Papers - OKA Ryohei

Synthesis and Characterization of Ca_1−xEu_xZrO₃ as Environmentally Friendly Inorganic Yellow Pigments Reviewed International journal

Kohei Minagawa, Yuichi Nishiguchi, Ryohei Oka, Toshiyuki Masui

ACS Omega   6 ( 4 )   3411 - 3417   2021.01

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

DOI： 10.1021/acsomega.0c05959

Effect of [MnO₆] Octahedra to the Coloring Mechanism of (Li_1−xNa_x)₂MnO₃ Reviewed International journal

Ryohei Oka, Kohei Kusukami, Toshiyuki Masui

ACS Omega   5 ( 22 )   13108 - 13114   2020.05

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

DOI： 10.1021/acsomega.0c01071

Improvement of Near-infrared (NIR) Reflectivity and Black Color Tone by Doping Zn²⁺ into the Ca₂Mn_0.85Ti_0.15O₄ Structure Reviewed International journal

Ryohei Oka, Senri Iwasaki, Toshiyuki Masui

RSC Advances   9 ( 66 )   38822 - 38827   2019.11

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry  

DOI： 10.1039/c9ra07849e

Submicron-Sized Phosphors Based on Hexagonal Rare Earth Oxycarbonate for Near-infrared Excitation and Emission Reviewed International journal

Mizuki Watanabe, Yasuhiro Sejima, Ryohei Oka, Shintaro Ida, Toshiyuki Masui

Journal of Asian Ceramic Societies   7 ( 4 )   502 - 508   2019.10

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Taylor and Francis Group  

DOI： 10.1080/21870764.2019.1673137

Enhancement of Near-infrared Emission of Neodymium-Doped Monoclinic Gadolinium Phosphate Nanophosphors by Surface Coating with Calcium Phosphate Reviewed International journal

Mizuki Watanabe, Norifumi Yamamoto, Tomoaki Matsuo, Ryohei Oka, Shintaro Ida, Toshiyuki Masui

Journal of Asian Ceramic Societies   7 ( 4 )   509 - 517   2019.10

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Taylor and Francis Group  

DOI： 10.1080/21870764.2019.1673138

Synthesis and Color Evaluation of Ta⁵⁺-Doped Bi₂O₃ Reviewed International journal

Ryohei Oka, Yusuke Shobu, Toshiyuki Masui

ACS Omega   4 ( 4 )   7581 - 7585   2019.04

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society  

DOI： 10.1021/acsomega.9b00555

Novel Environmentally Friendly Inorganic Orange Pigments Based on Ca₁₄Al₁₀Zn₆O₃₅ Reviewed

Ryohei Oka, Takashi Kosaya, Toshiyuki Masui

Chemistry Letters   47 ( 12 )   1522 - 1525   2018.10

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Chemical Society of Japan  

DOI： 10.1246/cl.180744

Synthesis and Characterisation of Ba(Zn_1−xCo_x)₂Si₂O₇ (0 ≤ x ≤ 0.50) for Blue-violet Inorganic Pigments Reviewed International journal

Takashi Tsukimori, Yusuke Shobu, Ryohei Oka, Toshiyuki Msaui

RSC Advances   8 ( 16 )   9017 - 9022   2018.02

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry  

DOI： 10.1039/c8ra00101d

Synthesis and Characterisation of SrY_2−xCe_xO₄ as Environmentally Friendly Reddish-brown Pigments Reviewed International journal

Ryohei Oka, Yusuke Shobu, Fumiya Aoyama, Takashi Tsukimori, Toshiyuki Masui

RSC Advances   7 ( 87 )   55081 - 55087   2017.12

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry  

DOI： 10.1039/c7ra10250j

Perovskite-type ALnO₃ (A = Ca, Sr, Ba; Ln = Ce, Pr, Tb) Oxides as Environmentally Friendly Yellow Pigments Reviewed

Ryohei Oka, Takashi Tsukimori, Hiroki Inoue, Toshiyuki Masui

Journal of the Ceramic Society of Japan   125 ( 8 )   652 - 656   2017.08

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Ceramic Society of Japan  

DOI： 10.2109/jcersj2.17118

Synthesis and Characterization of Bi₄Zr₃O₁₂ as an Environment-friendly Inorganic Yellow Pigment Reviewed International journal

Takashi Tsukimori, Ryohei Oka, Toshiyuki Masui

Dyes and Pigments   139   808 - 811   2017.01

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

DOI： 10.1016/j.dyepig.2017.01.013

Synthesis and Characterization of Black Pigments Based on Calcium Manganese Oxides for High Near-infrared (NIR) Reflectance Reviewed International journal

Ryohei Oka, Toshiyuki Masui

RSC Advances   6 ( 93 )   90952 - 90957   2016.09

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry  

DOI： 10.1039/c6ra21443f