Synthesis of cerium and gadolinium borides using boron cage compounds as a boron source

Itoh, Hideaki; Tsuzuki, Yuki; Yogo, Toshinobu; Naka, Shigeharu

doi:10.1016/0025-5408(87)90136-x

Cited by 14 publications

(3 citation statements)

References 11 publications

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“…As a result of electronic and magnetic application requirements from technology roadmap consortia [449,450], solids with enhanced refractory properties, deposited at low temperatures, such as the rare-earth borides, silicides, chalcogenides and pnictides, have been explored over the last 40 years [451][452][453][454][455][456]. From these studies, Gd borides (GdB 4 , GdB 6 ), Gd silicides (GdSi 2 ), Gd chalcogenides (Gd 2 O 3 , Gd 2 S 3 ), Gd monopnictides (GdN, GdP, GdAs, GdSb, GdBi) and other complexes (Gd 5 Si 2 B 6 ) have been fabricated and studied extensively.…”

Section: Direct-conversion Heterostructuresmentioning

confidence: 99%

The physics of solid-state neutron detector materials and geometries

Caruso

2010

J. Phys.: Condens. Matter

122

111

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Detection of neutrons, at high total efficiency, with greater resolution in kinetic energy, time and/or real-space position, is fundamental to the advance of subfields within nuclear medicine, high-energy physics, non-proliferation of special nuclear materials, astrophysics, structural biology and chemistry, magnetism and nuclear energy. Clever indirect-conversion geometries, interaction/transport calculations and modern processing methods for silicon and gallium arsenide allow for the realization of moderate- to high-efficiency neutron detectors as a result of low defect concentrations, tuned reaction product ranges, enhanced effective omnidirectional cross sections and reduced electron-hole pair recombination from more physically abrupt and electronically engineered interfaces. Conversely, semiconductors with high neutron cross sections and unique transduction mechanisms capable of achieving very high total efficiency are gaining greater recognition despite the relative immaturity of their growth, lithographic processing and electronic structure understanding. This review focuses on advances and challenges in charged-particle-based device geometries, materials and associated mechanisms for direct and indirect transduction of thermal to fast neutrons within the context of application. Calorimetry- and radioluminescence-based intermediate processes in the solid state are not included.

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Section: Direct-conversion Heterostructuresmentioning

confidence: 99%

The physics of solid-state neutron detector materials and geometries

Caruso

2010

J. Phys.: Condens. Matter

122

111

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Section: Introductionmentioning

confidence: 99%

“…[16] In this report, powders containing both the gadolinium borides and amorphous boron were obtained as products from the thermolysis of the molecular precursor Gd 2 (B 10 H 10 ) 3 . [16] The chromium complex of the B 3 H 8 − species, Cr(B 3 H 8 ) 2 , has also been used as a CVD precursor to form chromium boride materials. [17] Transition metal borohydride complexes, such as Ti(BH 4 )(dme), Hf(BH 4 ) 4 , V(BH 4 ) 2 (dmpe) 2 and Zr(BH 4 ) 4 , have been reported as precursors in the CVD preparation of several metal boride thin films.…”

Section: Introductionmentioning

confidence: 99%

Chemical vapor deposition of metal borides: 6. The formation of neodymium boride thin film materials from polyhedral boron clusters and metal halides by chemical vapor deposition

Kher

Romero

Caruso

et al. 2008

Applied Organom Chemis

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The chemical vapor deposition (CVD) of crystalline thin films of neodymium hexaboride (NdB 6 ) was achieved using either nido-pentaborane(9) or nido-decaborane(14) with neodymium(III) chloride on different substrates. The highly crystalline NdB 6 films were formed at relatively moderate temperatures (835• C, ca. 1 µm/h) and were characterized by scanning electron microscopy, X-ray emission spectroscopy, X-ray diffraction and glow discharge mass spectrometry. The NdB 6 polycrystalline films were found to be pure and uniform in composition in the bulk material. Depositions using CoCl 2 , NdCl 3 and B 5 H 9 as the CVD precursors resulted in the formation of a mixture of NdB 6 and CoB phases, rather than the ternary phase.

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