History of Hydrothermal Technology

Byrappa, K.; Yoshimura, Masahiro

doi:10.1016/b978-081551445-9.50003-9

Cited by 188 publications

(173 citation statements)

References 23 publications

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“…Reaction parameters such as the solution pH, temperature and hydrothermal duration determine the nature of the final products. [5][6][7][8][9]11,12 Recently Wang and Kung reported the use of the hydrothermal method to promote the crystallisation of nanosized powders of Ni 0 . 5 Zn 0 .…”

Section: Introductionmentioning

confidence: 99%

Kinetics of the crystallisation of Ni–Zn ferrite powders prepared by the hydrothermal method

Mancera¹,

Ridlova²,

Wang³

et al. 2005

Materials Science and Technology

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Recently published data on the precipitation of Ni-Zn ferrite powders prepared by the hydrothermal method have been analysed in a manner consistent with Avrami theory. The results indicate that the value of the time exponent is due to the growth of spherical particles in a solution which becomes progressively depleted of reactants. The analysis also indicates that the process can be considered to be one in which the particles all start growth from the initiation of the reaction.

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Section: Introductionmentioning

confidence: 99%

Kinetics of the crystallisation of Ni–Zn ferrite powders prepared by the hydrothermal method

Mancera¹,

Ridlova²,

Wang³

et al. 2005

Materials Science and Technology

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“…Recently, considering the properties of the materials are greatly affected by their morphologies, wide range of metal oxide with different morphologies providing great opportunities for the discovery of new properties and potential uses have been synthesized via different methods. Among these methods, hydrothermal approach [4,5] has great advantages in synthesizing metal oxide crystals through relative low temperature and simple equipment, which makes the method more suitable and economic for large-scale production.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Nickel Oxide by Hydrothermal Route for Gas Sensing Applications

Ahire¹,

Patil²,

Kajale

et al. 2013

Sensing Technology: Current Status and Future Trends I

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A hydrothermal process was used for the synthesis of nanostructured Nickel Oxide (NiO) with and without capping reagent (surfactant). Nickel Chloride (NiCl 2 ) a precursor of Nickel and Thioglycerol, a capping reagent, was used for this preparation. The structure, morphology and crystalline phase of the nickel oxide nanocrystal have been investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). TEM images showed that the nickel oxide nanoparticles have hexagonal structure with uniform size distribution around 20-38 nm for NiO with capping agent and 23-100 nm for NiO without capping agent. Phase pure, cubic nickel oxide formation was identified from the XRD data. The thick films of NiO were prepared by screen-printing technique to study their gas sensing properties. The gas sensing performance of NiO thick films (with and without surfactant) were tested to H 2 S, LPG, H 2 , NH 3 , Ethanol, CO, CO 2 , and O 2 , to operating temperature ranging from 100 to 450°C, they showed maximum response to H 2 S for 10 ppm gas concentration at 150°C. The response and recovery values upon the exposures to 10 ppm H 2 S gas and air were 4 and 58 s for NiO (with surfactant) thick film sensor, while those were 10 and 64 s for NiO (without surfactant) thick film sensor respectively. The NiO thick films have potential applications in H 2 S gas sensor applications. The results are discussed and presented in this paper.

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“…The ammonothermal method itself can be regarded as an analogue of hydrothermal method, commonly used in production of tens tons of quartz per year [6]. The scheme of the crystal growth process in the ammonothermal method is the following: GaN containing feedstock is dissolved in one zone of the high pressure autoclave, then transported by convection in the temperature gradient to the second zone, where GaN is crystallized on native seeds due to the supersaturation of solution.…”

mentioning

confidence: 99%

Properties of truly bulk GaN monocrystals grown by ammonothermal method

Dwiliński

Doradziński

Garczyński

et al. 2009

Phys. Status Solidi (c)

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We are presenting some physical and chemical basis of ammonothermal method of bulk gallium nitride synthesis in ammonobasic route. Excellent structural and wide spectrum of electrical parameters of truly bulk GaN crystals obtained in this way are revealed. In considered crystals a low dislocation density (5 × 103 cm–2) is attainable. At the same time the crystal lattice is extremely flat and the (0002) rocking curve is very narrow (FWHM=16 arcsec). Both polar and nonpolar ammonothermal GaN substrates enabled to grow high optical quality, strain‐free homoepitaxial layers. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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History of Hydrothermal Technology

Cited by 188 publications

References 23 publications

Kinetics of the crystallisation of Ni–Zn ferrite powders prepared by the hydrothermal method

Kinetics of the crystallisation of Ni–Zn ferrite powders prepared by the hydrothermal method

Nanostructured Nickel Oxide by Hydrothermal Route for Gas Sensing Applications

Properties of truly bulk GaN monocrystals grown by ammonothermal method

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