学术
Ca0．6Mg0．4Zr4（PO4）6纳米粉体的共沉淀法合成与表征
许爱民[1,2] 周健儿[2] 张小珍[2] 胡学兵[2] 曾令可[1]
[1]华南理工大学材料科学与工程学院,广东广州510064 [2]景德镇陶瓷学院材料科学与工程学院,江西景德镇333001
摘 要:
采用直接共沉淀法，以等化学计量比的Ca（NO3）2·4H2O、Mg（NO3）2·6H2O、ZrO（NO3）2·8H2O和NH4H2PO4等无机盐为原料，控制共沉淀反应过程pH=9时，合成了单相的Ca0．6Mg0．4Zr4（PO4）6（C0．6M0．4ZP）纳米粉体，并采用TG-DSC、XRD、纳米粒度分析、SEM和TEM等分析测试手段对合成的Ca0．6Mg0.4Zr4（PO4）6（C0．6M0．4ZP）纳米粉体进行了测试表征。TG-DSC和XRD分析表明，沉淀物经900℃左右热处理即可获得单相的C0．6M0．4ZP纳米粉体。SEM和TEM分析表明，沉淀物在900℃煅烧3h，可获得颗粒粒径为30nm左右的C0．6M0．4ZP纳米粉体，粉体颗粒呈球形，但合成纳米粉体存在团聚现象，导致采用纳米粒度分析仪测定的纳米粉体颗粒尺寸主要分布在30～70nm之间，平均粒径达到45nm。合成C0．6M0．4ZP纳米粉体制备的干压试样，在1300℃保温3h烧成后相对密度达到95．3％，抗弯强度为125．7MPa。[著者文摘]
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文章出处:
《稀有金属材料与工程》-2007年36卷A01期 -28-31页
分 类 号:
文献标识码:
A
文章编号:
1002-185X（2007）S1-0028-04
Synthesis and Characterization of Ca0.6Mg0.4Zr4（PO4）6 Nanoparticles by Co-Precipitation
Xu Aiming, Zhou Jianer, Zhang Xiaozhen, Hu Xuebing, Zeng Lingke （1. College of Material Science and Engineering, South China University of Technology, Guangzhou 51064, China;2. School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China）
Abstract:
Co-precipitation method has been applied to synthesize nano Ca0.6Mg0.4Zr4（PO4）6 （C0.6M0.4ZP） powders. Single phase C0.6M0.4ZP can be obtained by reaction of stoichiometric mixture of Ca（NO3）2·4H2O, Mg（NO3）2·6H2O, ZrO（NO3）2·8H2O with NH4H2PO4 keeping pH=9. The as-synthesized product was characterized by thermogravimetric analysis and differential scanning calorimetry （TG-DSC）, X-ray diffraction （XRD）, Zetasizer, scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）. Results show that pure spherical C0.6M0.4ZP nanoparticles with a size of about 30 nm can be obtained after calcined at 900 ℃ for 3 h, but the synthesized powders are partially agglomerated, and the particle size determined by Zetasizer are mostly distributed between 30-70 nm, with an average particle size of 45 nm. The dry pressed samples prepared with the C0.6M0.4ZP nano powder can be sintered to a relative density of 95.3%, with flexural strength about 125.7 MPa.[著者文摘]
Key words:
co-precipitation; Ca0.6Mg0.4Zr4（PO4）6; nano powder; characterization; sintering properties
基金资助:
国家重大基础研究前期研究专项（2004CCA07500）;江西省火炬计划项目（20031C0200600）资助
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