Isolate
发表于 2025-3-28 16:39:01
Hydrothermal Reaction-Sintering of Monoclinic HfO2ring was observed above 900°C under 100 MPa for 3 h. Generally, both the bulk density and the crystallite size of the sintered bodies increased with increasing temperature. Bodies with the maximum relative density (0.98) were obtained by treatment above 1000°C.
撤退
发表于 2025-3-28 21:21:03
Hydrothermal Reaction Sintering of High Density Sintered Oxidesnd high pressure solutions at certain temperature, pressure and time..Grain size of sintered oxides is smaller than that of starting metal powders. Characteristics of hydrothermal reaction sintering oxides are as follows:
Campaign
发表于 2025-3-29 00:06:36
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insipid
发表于 2025-3-29 03:25:08
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obviate
发表于 2025-3-29 10:46:44
The Processing of a Permalloy-Magnetite Composite by Hydrothermal Reaction Sinteringure apparatus using Ar gas as the pressuring medium. The sintered composites thus produced were examined by X-ray diffraction, optical and scanning electron microscopy, and energy dispersive spectroscopy. The sintered composite of Fe-Ni alloy and iron oxide can be made by hydrothermal reaction sinte
hemoglobin
发表于 2025-3-29 13:44:38
Preparation of Zirconia Fine Powders by the Reactions Between Zirconium Metal and High Temperature—He capsule reacted above 250°C and yielded fine grained ZrO. powders. The powders were sole monoclinic modification having the average grain size of ≈2k nm. The use of Ca solutions instead of H.O led to a partiale formation of cubic zirconia fine grains, particularly in the case of Ca(NO.). with exce
ascetic
发表于 2025-3-29 16:31:58
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Palate
发表于 2025-3-29 21:08:29
Synthesis and Sintering of Zirconia Fine Powders by Hydrothermal Reactions from Zirconium Metal and gh-pressure water or solutions. Zr metal and water sealed in a Pt capsule reacted under 98 MPa above 250°C and produced monoclinic ZrO. fine grains having the average crystallite size of 24 nm. Further heating of this product up to 1000°C yielded a dense sintered body of m-ZrO. with the maximum rela
疏远天际
发表于 2025-3-30 00:57:27
Hydrothermal Oxidation of Hf Metal Chips in the Preparation of Monoclinic HfO2 Powdersmperature-pressure-time was examined in both closed and open systems. Hydrothermal oxidation of Hf proceeded through three stages: the surface oxidation of Hf metal chips with H.O, the reaction of the Hf with released H. to form hydrides, and the succeeding oxidation of the hydrides with H.O to form
Middle-Ear
发表于 2025-3-30 07:13:41
Reaction Kinetics in the Hydrothermal Oxidation of Hfm) were formed through two parallel reaction paths, one the oxidation of Hf with H.O and the other the consecutive reaction via formation of Hf hydride. Based on the experimental results at 500°C under 100 MPa, three reaction rate constants were determined for two kinds of starting materials. The re