Faculty Profiles - YAMASHITA Seiji

Papers - YAMASHITA Seiji

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Design of Heat Emission Controlled Spherical Container Constructed with Skeletal Ceramic Units Based on Heat Transfer Analysis

Himoto Iori, Yamashita Seiji, Kita Hideki

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN Vol. 49 ( 9 ) page： 850 - 863 2016

Language：English Publisher：The Society of Chemical Engineers, Japan

Authors have been developing a spherical container having an inner wall constructed with skeletal ceramic units for transporting molten aluminum. This container is expected to provide innovative weight reduction and higher heat retaining property compared with current cylindrical containers having an inner wall made of castable refractory. In this study, a spherical inner wall with a combinative structure was designed: molten contacting part of the inner wall was constructed with skeletal unit made of reaction bonded silicon nitride (RBSN), while the non-contacting part with molten was constructed with skeletal unit made of aluminum titanate (AT). The quantity of heat emission from the container, temperature drop of molten in the container and thermal stress at the inner wall, while holding the molten, were simulated by heat transfer analysis. As a result, the spherical container reduced the quantity of heat emission compared with an inner wall constructed with only the RBSN unit, and was more reliable compared with that with only the AT unit. Thus, the new inner wall which enables a combination of light weight, high heat retaining property and reliability was proposed.

DOI： 10.1252/jcej.15we122

Scopus

CiNii Research

Hetero Coagulation of Layered Metal Hydroxide Salt and Nanoparticles

YAMASHITA Seiji

Hosokawa Powder Technology Foundation ANNUAL REPORT Vol. 24 ( 0 ) page： 129 - 132 2016

Language：Japanese Publisher：Hosokawa Powder Technology Foundation

Layered metal hydroxide salts powder have anisotropic surface charge on the plate-like particles derived from their layered crystal structure. The aggregation structure of layered metal hydroxide in the water phase were specific such as cardhouse structure because of surface electrostatic charge distribution depend on the pH condition. We suggest the partly hetero coagulation structure using the electrostatic charge distribution on the surface of layered metal hydroxide particle as newly anisotropic composite process. In this study, Mg-based layered hydroxide salt particle, which was our developed multi-step chemical heat storage material, and sub-micron Al2O3 particles were used as hetero coagulation particle for the reaction packing bed on chemical heat storage system. The hetero coagulation structure of Mg-LHS and Al2O3 particles was generated at pH 7. It was found that hetero coagulation particles was effective to make packing bed for high reaction speed and high thermal storage density. It was assumed that packing bed of hetero coagulation powder have porous structure with high density and the pass structure of water vapor.

DOI： 10.14356/hptf.14122

CiNii Research

Fabrication and filtration property of porous ceramic filter with ceramic fiber

Seiji Yamashita, Takuma Shimizu and Hideki Kita

Filtration and separation symposium 2015 in collaboration with INCHEM TOKYO page： 9-12 2015.11

Authorship：Lead author Language：Japanese

Porous ceramics have been applied for large area such as filter, insulator, catalyst
support due to these high chemical stability and heat resistance. Porous gypsum mold was
used in slip casting process used ceramic slurry and these property have been analyzed
experimentally. However, the mechanical strength and chemical stability of gypsum mold
were not enough high in order to improve the productivity and durability. In this study,
porous Al 2 O 3 / Al 2 O 3 fiber composite filter was fabricated by template free method using
anisotropic sintering behavior of Al 2 O 3 particle and fiber. The effect of experimental
condition on permeability, mechanical strength and slip casting property of Al 2 O 3 slurry of
porous Al 2 O 3 filer with Al 2 O 3 fiber was investigated as compared with gypsum mold.

OS8-38 Statistical Fracture Analysis of Si-SiC Porous Ceramics with Skeletal Structure(Advanced materials,OS8 Fatigue and fracture mechanics,STRENGTH OF MATERIALS)

Himoto Iori, Nakashima Airi, Yamashita Seiji, Kita Hideki

The Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics Vol. 2015.14 ( 0 ) page： 148 2015

Basic study on development of thermal storage technology at 500°C using CaO/H<inf>2</inf>O hydration reaction

Kuwata K., Kobayashi N., Esaki T., Iwase D., Kita H., Yamashita S.

Transport and Energy Processes 2015 - Core Programming Area at the 2015 AIChE Annual Meeting page： 66 - 71 2015

Synthesis of Magunesium based layered hydroxide salts and its chemical heat storage properties Reviewed

Seiji Yamashita, Yoshimasa Sugie, Hideki Kita

page： 4 2014

幾何学的側面からの熱制御容器の設計 Reviewed

北英紀、樋本伊織、山下誠司

セミックス Vol. 49 ( 8 ) page： 680-685 2014

層状亜鉛水酸化物を前駆体とした機能性粒子の合成 Reviewed

山下誠司、藤　正督、高井千加、白井　孝

名古屋工業大学先進セラミックス研究センター年報 page： 29-33 2013

Investigation of the Morphological Change into the Fabrication of ZnO Microtubes and Microrods by a Simple Liquid Process using Zn Layered Hydroxide Precursor Reviewed

S. Yamashita, M. Fuji, C. Takai, T. Shirai

Ceramics Transaction Vol. 236 page： 25-31 2012

Liquid phase synthesis of ZnO microrods highly oriented on the hexagonal ZnO sheets

S. Yamashita, H. Watanabe, T. Shirai, M. Fuji, M. Takahashi

Advanced Powder Technology Vol. 22 ( 2 ) page： 271-276 2011

Morphological Change during Drying in the Synthesis of ZnO Microtubes from an Aqueous Solution

S. Yamashita, H. Watanabe, T. Shirai, M. Fuji, M. Takahashi

Ceramics Transaction Vol. 219 page： 143-149 2010

Synthesis of ZnO Microtubes by a Facile Aqueous Solution Process Reviewed

L. Lin, H. Watanabe, M. Fuji, T. Endo, S. Yamashita, M. Takahashi

Journal of the American Ceramic Society Vol. 92 page： 165-167 2009

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