of divalent europium complexes of crown ethers and cryptands

    Jianzhuang Jiang;Nobuyuki Higashiyama;Ken-ichi Machida;Gin-ya Adachi

  • Luminescence properties of Eu(II)-borates and Eu2+- activated Sr-Borates

    K. Machida;G. Adachi;J. Shiokawa

  • Facile synthesis of hollow porous cobalt spheres and their enhanced electromagnetic properties

    Cuizhu He;Song Qiu;Xinzhen Wang;Jiurong Liu

  • Magnetic and electromagnetic wave absorption properties of α-Fe∕Z-type Ba-ferrite nanocomposites

    Jiu Rong Liu;Masahiro Itoh;Ken-ichi Machida

  • Photoluminescence Properties of Ca2Si5N8:Eu2+ Nitride Phosphor Prepared by Carbothermal Reduction and Nitridation Method

    Xianqing Piao;Takashi Horikawa;Hiromasa Hanzawa;Ken-Ichi Machida

  • Luminescence properties of lanthanide complexes incorporated into sol-gel derived inorganic-organic composite materials

    Tetsuro Jin;Satoshi Inoue;Shuji Tsutsumi;Ken-ichi Machida

  • Preparation of (Sr1- xCax)2Si5N8 /Eu2+ solid solutions and their luminescence properties

    Xianqing Piao;Takashi Horikawa;Hiromasa Hanzawa;Ken-ichi Machida

  • Luminescence properties of CaAlSiN3:Eu2+ phosphor prepared by direct-nitriding method using fine metal hydride powders

    Hyo Sung Kim;Ken-ichi Machida;Takashi Horikawa;Hiromasa Hanzawa

  • Self-propagating high temperature synthesis of yellow-emitting Ba2Si5N8:Eu2+ phosphors for white light-emitting diodes

    Xianqing Piao;Ken-ichi Machida;Takashi Horikawa;Hiromasa Hanzawa

  • Acetate reduction synthesis of Sr2Si5N8:Eu2+ phosphor and its luminescence properties

    Xianqing Piao;Ken-ichi Machida;Takashi Horikawa;Bonggoo Yun

Frequent Co-Authors

Gin-ya Adachi
Gin-ya Adachi Osaka University
Hirotaro Mori
Hirotaro Mori Osaka University
Satoshi Inoue
Satoshi Inoue Saitama Medical University
Masahiko Shimada
Masahiko Shimada Tohoku University
Takao Sakata
Takao Sakata Osaka University
Fenglong Wang
Fenglong Wang Shandong University
Masaru Ichikawa
Masaru Ichikawa Hokkaido University
D. Fruchart
D. Fruchart Centre national de la recherche scientifique, CNRS
Wei Liu
Wei Liu Shandong University
Atsushi Fukuoka
Atsushi Fukuoka Hokkaido University

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