固相反应法制备钴掺杂氧化镁传压介质

吴京军; 贺端威; 王强; 张佳威; 刘进

doi:10.11858/gywlxb.20180564

固相反应法制备钴掺杂氧化镁传压介质

doi: 10.11858/gywlxb.20180564

吴京军^{1, 2,},
贺端威^{1, 2,*, ,},
王强^{1, 2},
张佳威^{1, 2},
刘进^{1, 2}

1.
四川大学原子与分子物理研究所, 四川成都 610065
2.
四川大学高能量密度物理教育部重点实验室, 四川成都 610065

基金项目:

国家自然科学基金 51472171

国家自然科学基金重大仪器研制项目 11427810

四川省科技支撑计划 15ZC0946

中国工程物理研究院中子物理学重点实验室课题 2014AB02

详细信息

作者简介:
吴京军(1991-), 男, 硕士, 主要从事大腔体静高压装置相关材料和超硬材料的合成及高压物性研究.E-mail:scujingjunwu@163.com

通讯作者:
贺端威(1969-), 男, 博士, 教授, 主要从事大腔体静高压技术、超硬材料及高压下弹塑性行为研究.E-mail:duanweihe@scu.edu.cn

中图分类号: O521.2;O521.3
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出版历程
- 收稿日期: 2018-05-16
- 修回日期: 2018-05-24

Preparation of Cobalt-Doped Magnesium Oxide Pressure-Transmitting Medium with Solid Reaction Process

WU Jingjun^{1, 2
,},
HE Duanwei^{1, 2,*
, ,},
WANG Qiang^{1, 2},
ZHANG Jiawei^{1, 2},
LIU Jin^{1, 2}

1.
Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
2.
Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610065, China

摘要

摘要: 以氧化镁（MgO）和氧化钴（CoO）为初始材料，利用固相反应方法，经8 h的混料、200 MPa的预压以及在空气氛围下1 200℃的烧结等步骤，成功制备出钴的摩尔分数为9%的氧化镁传压介质（MgO+9% CoO）。采用X射线粉末衍射仪、扫描电子显微镜以及热重分析仪对样品进行表征，结果表明：在烧结过程中混合粉料之间发生了反应，金属离子相互交换，钴离子取代MgO晶格中的部分镁离子，从而形成MgO-CoO固溶体。与目前国产MgO传压介质（MgO+10% Na₄SiO₄（质量分数））相比，实验制备的钴掺杂MgO传压介质不含杂质，高温高压下更稳定，并且温度发生效率更高。
- 固相反应 /
- 高温高压 /
- MgO-CoO固溶体 /
- 传压介质 /
- 温度发生效率
Abstract: In this study, magnesium oxide (MgO) doped by cobalt (Co) was prepared as pressure-transmitting medium, by solid reaction process.The starting material is a pre-compressed mixture of MgO and cobalt oxide (CoO), which was mixed for 8 h and compressed at 200 MPa, and then treated at 1 200℃.The as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, and thermogravimetric analysis.The results demonstrate that during the sintering process, the reaction between MgO and CoO was completed and the exchange of metal ions between MgO and CoO leads to a single solid solution phase.Compared to the domestic products (MgO+10wt% Na₄SiO₄), there is no impurity found in Co-doped MgO, which is more stable than the domestic products under high pressure and high-temperature.In addition, the temperature-generation efficiency of the cell assembly with MgO+9mol% CoO as pressure-transmitting medium is also higher than that of the domestic products.
- solid reaction process /
- high pressure and high temperature /
- MgO-CoO solid solution /
- pressure-transmitting medium /
- temperature generation efficiency

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图 1 样品组装示意

Figure 1. Schematic of sample assembly

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图 2 混合粉料经不同温度处理后(a)以及MgO+9%CoO和MgO+10%Na₄SiO₄在12 GPa/2 000 ℃、12 GPa/1 800 ℃条件下处理前后(b)的XRD谱(图 2(b)中的温度为腔体中心温度)

Figure 2. XRD patterns of powder mixture treated at different temperatures (a) and MgO+9%CoO and MgO+10%Na₄SiO₄ before and after being treated at 12 GPa/2 000 ℃ and 12 GPa/1 800 ℃ (b) (The temperature in Fig. 2(b) represents the central temperature of the cell)

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图 3 MgO+9%CoO和MgO+10%Na₄SiO₄的SEM图像(图 3(b)中白色方形区域内的物质为Na₄SiO₄，2 000和1 800 ℃均代表腔体中心温度)

Figure 3. SEM images of MgO+9%CoO and MgO+10%Na₄SiO₄ (Na₄SiO₄ is marked by the white box in Fig. 2(b), and 2 000 and 1 800 ℃ represent the central temperature of the cell)

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图 4 热重分析结果

Figure 4. Thermogravimetric analysis results

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图 5 腔体压力为12 GPa下的温度发生效率测试结果

Figure 5. Efficiency of temperature generation measured at cell pressure of 12 GPa

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表 1 块体样品的压制及烧结情况

Table 1. Experimental details of pressing and sintering of bulk samples

No.	Load/ MPa	Dimension/ (mm×mm×mm)	Cracking	Density/ (g·cm^-3)
1	100	39×39×25	No	2.3
2	160	39×39×23	No	2.3
3	160	39×39×23	No	2.3
4	160	39×39×23	No	2.3
5	160	39×39×23	No	2.3
6	240	39×39×24	No	2.4
7	240	39×39×23	No	2.4
8	240	39×39×23	No	2.4
9	240	39×39×23	No	2.4

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参考文献(24)

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文章访问数: 7486
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固相反应法制备钴掺杂氧化镁传压介质

doi: 10.11858/gywlxb.20180564

作者简介: 吴京军(1991-), 男, 硕士, 主要从事大腔体静高压装置相关材料和超硬材料的合成及高压物性研究.E-mail:scujingjunwu@163.com

通讯作者: 贺端威(1969-), 男, 博士, 教授, 主要从事大腔体静高压技术、超硬材料及高压下弹塑性行为研究.E-mail:duanweihe@scu.edu.cn

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出版历程

Preparation of Cobalt-Doped Magnesium Oxide Pressure-Transmitting Medium with Solid Reaction Process

计量

出版历程

目录

作者简介:
吴京军(1991-), 男, 硕士, 主要从事大腔体静高压装置相关材料和超硬材料的合成及高压物性研究.E-mail:scujingjunwu@163.com

通讯作者:
贺端威(1969-), 男, 博士, 教授, 主要从事大腔体静高压技术、超硬材料及高压下弹塑性行为研究.E-mail:duanweihe@scu.edu.cn