Catalogue Search | MBRL
Are you sure you want to remove the book from the shelf?
{{itemTitle}}
287,333
result(s) for
"ceramics"
Sort by:
Dual relaxation behaviors and large electrostrictive properties of Bi.sub.0.5Na.sub.0.5TiO.sub.3-Sr.sub.0.85Bi.sub.0.1TiO.sub.3 ceramics
Lead-free ceramics (1 - x)Bi.sub.0.5Na.sub.0.5TiO.sub.3-xSr.sub.0.85Bi.sub.0.1TiO.sub.3 (BNT-xSBT, x = 0.4, 0.5, 0.6 and 0.7) were prepared by a solid-state reaction process. Coexistence of ferroelectric relaxation at low temperature and Maxwell-Wagner dielectric relaxation at high temperature was revealed for the first time in this system. Meanwhile, hysteresis-free P-E loops combined with a very high piezoelectric strain coefficient (d.sub.33) of 1658 pC/N concurrently with large electrostrictive coefficient Q = 0.287 m.sup.4C.sup.-2 were achieved. The ferroelectric relaxor behavior and large electrostrictive strain might be linked to easy reorientation and reversal of ergodic PNRs and the combined effect of Bi off-center position and lone pair electrons.
Journal Article
Ceramics : 400 years of British collecting in 100 masterpieces
The National Trust's ceramic collection is vast and encyclopaedic, numbering approximately 75,000 artefacts, housed in 250 historic properties in England, Wales and Northern Ireland. What is distinct about the collection are the individual stories behind these objects that go beyond mere place and date of production, revealing the very personal histories of ownership, display, taste and consumption. Collectively, patterns emerge from these narratives documenting the acquisition, patronage and collecting of ceramics among the British aristocracy and gentry over four centuries. Some of these revelations are obvious, others are surprising and will stimulate new ways of understanding the material. One hundred stories have been selected from this rich treasure trove of ceramics from Asia, Europe, Britain and the Americas. Rather than being presented in the usual chronological order by production date or divided by material, geography or use, this ground-breaking publication presents the material in the order these objects begin to appear in elite British households, based on documentary evidence in the form of original invoices, inventories, auction catalogues, dealer archives, paintings, and photographs. No other collection in the world has such a breadth and depth of provenance to present this critical timeline. Historic country house collections are assembled over centuries, with multiple layers of acquisition history. Rather than presenting the objects in isolation, where possible and appropriate the ceramics are illustrated in their original interiors. Following an introduction, the individual entries focus on production, exchange and appreciation, placing the objects in the socio-economic environment in which they were created for a broader understanding of their relevance today.
Book
Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na.sub.xBi.sub.yTiO.sub.3-0.06Ba.sub.zTiO.sub.3 ceramics
Nonstoichiometry lead-free 0.94Na.sub.xBi.sub.yTiO.sub.3-0.06Ba.sub.zTiO.sub.3 (N.sub.xB.sub.yT-0.06B.sub.zT) (from x = y = 0.5, z = 1.00 to x = 0.5, y = 0.534, z = 1.02) ceramic compositions were prepared by a conventional solid-state route. XRD shows that the compositions are at a morphotropic phase boundary where rhombohedral and tetragonal phases coexist. The depolarization temperature (T.sub.d) can be lowered by modifying x, y and z. The pyroelectric coefficient (p) of nonstoichiometry N.sub.xB.sub.yT-0.06B.sub.zT compositions is greatly increased, compared with stoichiometry NBT-0.06BT composition, from 3.15 x 10.sup.-4 C m.sup.-2 °C.sup.-1 at room temperature (RT) and 23.9 x 10.sup.-4 C m.sup.-2 °C.sup.-1 at T.sub.d, and reaches maxima of 6.99 x 10.sup.-4 C m.sup.-2 °C.sup.-1 at RT and 75.3 x 10.sup.-4 C m.sup.-2 °C.sup.-1 at T.sub.d for x = y = 0.52 and z = 1. The figures of merits, F.sub.i, F.sub.v, and F.sub.D, also have been improved from 1.12 x 10.sup.-10 m v.sup.-1 and 0.021 m.sup.2 C.sup.-1 to 2.50 x 10.sup.-10 m v.sup.-1, 0.047 m.sup.2 C.sup.-1 and 16.63 x 10.sup.-6 Pa.sup.-1/2, respectively, for N.sub.0.52B.sub.0.52T-0.06BT composition at RT. Furthermore, N.sub.0.52B.sub.0.52T-0.06BT composition shows a huge enhancement in F.sub.i, F.sub.v and F.sub.D to 26.9 x 10.sup.-10 m v.sup.-1, 0.39 x 10.sup.-10 m.sup.2 C.sup.-1 and 138.7 x 10.sup.-6 Pa.sup.-1/2, respectively, at T.sub.d. The same composition also presents F.sub.C values which are ~2.58 and ~2.86 (x10.sup.-9 C cm.sup.-2 °C.sup.-1) at RT at 100 and 1000 (Hz). N.sub.0.5B.sub.0.534T-0.06BT and N.sub.0.5B.sub.0.534T-0.06B.sub.1.02T compositions show a large p values at a wide temperature range. The enhanced pyroelectric properties make nonstoichiometry N.sub.0.52B.sub.0.52T-0.06BT composition a promising candidate for pyroelectric and other applications at wide temperatures range.
Journal Article
The teabowl : East & West
\"The teabowl has become an iconic ceramic form in recent years. Having travelled from the East, where it was an inherent part of the Japanese tea ceremony, it has evolved and adapted to become something very different in the West. Revered for its oriental associations and its connotations of sophistication and simplicity, the teabowl enjoys an elevated status. Here Bonnie Kemske looks at the form as a whole, considering the history and ideas behind the original tea ceremonies, to how it travelled to the West and the way it is used today. She also explores the wide range of teabowls being made today and the contemporary, international potters making them. The book also tackles some difficult questions, notably, how has the concept of the teabowl changed as it has been reinvented in contemporary ceramics? How does it sit in relation to its history? This book is wide in scope, thorough in detail, and essential reading for anyone involved in making or using these tactile objects. \"-- Provided by publisher.
Book
Ultra-High Temperature Ceramics
The first comprehensive book to focus on ultra-high temperature ceramic materials in more than 20 years Ultra-High Temperature Ceramics are a family of compounds that display an unusual combination of properties, including extremely high melting temperatures (>3000°C), high hardness, and good chemical stability and strength at high temperatures..
eBook
Advances in ultra-high temperature ceramics, composites, and coatings
Ultra-high temperature ceramics (UHTCs) are generally referred to the carbides, nitrides, and borides of the transition metals, with the Group IVB compounds (Zr & Hf) and TaC as the main focus. The UHTCs are endowed with ultra-high melting points, excellent mechanical properties, and ablation resistance at elevated temperatures. These unique combinations of properties make them promising materials for extremely environmental structural applications in rocket and hypersonic vehicles, particularly nozzles, leading edges, and engine components, etc. In addition to bulk UHTCs, UHTC coatings and fiber reinforced UHTC composites are extensively developed and applied to avoid the intrinsic brittleness and poor thermal shock resistance of bulk ceramics. Recently, highentropy UHTCs are developed rapidly and attract a lot of attention as an emerging direction for ultra-high temperature materials. This review presents the state of the art of processing approaches, microstructure design and properties of UHTCs from bulk materials to composites and coatings, as well as the future directions.
Journal Article