The synthesis of phosphonated hydrolytic polymaleic anhydride (PHPMA) and the evalution of its anticorrosion and antiscaling properties in treatment of cooling water system
Compound 3 exhibited the enchased texture of a smectic liquid crystal from 209.4°C to 219.5°C on heating, while 2 exhibited a liquid crystalline phase from 87.4 to 83.2°C on cooling.
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The model adopted two exponential equations to calculate the martensite fractions for cooling and heating, respectively.
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In this paper, the technical method of cooling quench medium with air-cooler in the process of bearing quenching is introduced.
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In the application of knife-edge technique, the temperature of atoms through laser cooling was measured.
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Results indicate that, after atoms are emitted from an atomic oven, the longer the atoms move, the worse the distribution of the atomic beam shows, regardless the laser cooling is taken or not.
The relation between the Stability of β-C_2S and. the burning temperature has been inveatigated by means of X-ray,polorized microscope and TDA.The experimental results show that β-C_2 is a metastable modification, which tends to invert into γ-C_2S during cooling. From the samples burned in different temperatures varying from 950℃ to 1400℃, the relative content of γ-C_2S increases with lowering temperature. Dusting occurs even from samples burned at temperature of 1200℃ for 6 hours, but there is no dus...
Twenty eight samples of lead oxide glaze, calcium oxide glaze and red glaze from Hanto Qing Dynasties were studied and their softening points were determined. It can beasserted that the "Qing Hua" (underglaze blue) not only coloured the surrounding glazebut also preferably stained the anorthite crystalline at the site to deep blue. On heatingthe "Qing Hua", redissolvation of the anorthite crystals caused slight diffusion of the bluecolour. After cooling, anorthite recrystallized and aggregated on the ...
The thermal expansion behaviour of cordierite based glass-ceramics containing TiO_2has been researched. In such glass-ceramics, there are a large amount of crystalline phaseand a little glass phase, wherein the cordierite is an essential phase. Besidesthere are also rutile and magnesium aluminium titanate solid solution. Since the crystalspossess anisotropic in nature of thermal expansion in cooling process during crystallizedtreatment, it would produce internal microcracks due to the action of therma...