APT煅烧工艺对WO<sub>2.72</sub>晶体生长机制的影响

摘要
图/表
参考文献
相关文章 (2)

全文: PDF (798 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要利用工业回转炉,在不同温度和保温时间下煅烧仲钨酸铵(APT)粉末制备WO_2.72粉末。结果表明,在煅烧温度高于800 ℃时可获得单相WO_2.72粉末。煅烧温度强烈影响WO_2.72晶粒的形貌和尺寸,随温度升高至大约770~800 ℃,其形貌由细长针状晶粒向短粗棒状晶粒转变。对于细长针状晶粒,随温度升高,其直径微量增大,长度急剧增大,生长机制为单晶晶粒形核,向APT颗粒内部生长,伴随有APT颗粒表面微量的WO_x·nH₂O气相沉积,然后还原长大;对于短粗棒状晶粒,随温度升高,结果相反,其生长机制是通过多个晶粒成束形核,共同向APT颗粒内部生长成棒状晶粒。随保温时间延长,WO_2.72棒晶的形貌无明显变化,其直径和长度微量增大。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	龙本夫
	林高安
	张太全
	沈思奇

关键词 ： APT, 工业回转炉, 煅烧, WO_2.72晶粒, 生长机制

Abstract：WO_2.72powder was prepared by calcining APT powder at various temperatures and holding time in an industrial rotary furnace. The results indicate that the single-phase WO_2.72 powder can be obtained above 800 ℃. The morphology and size of WO_2.72 grains are strongly affected by calcining temperature, and the morphology changes from long-needle-like to short coarse rod-like at about 770-800 ℃ with increasing temperature. For long needle-like grains, with increasing temperature, their diameters increase slightly, but their lengths increase sharply. The growth mechanism is that monocrystalline grains nucleate grow into APT particles, accompanying by a small amount of WO_x·nH₂O vapor deposition-re-reduction on the surface of APT particles. For short coarse rod-like grains, with increasing temperature, an opposite result is obtained. The growth mechanism is that the multiple grains clustery nucleate and grow into APT particles to form rod-like grains. With increasing holding time, there is no obvious change in the morphology of WO_2.72 grains, and their diameter and length increase slightly.

Key words： APT industrial rotary furnace calcining WO_2.72 grains growth mechanisms

收稿日期: 2020-11-16 出版日期: 2021-03-22

ZTFLH:	TG146.4⁺11
	TF123

基金资助:福建省中科院STS计划配套项目(2019T3001)

通讯作者: 张太全,高级工程师,博士。电话：0592-5766512;E-mail: zhang.taiquan@cxtc.com

引用本文:

龙本夫, 林高安, 张太全, 沈思奇. APT煅烧工艺对WO_2.72晶体生长机制的影响[J]. 粉末冶金材料科学与工程, 2021, 26(1): 32-39.
LONG Benfu, LIN Gaoan, ZHANG Taiquan, SHEN Siqi. Effect of calcining process of APT on growth mechanisms of WO_2.72crystals. Materials Science and Engineering of Powder Metallurgy, 2021, 26(1): 32-39.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2021/V26/I1/32

