以化学合成的ZrO2和WO3为原料,以固相法制备具有负热膨胀特性的超细立方相ZrW2O8粉体.对其前驱体进行差热分析(DSC),以X射线粉末衍射(XRD)、扫描电子显微镜(SEM)及透射电子显微镜(TEM)对产物结构及形貌进行表征.结果表明:通过化学方法合成出单斜相和四方相混合的纳米级ZrO2粉体,纯单斜相的纳米级WO3粉体,以其为原料能够制备出超细立方相ZrW2O8粉体.同时考察不同研磨时间对其粒径的影响.变温X射线粉末衍射分析表明:所得ZrW2O8粉体具有很好的负热膨胀特性,在20～600℃范围内的平均热膨胀系数为-6.82×10-6K-1.
参考文献
| [1] | RUSTUM ROY .Very low thermal expansion coefficient materials[J].Annual Review of Materials Science,1989,19:59-60. |
| [2] | Sleight AW. .Compounds that contract on heating[J].Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics,1998(12):2854-2860. |
| [3] | SLEIGHT A W.Negative thermal expansion materials[J].Synthesis React Solids,1998(03):128-131. |
| [4] | Yuko MORITO;Shaorong WANG;Yoshikazu OHSHIMA .Preparation of Dense Negative-Thermal-Expansion Oxide by Rapid Quenching of ZrW_2O_8 Melt[J].日本セラミックス协会学术论文志,2002(1282):544-548. |
| [5] | Seo DK.;Whangbo MH. .SYMMETRIC STRETCHING VIBRATIONS OF TWO-COORDINATE OXYGEN BRIDGES AS A CAUSE FOR NEGATIVE THERMAL EXPANSION IN ZRVXP2-XO7 AND AW(2)O(8) (A=ZR, HF) AT HIGH TEMPERATURE[J].International Journal of Quantum Chemistry,1997(1):160-163. |
| [6] | 李钢,姚杰,王克宇,周耀明,张宁.一种负热膨胀性材料的物相结构分析[J].南京师大学报（自然科学版）,2000(01):56-59. |
| [7] | 孔向阳,吴建生,曾振鹏.ZrW2O8微波合成、表征及负膨胀行为研究[J].硅酸盐学报,1999(03):265-269. |
| [8] | 沈容,王聪,王天民."负热膨胀"氧化物材料ZrW2O8的研究现状[J].无机材料学报,2002(06):1089-1094. |
| [9] | CHANG LLY;SCROGER MG;PHILIPS B .Condensed phase relations in the system ZrO2-WO2-WO3 and HfO2-WO2-WO3[J].Journal of the American Ceramic Society,1967,50(02):211-215. |
| [10] | WILKINSON A P;LIND C;PATTANAIK S.A new polymorph of ZrW2O8 prepared using non-hydrolytic sol-gel chemistry[J].Chemistry of Materials,1999(11):101-108. |
| [11] | Coral Lind;Angus P.Wilkinson .Seeding and the Non-Hydrolytic Sol-Gel Synthesis of ZrW_2O_8 and ZrMo_2O_8[J].Journal of Sol-Gel Science and Technology,2002(1):51-56. |
| [12] | Kowach GR. .Growth of single crystals of ZrW2O8[J].Journal of Crystal Growth,2000(1/2):167-172. |
| [13] | JUAN YANG;DAN LI .Effect of particle size of starting materials TiO2 on the morphology and properties of layered titanates[J].Materials Letters,2001,50:230-231. |
| [14] | 李月峰,赖琼钰.反胶束微乳液法合成纳米SrTiO3研究[J].无机化学学报,2005(06):915-918. |
| [15] | DONG C .Powder X:windows-95-based program for powder X-ray diffraction data procession[J].Journal of Applied Crystallography,1999,32:838-839. |
| [16] | 王零森;陶颖;张金生 等.乙酸络合法制取ZrO2超细粉[J].中南工业大学学报（自然科学版）,1998,5(29):458-460. |
| [17] | 沈容,王天民,白海龙,熊常健.共沉淀法合成负热膨胀材料ZrW2O8[J].材料工程,2003(03):3-6. |
| [18] | KOJI HASHIMOTO .Recent advances in the catalytic properties of metastable materials[J].Materials Science and Engineering,1997,A266-288:891-899. |
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