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Yoshihiko Okada

Nagoya Institute of Technology

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Archive | 1998

Relationship between NMR 29Si Chemical Shifts and FT-IR Wave Numbers in Calcium Silicates

Yoshihiko Okada; Tsuguya Masuda; Minori Takada; Lingling Xu; Takeshi Mitsuda

The relationship between 29Si NMR (chemical shift values), and IR (wave numbers) results is discussed as far as calcium silicates are concerned. This relation shows a good correlation with R = 0.86 for the hydrates and 0.99 for the anhydrates. The results indicate that the higher the polymerization or condensation of silicate tetrahedra the higher the IR wave number and the lower the NMR chemical shift value.

Journal of the American Ceramic Society | 1993

α‐Dicalcium Silicate Hydrate: Preparation, Decomposed Phase, and Its Hydration

Hideki Ishida; Satoru Yamazaki; Kaori Sasaki; Yoshihiko Okada; Takeshi Mitsuda

Journal of the American Ceramic Society | 1994

29Si NMR Spectroscopy of Silicate Anions in Hydrothermally Formed C‐S‐H

Yoshihiko Okada; Hideki Ishida; Takeshi Mitsuda

Journal of the American Ceramic Society | 1994

Formation Processes of β‐C2S by the Decomposition of Hydrothermally Prepared C‐S‐H with Ca(OH)2

Yoshihiko Okada; Kaori Sasaki; Baiqian Zhong; Hideki Ishida; Takeshi Mitsuda

Journal of the American Ceramic Society | 1992

Highly Reactive β‐Dicalcium Silicate: II, Hydration Behavior at 25°C Followed by 29Si Nuclear Magnetic Resonance

Hideki Ishida; Yoshihiko Okada; Takeshi Mitsuda

Journal of the American Ceramic Society | 1994

Characterization of C‐S‐H from Highly Reactive β‐Dicalcium Silicate Prepared from Hillebrandite

Yoshihiko Okada; Hideki Ishida; Kaori Sasaki; J. Francis Young; Takeshi Mitsuda

Journal of the American Ceramic Society | 1993

Highly Reactive β‐Dicalcium Silicate: V, Influence of Specific Surface Area on Hydration

Kaori Sasaki; Hideki Ishida; Yoshihiko Okada; Takeshi Mitsuda

Journal of the American Ceramic Society | 1992

Highly Reactive β‐Dicalcium Silicate: III, Hydration Behavior at 40–80°C

Hideki Ishida; Kaori Sasaki; Yoshihiko Okada; Takeshi Mitsuda

Journal of The Ceramic Society of Japan | 1994

Influence of Starting Materials on the Formation of 1.1-nm-Tobermorite

Yoshihiko Okada; Norifumi Isu; Tsuguya Masuda; Hideki Ishida

Journal of the American Ceramic Society | 1992

Highly Reactive β-Dicalcium Silicate: IV, Ball-Milling and Static Hydration at Room Temperature

Hideki Ishida; Kaori Sasaki; Akihiro Mizuno; Yoshihiko Okada; Takeshi Mitsuda

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Hideki Ishida

Nagoya Institute of Technology

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Takeshi Mitsuda

Nagoya Institute of Technology

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Kaori Sasaki

Nagoya Institute of Technology

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Tsuguya Masuda

Nagoya Institute of Technology

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Hirotsugu Nishido

Okayama University of Science

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Akihiro Mizuno

Nagoya Institute of Technology

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Norifumi Isu

Nagoya Institute of Technology

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Satoru Yamazaki

Nagoya Institute of Technology

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Lingling Xu

Nanjing University

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