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Synthesis of Aluminum Titanate Powder at Low Temperature via Nonhydrolytic Sol-gel Method by Using Aluminum Powder

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Synthesis of Aluminum Titanate Powder at Low Temperature via...

Effect of Gelation Process on Preparation of Aluminum Titanate Ultrafine Powder by Hydrolytic Sol-gel Method

中国材料大会2012

作者： weihui jiang Zhifang Xu Jianmin Liu Qingxia Zhu Quan Zhang School of Material Science and Engineering Jingdezhen Ceramic Institute jiangxi Key Laboratory of Advanced Ceramic Materials

ISBN: (纸本)9783037856079;3037856076

Aluminum titanate （Al2TiO5 ） powder has been synthesized at low temperature via nonhydrolytic sol-gel method by using aluminum powder as aluminum source, titanium tetrachloride as titanium source, anhydrous ethanol as oxygen donor with different catalysts. The phase transformation of aluminum titanate xerogel powder during heat treatment and the influence of the mixing orders of raw materials, catalyst kinds on the synthesis of aluminum titanate were investigated by means of differential-thermal analysis （DTA-TG）, X-ray diffraction （XRD）, transmission electron microscope （TEM）. The results indicated that aluminum titanate powder was easily synthesized at 750 ℃ by using AlCl3 as catalyst with a mixing order of adding TiCl4 before AlCl3 into aluminum alcohol mixture. The catalytic order of the different catalysts in the preparation process of aluminum titanate is: FeCl3 ＞ AlCl3 ＞ MgCl2 . The catalyst promoted the activation of metal aluminum powder and played a major role in the synthesis of aluminum titanate powder at low temperature via nonhydrolytic sol-gel method.

关键词： Aluminum powder Catalyst Nonhydrolytic sol-gel method Aluminum titanate powder.

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Effect of Gelation Process on Preparation of Aluminum Titana...

Preparation of ZrSiO4/C Inclusion Pigments by Nonhydrolytic Sol-gel Methed Combined with the Process of Carbon Black Modification

中国材料大会2012

作者： weihui jiang Quan Zhang Jianmin Liu Qingxia Zhu Lifeng Miao School of Material Science and Engineering Jingdezhen Ceramic Institute jiangxi Provincial Key Laboratory of Advanced Ceramic Materials

ISBN: (纸本)9783037856079

Aluminium titanate （AT） ultrafine powder was prepared via hydrolytic sol-gel （HSG） method using aluminium nitrate （Al（NO3）3·9H2O） and titanium tetrachloride （TiCl4 ） as precursors as well as ethanol as solvent. Water required for hydrolysis reaction was supplied by the crystal water of aluminium nitrate itself. The effect of gelation processes, i.e. reflux and solvothermal treatment, on synthesis of AT powder was investigated by means of DTA-TG, XRD, SEM, and TEM, etc. The result shows that the gelation process has significant effect on the synthesis of AT powder. By reflux process, AT powder was synthesized at 1350 ℃ with average particle size above 1μm and serious agglomeration. Through solvothermal treatment process, however, AT powder with average particle size less than 150 nm was prepared at 1050 ℃ at a relatively high synthesis rate, which is due to the refinement reactants by the solvothermal treatment.

关键词： Aluminum titanate Ultrafine powder Hydrolytic sol-gel process Gelation Process.

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Preparation of ZrSiO4/C Inclusion Pigments by Nonhydrolytic ...

MgO/Al_2O_3比对MgO-Al_2O_3-SiO_2系统玻璃分相与析晶的影响

中国材料大会2012

作者： weihui jiang Yong Feng Jianmin Liu Qingxia Zhu Xiayi Xu School of Material Science and Engineering Jingdezhen Ceramic Institute jiangxi Key Laboratory of Advanced Ceramic Materials

ISBN: (纸本)9783037856079

Inclusion pigments of ZrSiO4 /C were prepared by nonhydrolytic sol-gel （NHSG） method combined with the process of carbon black modification. The crystalline phases, microstructure, functional groups on the surface of carbon black and chromatic value of the pigments were characterized by XRD, TEM, FTIR and Colorimeter, respectively. The surface structural changes of the carbon black modified by nitric acid and the influences of process parameters on the chromatic value of the pigments were also investigated. The results show that the process of carbon black modification enhances the affinity and binding force between carbon black and ZrCl4 sol, which contributes to improve the effect of carbon black wrapped by ZrSiO4 . The ZrSiO4/C inclusion pigment were obtained after calcining at 1000 ℃ for 8 h, and the L*, a* and b* value is 53.88, 0.74, and 1.88, respectively.

关键词： Nonhydrolytic sol-gel method The process of carbon black modification Zirconium silicate Carbon black Inclusion pigment.

