共查询到17条相似文献,搜索用时 46 毫秒
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简单介绍了硫酸法生产金红石钛白的工艺流程,重点介绍了金红石钛白后处理的重要意义及后处理生产技术要点,提出了质量评价方法。 相似文献
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介绍了钛白粉基料的后处理工艺,以及目前国内处理工艺中的一些缺陷,并与国内外的钛白粉后处理工艺进行对比研究。然后针对国内工业生产的情况,提出了对处理工艺的改进方法,并展望了钛白粉后处理工艺的发展方向以及需要研究的重点。 相似文献
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通过系统试验,用筛选出的最佳晶型转化剂直接加入到硫酸氧钛水解的产物中,在最佳工艺条件下,经过煅烧和处理后,可生产出金红石型钛白粉。该工艺可为传统硫酸法制取钛白粉技术改革提供重要依据。 相似文献
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本文提出了测定钛白粉和金红石中二氧化钛的简易置换配位滴定法,向含有钛离子和其它阳离子的溶液中加入过量的环己烷二胺四乙酸(DCTA),以二甲酚橙(XO)为指示剂,用乙酸锌标准溶液返滴定过量的DCTA,然后以氟化物分解Ti(IV)-DCTA配合物,释放出的DCTA,用乙酸锌标准溶液滴定,本法终点变化敏锐,具有很好的精密度和准确度。 相似文献
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Leigh R. Sheppard Marta Bello Lamo John Holik Kirsty J. Mayfield David R. Nelson 《Journal of the American Ceramic Society》2013,96(2):407-411
195Pt solute diffusion coefficients in undoped single‐crystal rutile TiO2 have been determined parallel to the c‐axis over the temperature range of 1073–1523 K and oxygen partial pressure of 101 kPa. This has yielded the following temperature dependence: On the basis of this result, it has been concluded that 195Pt diffuses via an interstitial mechanism involving rapid transport parallel to the c‐axis through open interstitial diffusion channels. While other divalent cations have also displayed diffusion via the same mechanism, and report diffusion rates that greatly exceed that for cation self‐diffusion, the overall rate of 195Pt diffusion is slow. This has been attributed to the size of Pt2+ (0.80 Å) which is comparative to the dimension of interstitial channels (0.77 Å) through which transport is believed to be taking place. 相似文献
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Rutile titanium dioxide (TiO2) white pigment is prepared by a novel NaOH molten‐salt process. Titanium slag is decomposited by NaOH molten salt to obtain sodium titanate which is then converted into hydrate titanium dioxide (H2TiO3) through acid dissolution and hydrolysis. Finally, TiO2 white pigment is prepared by H2TiO3 doping and calcinations. H2TiO3 prepared by this innovative method is characterized and the influencing factors of doping and calcination of H2TiO3 on pigmentary properties of TiO2 are investigated. H2TiO3 with certain characteristics could be prepared through the controlled hydrolysis step in the NaOH molten‐salt process. Good pigmentary properties of rutile TiO2 white pigment are achieved by doping with suitable amounts of K2O, P2O5, Al2O3, and rutile nuclei, thereby approaching the quality of the commercial TiO2 pigment standards. 相似文献
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<正> 金红石型涂料钛白粉(TiO_2)是一种极为优越的白色颜料,它具有遮盖率强、着色率高、颗粒微细及抗粉化、耐黄变等性能,是制备各种高档白漆及浅色漆不可缺少的白色颜料。近年来,对涂料用金红石型钛白粉的需要量增长很快,目前国内仅少数厂生产,年产量为500~1000吨,远远满足不了国民经济发展的需要。采用的工艺路线,大都用并流法晶种。但该方法由于烧结而不易破碎的颗粒,需采用设备条件要求较高的气流粉碎工艺,这对小型工厂生产带来一定的困难。 相似文献