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Boehmite structure of the proposed evolution


quot; C (air) into a Ab03 【7; proposed boehmite 300 \hydrothermal conditions, into a boehmite [. The results of this study: SB, SA intends to boehmite at 300 \The products were x-ray diffraction (JCPDS21-1307 data),[link widoczny dla zalogowanych], TG-DTA, IR spectroscopy confirmed that neither 7 a AkO3, nor is it a boehmite, but the layer structure containing water, a higher degree of order NG Quasi boehmite. NG Quasi boehmite dehydration endothermic Valley, 470 ℃, over a stone aluminum heat-absorbing water Dun valley low 60 ℃. Structure of the table of Cong,[link widoczny dla zalogowanych], to a certain temperature range. Boehmite on the proposed \Pressure cook it with the Preparation of boiled grain size> 90 × 10 ~ nrn quasi boehmite. 222 layer structure of water in summer heat-absorbing effect of its evolution,[link widoczny dla zalogowanych], according to TG-DTA experiment, the [A1OoH]-nI-IzO layer structure of water from l3.61% ~ 1.15% of the endothermic effect of the evolution. Multi-layer structure of water,[link widoczny dla zalogowanych], at least by the boehmite structure to be ordering one of the signs increased. Figure 6 shows. Layer structure with water to reduce the range of 400 ~ 500 ℃. Endothermic effect of the non-bee to a peak by the weak enhancement. Endothermic and the temperature was gradually increased bee's evolution. Figure 6 l, 7,8,9 are nascent, SB, SA,[link widoczny dla zalogowanych], NG to be thin type 2 JiangYa 2001 Length: boehmite structure of the proposed evolution of the water 13 to be boehmite alumina Stone has a strong absorption characteristics of moisture in the air. Even if the proposed boehmite calcined at 300 ℃ for 50 hours. TG-DTA analysis further, in the <100 ℃, 8% of the weight loss will be. This will occur in the proposed water boehmite into adsorbed water, interlayer structure of water, crystal water. x100 ℃ ring 6 to be boehmite layer structure of the water with the amount and degree of dehydration Ju evolution DTA1-10 - intended to boehmite;】 1 - a 2.3-hydroxy boehmite is the vibration characteristics of infrared spectra In the infrared radiation, gave rise to the molecular vibrational levels of the transitions in an absorption spectrum produced, due to absorption of the characteristic frequency depends on the chemical composition and internal structure, the garden and each mineral has its own absorption spectrum. As a result of a layered structure, the different layers of water to be boehmite as an evolutionary series, which is amorphous to a crystalline, hydroxyl order from disorder to order of evolution. Boehmite to be the evolution of the infrared spectrum (Fig. 7) proved the concept. Therefore, the proposed structure of boehmite expression written as [AIOOH]-n0, n is typically 0.080 - 0.602. n value is the cause structural evolution of the foundation, but also confers the characteristics of industrial products. Boehmite structure of the proposed evolution of the infrared absorption spectroscopy has demonstrated its evolution. Lattice vibration absorption peak area values [A1OOH] the same, only the solid slightly different degree of ordering, the peak intensity vary. Aging is not intended to boehmite, boehmite aging proposed, SB Quasi boehmite, NG Quasi boehmite, a boehmite infrared spectrum compared to the amount of water layer structure led to ask the essence of the evolutionary process, a strong broad hydroxyl vibration absorption band of 3900 - 2600cmI1 is [OOH]-n} O characteristics of the evolution of areas. Yi stick. ∞ prince Yu 7 boehmite structure intended to play his infrared spectra of a ~ l is not intended to boehmite aging; 2 - aging to be boehmite; 3 - SB to be boehmite; 4 - NG to be boehmite; 5 - a boehmite in the wave number of 3400cm ~, 3093em at the two absorption peaks of hydroxyl groups show a regular change, it is from weak to strong and sharp absorption peak clamp. With the reduction in the number of interlayer water. 3400crn. . , 3093cmI1 symmetry of the two peaks increases. Indeed, the structure of water between layers of water molecules are not free state, but by strong hydrogen bonding. Hydroxyl number, nature, etc. are to be studied. The existence of layer structure and quantity of water is caused by [A1OOH]-nO flat layer along the c-axis direction is the essence of movement. This is intended to boehmite production process control, different types of boehmite to be the preparation, the proposed boehmite research on characteristics provided. NG-type [A1OOH] ・ nH20 products are of high crystallinity,

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