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材料导报 2018年第24期32卷 4253-4257页

作者：包镇红江伟辉苗立锋罗薇景德镇陶瓷大学国家日用及建筑陶瓷工程技术研究中心景德镇333001

采用高温熔融法制备了具有不同MgO/Al_2O_3比的堇青石微晶玻璃。采用差热分析仪(DTA)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)等测试技术研究了MgO/Al_2O_3比对该系统玻璃分相和析晶的影响。结果表明:当SiO_2含量不变时,随着MgO/Al_2O_... 详细信息

采用高温熔融法制备了具有不同MgO/Al_2O_3比的堇青石微晶玻璃。采用差热分析仪(DTA)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)等测试技术研究了MgO/Al_2O_3比对该系统玻璃分相和析晶的影响。结果表明:当SiO_2含量不变时,随着MgO/Al_2O_3比的减小,分相形貌由连通的蠕虫状逐渐变为孤立的球形结构,且分相粒子尺寸逐渐减小,从200～300nm减小至30～50nm。当MgO/Al_2O_3比从3降到1,析晶峰温度由997℃升至1 105℃,析晶的难度逐渐提高。当MgO/Al_2O_3比为3时,MgO-Al_2O_3-SiO_2系统玻璃经950℃热处理后即产生大量分相,经1 050℃热处理后在分相液滴中析出大量堇青石晶体,且堇青石优先在富Mg相中析出。提高MgO/Al_2O_3比有利于MgO-Al_2O_3-SiO_2系统玻璃在分相中析晶,反之,则会降低系统的分相和析晶能力。

关键词：镁铝比分相析晶堇青石

FeCrAl合金表面高温抗氧化陶瓷涂层的制备

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硅酸盐学报 2005年第9期33卷 1089-1093页

作者：周健儿李家科江伟辉华南理工大学材料科学与工程学院广州510641 景德镇陶瓷学院材料科学与工程学院江西景德镇333001

用粘结料与Cr2O3制成料浆,用喷涂涂覆于FeCrAl合金表面,在空气中1 300℃熔烧制备了耐高温(1 200℃)抗氧化陶瓷涂层。用扫描电子显微镜,电子探针显微分析仪,X射线衍射仪,热膨胀仪等测试手段对涂层以及涂层与基体界面处进行表征。探讨了... 详细信息

用粘结料与Cr2O3制成料浆,用喷涂涂覆于FeCrAl合金表面,在空气中1 300℃熔烧制备了耐高温(1 200℃)抗氧化陶瓷涂层。用扫描电子显微镜,电子探针显微分析仪,X射线衍射仪,热膨胀仪等测试手段对涂层以及涂层与基体界面处进行表征。探讨了陶瓷涂层样品高温抗氧化性能的机理,获得了具有良好高温抗氧化性能的陶瓷涂层配方,其粘结料与Cr2O3的质量比为1∶0.5。结果表明:在空气中1 200℃,360 h抗氧化实验后,这种涂层样品的氧化质量增加约为基体合金的1/22。揭示了涂层高温抗氧化性能与涂层的组成、显微结构之间的关系。

关键词：铁铬铝合金陶瓷涂层高温抗氧化组成显微结构

亚运会与城市次区域发展——亚运会背景下广州市荔湾区发展策略

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规划师 2010年第12期26卷 11-15页

作者：江伟辉邵骏广州市荔湾区规划局中山大学地理科学与规划学院

广州亚运会已成为促进城市快速发展的战略工具,荔湾区是广州市核心城区之一,亚运会的举办为这一城市次区域带来了巨大的发展契机。"五区一街"城市更新规划以激活老城区历史文化保护及提升旧城区宜居环境为目标,采取文化休闲荔湾、商埠... 详细信息

广州亚运会已成为促进城市快速发展的战略工具,荔湾区是广州市核心城区之一,亚运会的举办为这一城市次区域带来了巨大的发展契机。"五区一街"城市更新规划以激活老城区历史文化保护及提升旧城区宜居环境为目标,采取文化休闲荔湾、商埠荔湾、生态荔湾等发展策略,通过平衡保护与开发间的矛盾,保护和传承城市文化,为后亚运时期的城市次区域发展及"广佛同城"提供足够的发展空间。

关键词：亚运会城市次区域历史文化资源保护与开发发展策略荔湾区

Research Progress of Magnesium Stabilized Aluminum Titanate and New Application of It in Pigment

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Journal of Modern Physics 2020年第11期11卷 1874-1890页

作者： Junhua Chen Li Yin Guo Feng Feng jiang Qianqian Zhao Shanfang Lan Mengting Liu Feifei Zhong Zuzhi Huang Jianmin Liu Qing Hu weihui jiang Department of Material Science and Engineering Jingdezhen Ceramic Institute Jingdezhen China National Engineering Research Center for Domestic & Building Ceramics Jingdezhen Ceramic Institute Jingdezhen China School of Chemical Engineering and Technology China University of Mining and Technology Xuzhou China

Aluminum titanate has been widely used in low expansion applications and its thermal stability has been a hot topic. The stability of aluminium titanate research for improving product quality, and expanding its application field is of great significance. Aluminum titanate as glass melt erosion resistance and high temperature resistant, can be applied to high temperature pigment base. The medium temperature stability of aluminum titanate can be improved by ion doping, and magnesium stability of aluminum titanate has been widely studied. Therefore aluminium titanate is expected to become an ideal high temperature ceramic base material. In this paper, the preparation technology of magnesium-stabilized aluminum titanate powder was reviewed, and the preparation of magnesium-stabilized aluminum titanate powder by non-hydrolyzed sol-gel was mainly introduced.

