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 Posted: Mon 9:03, 29 Nov 2010 Post subject: mac cosmetics wholesale Chemical precipitation tec |
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Chemical precipitation technique for preparing CaTiO3 powder
Level CaTiO, study prepared for the equipment: a large X diffractometer (PW a 1700Cw) and transmission electron microscopy marrow (TEM a 20OCX) 2 experiment will 247.3ml30HO43.4m125% ammonia surgery and 2g. Miss H: TiO,[link widoczny dla zalogowanych], 1000ml beaker placed in an ice bath under the conditions of anti-Sharp potato loaded 8 'Functional Materials \Figure la,[link widoczny dla zalogowanych], b, c, d is the 400C × 2h, 400 ℃ × 6h +550 ℃ × 2h, 650 ℃ × 2h of TEMJ people l film. According to the statistics of its size photo electric dragonfly spirit shown in Table 1. Table lT ugly at different temperatures in different boats Gloydius burning burning under the same conditions when the average grain Yu TablelAverageDiameterofCaTiO3inDifferentS [nteringTemperatureandTime calcination temperature and calcination with the level aphid size 400 ℃ × 2h10rim the following 400 ℃ × 6h10rim350 ℃ × 2h15am650 ℃ × 2h50nm400 ℃ × 2h.550 ℃ × 2h.6, 50 ℃ × 2h followed by significantly increased size, Kei 650 ℃ × 2h in the size of about 550 ℃ × 2h 3 times, and 550 ℃ × 2h particle size is 400C × 2h 2 calcination temperature on the whip times we can see the average size of particles have a very significant impact, at the same time, the temperature increases, the particle size was growing up, the higher the temperature. | Ming particle size ship CaTi0a grow faster in speed 400 ℃ × 6h cut the throat burning from the particle size when compared with 400 ℃ × 2h in the spring large. It can be seen in the same calcination temperature, calcination time, the longer the particle size will increase, the impact of a banner degree indigo calcination temperature was this paper HTjo; for the thorium source, because of its high chemical activity and easily with H: 0, NHa react. Che found by comparative tests. the main red dolmen o. not with Hjoz, NH reaction, only with 429TiCI. hydrolyzed solution of anatase in the Tio. only with H. o, NH, reaction, but the response time is H. Tio more than 5 times. Hzo not the same as pH reaction with different T Th matter of Taiwan. in neutral and alkaline conditions can be generated titanium peroxide mouth of Taiwan]. so cars can approach the following equation for the reaction process; H} Tio3 + H2O2 + NH3 A (NH ') TO. (NH ') 2Tio. + Ca (NO3) 2 A-CaTio.CaTiO.-CaTiOa + O2 determined experimentally by comparing the H1, o,[link widoczny dla zalogowanych],, H2O:, NH Mount Fig2Table Seoul the best ratio of 1:8:2. Hydrogen Peroxide and the little amount of ammonia. HT (): poorly soluble; hydrogen peroxide and ammonia content too much. is unnecessary waste. t in the size of the particles in precipitation mainly by the nucleation rate and growth rate of the first set of nuclear because the latter than the former more susceptible to temperature so the car port t response selection carried out in ice bath. In addition. accompanied by the deposits formed on gas generation, the generation of these bubbles the solution to some extent prevent the growth of edge, This is also the arrows in this way to prepare nano CaT | 0 one of the factors. ■ '■ aIO0 ℃ × 2hb4OO ℃ × 6h ■ ■ Figure 2 shows the X-ray nano-CaTiO3 map, it is compared with CaTiO the PDF card, complete peak consistent. no impure peaks appear. note prepared by the arrow 430 nano CaTiOs and standards samples. nm CaTiO the amount of impurities shown in Table 2 old. 4 Conclusion 4.1 to H2TiO3, H2O2, NH3, Ca (NO,)} is raw material powder can be successfully prepared caO. controlled experimental conditions arrows, can be nano-powder. 4.2 with different calcination temperature and calcination time on the sample treatment can get the corresponding nano-size belly. References 1 Rent-yung. Lei Ying project. Chemistry World, l992.33 (2); 49 ~ 542ForGR, AdairJHeta1.JournalMaterSei.1990, 25 (6) 3643 ~ 36483 State Zhong Qi body of Scientology,[link widoczny dla zalogowanych], Beijing; Higher Education Publishing Mu, 1989,13 ~ 48C function material) 1996,[link widoczny dla zalogowanych],27 (5)
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