Sintering trials were carried out in a laboratory sintering pot designed as a tube with a circular diameter of 100 mm and height of 250 mm while the height and diameter of the green sintering mixture column were 200 and 80 mm, respectively. Magnetite fines were used in the form of an annular layer for the sidewall insulation.
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Vacuum Sintering of Quartz Powder and Phase Transformation of Quartz Y. MORIYA Matsuda Research Laboratory, Tokyo Shibaura Electric Co., Ltd., Kawasaki, Japan The process of the phase transformation of quartz to silica glass in the range of heating time 10-120 min at the pressure of 10-5 Torr is as follows At the heating temperature below about 1700 Quartz silica glass--->-cristobalite; At the
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phase by a heat treatment in a quartz tube furnace. Under a dry ﬂowing gas, containing a partial oxygen pressure of 200 ppm mixed with N 2, the temperature was increased from room temperature to 815 C at a rate of 10 Cmin−1 where the sintering was conducted. After 150 min the temperature was decreased to 400 Catarateof3 Cmin−1. During this
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tion (isothermal oxidation-sintering) experiments utilizing a tubular furnace with an alumina tube inside. Detailed description of the experimental setup and schematic diagram showing the furnace assembly are given elsewhere.14) The induration experiments were started by heating the furnace to a predetermined temperature (800, 1 000, and 1 250°C).
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in feed rod density were obtained by increasing the sintering temperature of feed rods to 1550 1C for 12 h under a static argon atmosphere using a vacuum furnace. Crystal growth experiments in oxygen-containing atmospheres (regardless of the growth rate and gas pressure applied) were found to lead to a signiﬁcant evaporation from the feed rod.
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ZnCoNC catalysts were obtained by sintering the ZIF-ZnCo powder to 900°C in a quartz tube furnace under N2 at a heating rate of 5°C min-1 and keeping at this temperature for 2 h. Preparation of IL-modified ZnCoNC catalysts [BMIM][NTf2] was diluted with IPA to make solutions with concentrations of 10, 1, 0.1, and 0.01 mg mL-1. The IL solutions
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