[1]李銳星,張云,趙斌,等.碳熱還原協同溶膠-凝膠法合成納米ZrB2粉末[J].中國材料進展,2012,(7):059-63.[doi:10.7502/j.issn.1674-3962.2012.07.08]
LI Ruixing,ZHANGYun,ZHAO Bin,et al.Carbothermal Reduction Acted Synergistically with Sol Gel Method to Synthesize ZrB2 Nanoparticles[J].MATERIALS CHINA,2012,(7):059-63.[doi:10.7502/j.issn.1674-3962.2012.07.08]
點擊復制
碳熱還原協同溶膠-凝膠法合成納米ZrB2粉末(
)
中國材料進展[ISSN:1674-3962/CN:61-1473/TG]
- 卷:
-
- 期數:
-
2012年第7期
- 頁碼:
-
059-63
- 欄目:
-
特約研究論文
- 出版日期:
-
2012-07-25
文章信息/Info
- Title:
-
Carbothermal Reduction Acted Synergistically with Sol Gel Method to Synthesize ZrB2 Nanoparticles
- 作者:
-
李銳星; 張云; 趙斌; 姜沿杉; 李軍平; 馮志海
-
(1北京航空航天大學材料科學與工程學院 空天材料與服役教育部重點實驗室，北京100191)
(2航天材料及工藝研究所，北京 100076)
- Author(s):
-
LI Ruixing; ZHANGYun; ZHAO Bin; JIANG Yanshan; LI Junping; FENG Zhihai
-
(1.Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China)
(2 Aerospace Research Institute of Materials & Processing Technology, Beijing 100076, China)
-
- 關鍵詞:
-
ZrB2; 納米顆粒; 合成; 溶膠-凝膠; 碳熱還原
- DOI:
-
10.7502/j.issn.1674-3962.2012.07.08
- 文獻標志碼:
-
A
- 摘要:
-
利用ZrO2B2O3C反應體系碳熱還原的基本原理，分別使用正丙醇鋯(Zr(OC3H7)4)、硼酸(H3BO3)和蔗糖(C12H22O11)為原料，采用溶膠-凝膠-碳熱還原法合成了二硼化鋯（ZrB2）納米粉末。我們首先使用絡合劑醋酸(AcOH)修飾Zr(OC3H7)4，以防止Zr(OC3H7)4的快速水解；其次，選用蔗糖作為碳源，是考慮到蔗糖熱解時可以完全分解為碳，這樣可以準確計算熱解過程碳的生成量。此外，研究了凝膠溫度對ZrB2納米粉末形貌的影響。結果表明：當起始原料B/Zr (mol)=23、熱解溫度為1 550 ℃時，通過碳熱還原協同溶膠-凝膠法成功合成了單相ZrB2納米粉末；當凝膠溫度分別為65、75和85 ℃時，ZrB2納米粉末形貌從球狀演變為鏈狀，最后生長為棒狀，生長機理為定向吸附。
- Abstract:
-
Carbothermal reduction acted synergistically with solgel method to synthesize zirconium diboride (ZrB2) Nanoparticles was conducted using zirconium npropoxide (Zr(OPr)4), boric acid (H3BO3), sucrose (C12H22O11), and acetic acid (AcOH).Here, C12H22O11 was selected since it can be completely decomposed to carbon.Thus, carbon might be accounted precisely for the carbothermal reduction reaction.We investigated the influence of the gelation temperature on the morphology of ZrB2 particles.Increasing the gelation temperature, the particle shapes changed from spherelike particles at 65 ℃ to particles chains at 75 ℃, and then rodlike particles at 85 ℃.An indepth HRTEM observation revealed that the nanoparticles of ZrB2 were gradually fused together to evolve into a particle chain, finally into a rodlike shape.These morphologies related to the gelation temperature and obeyed the “oriented attachment mechanism” of crystallography.
更新日期/Last Update:
2012-08-02