[1] 宋翰林, 姜平国, 刘文杰, 等. 氧化钨氢还原动力学的研究进展[J]. 有色金属科学与工程, 2017, 8(5): 64-69.
SONG Hanlin, JIANG Pingguo, LIU Wenjie, et al.Research progress on hydrogen reduction kinetics of tungsten oxide[J]. Nonferrous Metals Science and Engineering, 2017, 8(5): 64-69.
[2] ŞENOL Ç.Reduction behavior of nanocrystalline WO₃ powder in H₂ atmosphere[J]. Afyon Kocatepe University Journal of Science and Engineering, 2017, 17: 669-674.
[3] WU X W, LUO J S, LU B Z, et al.Crystal growth of tungsten during hydrogen reduction of tungsten oxide at high temperature[J]. Transactions of Nonferrous Metals Society of China, 2009, 19: s785-s789.
[4] 陈丽杰, 田磊, 徐志峰, 等. 不同氧含量的氧化钨粉对超细钨粉制备的影响[J]. 有色金属, 2018, 6: 61-66.
CHEN Lijie, TIAN Lei, XU Zhifeng, et al.Effect of tungsten oxide with different oxygen content on preparation of ultrafine tungsten powder[J]. Nonferrous Metals, 2018, 6: 61-66.
[5] WU C H.Ultrafine tungsten powders in-situ reduction nano- needle violet tungsten oxide[J]. International Journal of Refractory Metals and Hard Materials, 2011, 29(6): 686-691.
[6] WU C H, WU Q S, WEN X, et al. Preparation method of industrial purple nano-needle tungsten oxide: US, US2014/ 0014875[P].2014-01-16.
[7] 谢中华, 汪壮瀚, 余春荣, 等. 一种高纯均相针状紫钨粉末的制备方法: 中国, CN109622989A[P].2019-04-16.
XIE Zhonghua, WANG Zhuanghan, YU Chunrong, et al. Preparation method of high purity homogeneous acicular violet tungsten powder: China, CN109622989[P].2019-04-16.
[8] PFEIFER J, BADALJAN E, TEKULA-BUXBAUM P, et al.Growth and morphology of W₁₈O₄₉ crystals produced by microwave decomposition of ammonium paratungstate[J]. Journal of Crystal Growth, 1996, 169(4): 727-733.
[9] 黄继武, 李周. 多晶材料X射线衍射—实验原理, 方法与应用[M]. 北京: 冶金工业出版社, 2012.
HUANG Jiwu, LI Zhou.Polycrystalline Materials X-ray Diffraction Experimental Principle, Method and Application[M]. Beijing: Metallurgical Industry Press, 2012.
[10] 刘梅丽. 蓝色氧化钨中氨含量的测定[J]. 中国钨业, 1995, 6: 28-29.
LIU Meili.Determination of NH₃ content in blue tungsten oxide[J]. China Tungsten Industry, 1995, 6: 28-29.
[11] 苏玉蕾, 王少波, 宋刚祥, 等. 氨分解制氢催化剂研究进展[J]. 舰船科学技术, 2010, 32(4): 138-143.
SU Yulei, WANG Shaobo, SONG Gangxiang, et al.Development in catalysts for hydrogen production by ammonia decomposition[J]. Ship Science and Technology, 2010, 32(4): 138-143.
[12] HASHIMOTO H, TANAKA K, YODA E.Growth and evaporation of tungsten oxide crystals[J]. Journal of Physical Society of Japan, 1960, 15(6): 1006-1014.
[13] KUMAO A, FUJITA Y, ENDOH H.Growth of dendritic and needle tungsten oxide crystals studied by high-resolution electron microscopy[J]. Ultramicroscopy, 1994, 54(2/4): 201-206.
[14] 石玉斌. W₁₈O₄₉微纳米晶须/线的制备及其生长机理研究[D]. 长沙: 中南大学, 2012: 33-43.
SHI Yubin.Preparation and growth mechanism of W₁₈O₄₉ micro/nanosized whiskers/wires[D]. Changsha: Central South University, 2012: 33-43.
[15] 党丁盈, 刘新利, 伍镭, 等. W/WO_2.72一维纳米异质结构的合成及生长机理[J]. 粉末冶金材料科学与工程, 2013, 18(5): 627-630.
DANG Dingying, LIU Xinli, WU Lei, et al.Synthesis and growth mechanism of one-dimensional nano W/WO_2.72 heterostructures[J]. Materials Science and Engineering of Powder Metallurgy, 2013, 18(5): 627-630.
[16] SRIVASTAV A K, BASU J, KASHYAP S, et al.Crystallographic-shear-phase-driven W₁₈O₄₉ nanowires growth on nanocrystalline W surfaces[J]. Scripta Materialia, 2016, 115: 28-32.
[17] HARBNER R, SCHUBERT W D, LASSNER E, et al.Mechanism of technical reduction of tungsten, Part 2: Hydrogen reduction of tungsten blue oxide to tungsten powder[J]. High- Frequency Ultrasound, 1983, 2(4): 156-163.
[18] 刘新利, 张泉, 王世良, 等. W₁₈O₄₉亚微米棒阵列的制备及其生长机理[J]. 中国有色金属学报, 2011, 21(5): 1093-1098.
LIU Xinli, ZHANG Quan, WANG Shiliang, et al.Synthesis and growth mechanism of W₁₈O₄₉ submicron-rod arrays[J]. The Chinese Journal of Nonferrous Metals, 2011, 21(5): 1093-1098.