The invention provides a preparation method of undoped spherical and tetragonal nano-zirconia powder, which belongs to the field of nano-material preparation. Its characteristics are as follows: using lyotropic liquid crystal template method, the ratio of three components in SDS/C10H21OH/H2O system is determined, and the undoped spherical and tetragonal nano-zirconia powder is prepared by adjusting the molar ratio of citric acid and zirconium nitrate mixture. The steps are as follows: To determine the ratio of SDS/C10H21OH/H2O system. Different molar ratios of citric acid and zirconium nitrate were used to replace the component water in SDS/C10H21OH/H2O system. After mixing, the product was dried at 50 80 C for 2 24 hours and then calcined at 500 800 C. The undoped spherical and tetragonal nano-zirconia powders were obtained. The beneficial effect of the invention is that the undoped spherical and tetragonal nano-zirconia powders are prepared by adjusting the molar ratio of citric acid to zirconium oxynitrate by the lyotropic liquid crystal template method. The preparation method is simple, the preparation conditions are mild, and the prepared powders are not easy to agglomerate in the subsequent treatment.
【技术实现步骤摘要】
球形、四方相纳米氧化锆粉体的制备方法
本专利技术提供一种未掺杂球形,四方相纳米氧化锆粉体的制备方法,尤其涉及液晶模板法通过控制柠檬酸与硝酸氧锆的摩尔比,制备未掺杂球形、四方相纳米氧化锆制备方法,属于纳米材料制备的领域。背景研究纳米二氧化锆因其具有化学稳定性高、抗蚀性能强、高温导电性等优良性能,广泛应用电子陶瓷、功能陶瓷等领域。其性能受其结构影响,很大程度上取决于晶型,一般情况下氧化锆存在四种稳定的同素异晶体,主要包括:无定形、单斜相、四方晶相及立方晶相(ZhigachevA.O.,UmrikhinA.V.,GolovinY.I.,etal.PreparationofNanocrystallineCalcia-StabilizedTetragonalZirconiabyHigh-EnergyMillingofBaddeleyite[J].InternationalJournalofAppliedCeramicTechnology,2015,12:82-89),在室温下,纯氧化锆粉体不能稳定保持立方相及四方相,只能以单斜相存在,而稳定的四方相氧化锆具有极好的断裂韧性和强度对于陶瓷材料是一种重要的结构。由于氧化锆从单斜相到四方相转变,存在着7%~9%的体积变化,故未加稳定化处理的氧化锆就不能制备耐高温陶瓷材料。同时氧化锆的性质与其自身形貌有很大联系,球形粉体可使制备的陶瓷材料的密度增大。因此控制粉体的形貌对制备优质的陶瓷材料具有非常的意义。鉴于氧化锆晶型及形貌在陶瓷领域的重要性,许多学者将控制特定形貌及常温下稳定的四方氧化锆作为研究的重点。从目前国内外对氧化 ...
【技术保护点】
1.一种未掺杂球形、四方相纳米氧化锆粉体的制备方法,确定SDS/C10H21OH/H2O模板配比,在此基础上将混合均匀不同摩尔比柠檬酸与硝酸氧锆混合液取代SDS/C10H21OH/H2O体系中的组分水,在水浴中静置恒温后,采用氨水调节溶液pH,恒温静置后获得目标产物前驱体,所获的产品经过高速离心机离心、洗涤、干燥,煅烧后即为所得纳米氧化锆粉体,其特征在于SDS/C10H21OH/H2O模板配比的质量比优选15/10/75。
【技术特征摘要】
1.一种未掺杂球形、四方相纳米氧化锆粉体的制备方法,确定SDS/C10H21OH/H2O模板配比,在此基础上将混合均匀不同摩尔比柠檬酸与硝酸氧锆混合液取代SDS/C10H21OH/H2O体系中的组分水,在水浴中静置恒温后,采用氨水调节溶液pH,恒温静置后获得目标产物前驱体,所获的产品经过高速离心机离心、洗涤、干燥,煅烧后即为所得纳米氧化锆粉体,其特征在于SDS/C10H21OH/H2O模板配比的质量比优选15/10/75。2.根据权利要求1所述的未掺杂球形、四方相纳米氧化锆粉体的制备方法,其特征在于:柠檬酸与硝酸氧锆摩尔比为1:1-5:1。3.根据权利要求1所述的未掺杂球形、四方相纳米氧化锆粉体的制备方法,其特征在于:氨水调节体系pH为8-...
【专利技术属性】
技术研发人员:何伟艳,赵小兵,刘进荣,
申请(专利权)人:内蒙古工业大学,
类型:发明
国别省市:内蒙古,15
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