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The E-book "Nucleation and Crystallization of Glasses and Glass-Ceramics" highlights historic perspectives and current research in the field of glass-ceramic technology. Glass-ceramic technology is promising to provide us with materials of high strength, high toughness, unique electrical/electronic or magnetic properties, exceptional optical or unusual thermal or chemical properties. The greater diversity of microstructure-property arrangements and processing routes over glasses and ceramics are responsible that glass-ceramics are the preferred choice of materials in many technical, consumer, optical, medical/dental, electrical/electronic, and architectural fields. This includes increasing uses of glass-ceramic materials for environment and energy applications in the last decades. The positive development of glass-ceramic technology has become true in particular due to the pioneering spirit, resourcefulness, and courage of researchers of the first generation. Extraordinary and, therefore, to be distinguished is the work of the glass-ceramic inventor S. Donald Stookey to whom this Research Topic is dedicated. The authors, all experts in the field of glass-ceramics and based in industry, academia and governmental institutions, contributed to this E-book under the guidance of the Technical Committee 07 "Crystallization and Glass-Ceramics" of the International Commission on Glass (ICG).

Crystal growth --- Nucleation agents --- non-linear optic crystals --- sintering --- ion exchange --- Apatite --- crystal pattering --- ceramming --- glass-ceramic technology --- heterogeneous and homogeneous nucleation

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Advanced Glasses, Composites and Ceramics for High-Growth Industries (CoACH) was a European Training Network (ETN) project (http://www.coach-etn.eu/) funded by the Horizon 2020 program. CoACH involved multiple actors in the innovation ecosystem for advanced materials, composed of five universities and ten enterprises in seven different European countries. The project studied the next generation of materials that could bring innovation in the healthcare, construction, and energy sectors, among others, from new bioactive glasses for bone implants to eco-friendly cements and new environmentally friendly thermoelectrics for energy conversion. The novel materials developed in the CoACH project pave the way for innovative products, improved cost competitiveness, and positive environmental impact. The present Special Issue contains 14 papers resulting from the CoACH project, showcasing the breadth of materials and processes developed during the project.

shear strength --- chitosan --- inorganic gel casting --- glass–ceramic foams --- fly ash --- cellulose fibers --- antibacterial --- solid-liquid interdiffusion (SLID) bonding --- bioactive glass-ceramic --- seawater exposure --- Er3+ luminescence property --- wastes incorporation --- transient-liquid phase bonding (TLPB) --- cellulose modification --- biocompatibility --- glass–ceramic --- GeTe --- lowered zT --- accelerated testing --- elastic modulus --- PCL --- silver --- glass fiber-reinforced polymers --- oxidation resistance --- SOFC --- GFRPs --- high-temperature thermoelectric material --- joining --- waste glass --- diffusion --- hybrid-coating --- glass recycling --- phosphate glass --- dip coating --- graphitization --- geopolymer composite --- direct particle doping --- Thermoelectrics --- flexural biaxial test --- Ba-doping --- residual stresses --- silver-doped mesoporous glass --- ball-on-3-balls test --- glass foams --- Vicryl Plus suture --- DMA --- SOEC --- gravimetric --- skutterudite --- wood-derived biocarbon --- evanescent wave optical fiber sensors --- ageing --- oxyfluoride phosphate glass --- SOC --- PMCs --- fractography --- gel casting --- Zinc --- alkali activation --- mechanical strength --- coatings --- Al-doping --- polydopamine --- testing and aging --- loss of band convergence --- thermal conductivity --- Er2O3-doped particles

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Fuel cells are expected to play a relevant role in the transition towards a sustainable-energy-driven world. Although this type of electrochemical system was discovered a long time ago, only in recent years has global energy awareness, together with newly developed materials and available technologies, made such key advances in relation to fuel cell potential and its deployment. It is now unquestionable that fuel cells are recognized, alongside their possibility to work in the reverse mode, as the hub of the new energy deal. Now the questions are, why are they not yet ready to be used, despite the strong economic support given from the society? What prevents them from being entered into the hydrogen energy scenario in which renewable sources will provide energy when it is not readily available? How much are researchers involved in this urgent step towards change? This book gives a clear answer, engaging with some of the open issues that explain the delay of fuel cell deployment and, at the same time, it opens a window that shows how wide and attractive the opportunities offered by this technology are. Papers collected here are not only specialist-oriented but also offer a clear landscape to curious readers and show how challenging the road to the future is.