关键词： Aluminum Titanate Magnesium Stabilization Preparation Methods Progress Heterogeneous Condensation Non-Hydrolyzed Sol-Gel Method

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多孔片状镁铝尖晶石的制备

硅酸盐学报 2023年第1期51卷 163-170页

作者：吴倩冯果王三海江峰苗立锋江伟辉国家日用及建筑陶瓷工程技术研究中心江西景德镇333001 景德镇陶瓷大学材料科学与工程学院江西景德镇333403

在催化剂载体和吸附等领域,具有介孔结构的片状镁铝尖晶石因比表面积大、活性位点丰富、不易团聚等特性,受到越来越多的关注。以铝丝为铝源、镁粉为镁源、无水乙醇为溶剂,Na_(2)MoO_(4)为熔盐,采用熔盐辅助非水解溶胶-凝胶法制备多孔片... 详细信息

在催化剂载体和吸附等领域,具有介孔结构的片状镁铝尖晶石因比表面积大、活性位点丰富、不易团聚等特性,受到越来越多的关注。以铝丝为铝源、镁粉为镁源、无水乙醇为溶剂,Na_(2)MoO_(4)为熔盐,采用熔盐辅助非水解溶胶-凝胶法制备多孔片状镁铝尖晶石。借助X射线衍射仪、场发射扫描电子显微镜等测试手段研究了热处理温度及保温时间对镁铝尖晶石合成与形貌的影响,运用透射电子显微镜(TEM)观察片状晶体的微观结构,采用氮气吸附脱附测试对样品的比表面积和孔径进行了表征。结果表明:热处理温度和保温时间均对镁铝尖晶石形貌有较大影响。优选热处理温度为900℃,保温时间为8 h,可制备出具有介孔结构的片状镁铝尖晶石,片的长度为140~160 nm。所制得样品的比表面积为76 m^(2)/g。TEM和氮气吸附脱附曲线测试结果表明,样品存在明显的介孔结构。为制备多孔片状镁铝尖晶石提供了一种新思路。

关键词：镁铝尖晶石介孔熔盐法非水解溶胶-凝胶法

离子液体辅助微波法水相合成Cu-In-Zn-S/ZnS量子点及其在白光LED中的应用

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无机材料学报 2020年第4期35卷 439-446页

作者：陈婷徐彦乔江伟辉谢志翔王连军江莞景德镇陶瓷大学材料科学与工程学院景德镇333001 国家日用及建筑陶瓷工程中心景德镇333001 东华大学材料科学与工程学院功能材料研究所上海201620

Cu-In-Zn-S(CIZS)量子点具有毒性低、发射谱覆盖范围广、Stokes位移大等特点,在照明领域具有广阔的应用前景。通过离子液体辅助微波法水相合成CIZS量子点,系统研究了反应时间、配体添加量和前驱体溶液pH对样品的物相组成、显微形貌以及... 详细信息

Cu-In-Zn-S(CIZS)量子点具有毒性低、发射谱覆盖范围广、Stokes位移大等特点,在照明领域具有广阔的应用前景。通过离子液体辅助微波法水相合成CIZS量子点,系统研究了反应时间、配体添加量和前驱体溶液pH对样品的物相组成、显微形貌以及荧光性能的影响。结果表明,与未添加离子液体制备的样品相比,离子液体的引入提高了反应速率,可有效地将反应时间由180min缩短至30min;随着反应时间的延长,量子点的粒径增大,其发射峰位由609.2nm红移至634.6nm。随着nGSH(谷胱甘肽)/n(CuInZn)的增大,量子点的粒径逐渐增大,导致其发射峰位由622.6 nm红移至631.6 nm,同时量子点的发光强度逐渐增强;当该比值为15时,量子点的荧光强度最高。此外,随着pH的增大,去质子化的–SH和–NH2与量子点的作用逐渐增强,有效地钝化了量子点的表面态,使其荧光强度逐渐上升,当pH为8.5时,样品的荧光性能最佳,同时量子点的平均水合粒径由99nm增大至241nm;量子点溶液的Zeta电位为–27.7~–41.1mV,说明量子点溶液具有优异的稳定性。通过ZnS表面修饰可有效提高量子点的荧光强度。将CIZS/ZnS量子点与蓝光芯片结合,获得了显色指数为85.6、发光效率为34.8 lm/W的白光LED器件,为水相制备的多元量子点在白光LED中的应用提供了参考。

关键词：离子液体微波水相合成 Cu-In-Zn-S 量子点