Plenary Lecture

Why Soft Processing(=Low-Energy Production) of Advanced Ceramic Materials is Important for Sustainable Society

Professor Masahiro Yoshimura
Promotion Center for Global Materials Research
Dept of Mater. Sci. and Eng.
National Cheng Kung University
Tainan, Taiwan

Abstract: As well as organic and/or bio- materials, advanced inorganic materials, most of metallurgical materials, semiconductors and ceramic materials have been used in wide area of applications like structural, mechanical, chemical, electrical, electronic, optical, photonic, biological, medical, etc. Most of them except for bio-minerals have never been produced in natural processes via biological systems. Thus they have generally been fabricated artificially and/or industrially by so-called high-technology, where high temperature, high pressure, vacuum, molecule, atom, ion, plasma, etc. have been used for their fabrications, then consumed huge amount of resources and energies thus exhausted huge amounts of wastes: materials, heats and entropy.
Considering the lowering of total energy consumption, we have challenged to fabricate those advanced inorganic materials with desired shape/size/location,etc. directly in low energetic routes using aqueous solutions since 1989 when we found a method to fabricate BaTiO3 film on Ti substrate in a Ba(OH)2 solution by Hydrothermal Electrochemical[HEC] method at low temperatures of 60-200 C. We proposed in 1995 an innovative concept and technology, “Soft Processing” or “Soft Solution Processing,” which aims low energetic (=environmentally friendly) fabrication of shaped, sized, located, and oriented inorganic materials in/from solutions. It can be regarded as one of bio-inspired processing, green processing, or eco-processing. When we have activated/stimulated interfacial reactions locally and/or moved the reaction point dynamically, we can get patterned ceramic films directly in solution without any firing, masking nor etching. Direct Patterning of CdS, PbS and CaWO4 on papers by Ink-Jet Reaction method and LiCoO2 by electrochemically activated interfacial reactions. Furthermore, we have succeeded to fabricate BaTiO3 patterns on Ti by a laser beam scanning and carbon patterns on Si by plasma using a needle electrode scanning directly in solutions. Successes in TiO2 and CeO2 patterns by Ink-Jet Deposition, where nano-particles are nucleated and grown successively on the surface of substrate thus become dense even below 300 C will be presented .A recent novel subject, Soft Processing for various nano-carbons including Graphene and functionalized Graphene, will be introduced. Where we have succeeded to prepare functionalized Graphene Ink via successive processes under ambient temperature and pressure conditions.(3-5)
1) MRS Bulletin,25[9],Sept. issue 2000, special issue for Soft Processing of Advanced Inorganic Materials ,Guest Editor:M. Yoshimura and J. Livage.
2) Yoshimura, M., J. Mater. Sci.,41 [5],1299-1306 (2006), 43[7]2085-2103(2008).
3) J. Senthilnathan, M.Yoshimura et al., J. Mater Chem A,(2014) 2, 3332, J. Mater. Chem A, 3, 3035 (2015)
4) Sanjeeva Rao, K and Yoshimura, M et al. Adv. Funct. Mater.,25,298(2015)  
5) E. Satheeshkumar,T. Makaron,Y. Gogotsi,M. Yoshimura, Sci, Repts,Aug. 25,(2016)

Brief Biography of the Speaker: Masahiro YOSHIMURA was graduated for B.S. at 1965, M.S. at 1967 and D. Sc. in Engineering at 1970 from Tokyo Institute of Technology, Japan. Then 1970,Research Assoc.,1978 Assoc. Prof. ,1985 Full Prof. in Materials and Structures Laboratory, Tokyo Institute of Technology. During those periods, 1973-1975 Post Doc. in 3 CNRS Labs.(Odeillo, Orleans and Paris) in France, and 1975-1977 in Mass. Inst. Tech., USA. He was the Director of Center for Materials Design for 1996-2002. He retired at 2008, Professor Emeritus,from Tokyo Institute of Technology. After experienced several Visiting/Guest Profs. In Tohoku Univ., Japan, Univ. Limerick, Ireland, ETH Zurich, Switzerland, Inst. Metal. Res., CAS, Shenyang, China, etc. he has been in National Cheng Kung Univ., Taiwan since Feb. 2010 as a Visiting Chair Prof. then now Distinguished Chair Prof. and Director of Promotion Center for Global Materials Research , NCKU, since July 2011. He received ,Academic Award (1993) from The Ceramic Soc. Japan, 10th Fulrath Pacific Award(1987) and Fellow(1995) from The Amer. Ceram. Soc., International Award(2001) from European Ceramic Soc., IUMRS Somiya Award for International Collaborative Work, IUMRS(2002), Honorary Members in MRS –India (2003), Research Award, Ministry of Education, Culture & Science, Japan(2007), Lee Hsun Award, Institute of Metal Research, CAS, Shenyang, China(2008) and Honorable Permanent Resident Visa,Taiwan(2012), Honorary Fellow of European Ceramic Society(2017). Distinguished Life Member of American Ceramic Society(2017),etc. He is nominated form Thomson-Reuter as ISI Highly-Cited Researcher(2001). Now he has >730 peer-reviewed Papers, 84 Reviews,3 Books (44 Book Chapters) & 30 Patents, and >17,000 Internatinal. Citations with h-index >62. He has served as 18 Organizing Chairs, i.e IUMRS-ICA,Chiba,1997, IUMRS-ICAM,Yokohama,2003, and International Conference in Hydrothermal Reactions,Sendai,2006 , 6th ISHA,2016,Tainan,Taiwan.,etc. joined as 64 Advisory/Organizing Committees, 21 Prenary Lectures, i.e. MS&T, San Francisco(2000), ICMAT, Singapore (2003) ,Hydrothermal/Solvothermal Symposia, Kochi, Japan(2000) Mysore, India (2004),Sendai,Japan (2006), Nottingham, UK (2008), Beijing,China (2010), etc. and gave >200 Invited/Keynote Lectures in International Meetings. He is one of Editors in Solid State Science(since 1988), J. Nanomaterials(since 2004), Nano Letters(2002-2005),etc. and Guest Editors in MRS Bull,Oct.1994 &Sept.2000, Euro. J.Solid State and Inorg. Chem. 1995, Solid State Ionics,152/154,2002, J.Mater.Sci.2006&2007,etc. He is Founding President(2006-2008), International Solvothermal and Hydrothermal Association (ISHA), President of the Advisory Board(2010-2014),. Chairman of the Nomination Committee,2002,2004 & 2006 in The World Academy of Ceramics (WAC), An Advisory Officer, IUMRS(Audit Elect 2007-2008,Former President of MRS-Japan)

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