Research & information: general --- Technology: general issues --- polymer electrolyte fuel cell --- cyclic current profile --- transient behavior --- pressure drop --- Ohmic resistance --- solid oxide fuel cells (SOFCs) --- ionic conductivity --- Raman spectroscopy --- powder X-ray diffraction --- microbial fuel cell --- low-cost ceramics --- separator --- membrane --- porosity --- pore size --- water absorption --- mercury intrusion --- raman spectroscopy --- powder x-ray diffraction --- doped ceria --- solid oxides fuel cells --- Sm-doped ceria --- high pressure X-ray powder diffraction --- diamond anvil cell --- equation of state --- Rietveld refinement --- SOFC --- reliability --- contamination --- salt --- oxygen starvation --- concentration polarization --- fuel cell application --- microfluidic fuel cell --- power supply --- soft drinks --- hydrogen production --- alkaline water electrolysis --- two-phases flow --- CFD --- two-phase process --- BSCF --- SOEC --- rSOC --- anodic overpotential --- impedance spectroscopy --- sealants --- glass-ceramic --- joining --- CH4 internal reforming --- solid oxide fuel cell --- 2D local control --- cell design optimization --- active site degradation --- tape casting process --- open circuit voltage --- activation energy --- power density --- IT-SOFC --- PEM fuel cell --- useful water --- hydrogen consumption scenarios --- modified fuel utilization

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Fuel cells are expected to play a relevant role in the transition towards a sustainable-energy-driven world. Although this type of electrochemical system was discovered a long time ago, only in recent years has global energy awareness, together with newly developed materials and available technologies, made such key advances in relation to fuel cell potential and its deployment. It is now unquestionable that fuel cells are recognized, alongside their possibility to work in the reverse mode, as the hub of the new energy deal. Now the questions are, why are they not yet ready to be used, despite the strong economic support given from the society? What prevents them from being entered into the hydrogen energy scenario in which renewable sources will provide energy when it is not readily available? How much are researchers involved in this urgent step towards change? This book gives a clear answer, engaging with some of the open issues that explain the delay of fuel cell deployment and, at the same time, it opens a window that shows how wide and attractive the opportunities offered by this technology are. Papers collected here are not only specialist-oriented but also offer a clear landscape to curious readers and show how challenging the road to the future is.

Research & information: general --- Technology: general issues --- polymer electrolyte fuel cell --- cyclic current profile --- transient behavior --- pressure drop --- Ohmic resistance --- solid oxide fuel cells (SOFCs) --- ionic conductivity --- Raman spectroscopy --- powder X-ray diffraction --- microbial fuel cell --- low-cost ceramics --- separator --- membrane --- porosity --- pore size --- water absorption --- mercury intrusion --- raman spectroscopy --- powder x-ray diffraction --- doped ceria --- solid oxides fuel cells --- Sm-doped ceria --- high pressure X-ray powder diffraction --- diamond anvil cell --- equation of state --- Rietveld refinement --- SOFC --- reliability --- contamination --- salt --- oxygen starvation --- concentration polarization --- fuel cell application --- microfluidic fuel cell --- power supply --- soft drinks --- hydrogen production --- alkaline water electrolysis --- two-phases flow --- CFD --- two-phase process --- BSCF --- SOEC --- rSOC --- anodic overpotential --- impedance spectroscopy --- sealants --- glass-ceramic --- joining --- CH4 internal reforming --- solid oxide fuel cell --- 2D local control --- cell design optimization --- active site degradation --- tape casting process --- open circuit voltage --- activation energy --- power density --- IT-SOFC --- PEM fuel cell --- useful water --- hydrogen consumption scenarios --- modified fuel utilization --- polymer electrolyte fuel cell --- cyclic current profile --- transient behavior --- pressure drop --- Ohmic resistance --- solid oxide fuel cells (SOFCs) --- ionic conductivity --- Raman spectroscopy --- powder X-ray diffraction --- microbial fuel cell --- low-cost ceramics --- separator --- membrane --- porosity --- pore size --- water absorption --- mercury intrusion --- raman spectroscopy --- powder x-ray diffraction --- doped ceria --- solid oxides fuel cells --- Sm-doped ceria --- high pressure X-ray powder diffraction --- diamond anvil cell --- equation of state --- Rietveld refinement --- SOFC --- reliability --- contamination --- salt --- oxygen starvation --- concentration polarization --- fuel cell application --- microfluidic fuel cell --- power supply --- soft drinks --- hydrogen production --- alkaline water electrolysis --- two-phases flow --- CFD --- two-phase process --- BSCF --- SOEC --- rSOC --- anodic overpotential --- impedance spectroscopy --- sealants --- glass-ceramic --- joining --- CH4 internal reforming --- solid oxide fuel cell --- 2D local control --- cell design optimization --- active site degradation --- tape casting process --- open circuit voltage --- activation energy --- power density --- IT-SOFC --- PEM fuel cell --- useful water --- hydrogen consumption scenarios --- modified fuel utilization