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| 论文编号: |
122214O120120279 |
| 第一作者所在部门: |
609组 |
| 中文论文题目: |
Synthesis and Characterization of α-, β-, and γ-Ga2O3 prepared from Aqueous Solutions by Controlled Precipitation,
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| 英文论文题目: |
Synthesis and Characterization of α-, β-, and γ-Ga2O3 prepared from Aqueous Solutions by Controlled Precipitation,
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| 论文题目英文: |
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| 作者: |
李连地
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| 论文出处: |
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| 刊物名称: |
Solid State Sciences
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| 年: |
2012
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| 卷: |
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| 期: |
14 |
| 页: |
971-981 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
1.856
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| 摘要: |
a, b and g-Ga2O3 have been successfully obtained in an easily scalable synthesis using aqueous solution
of gallium nitrate and sodium carbonate as starting materials without any surfactant and additive. a and
b-Ga2O3 were obtained by calcination at 350 and 700 S, respectively, of a-GaOOH, prepared by
controlled precipitation at constant pH 6 and T ？ 55 S, with 24 h of aging. Aging was necessary to fully
convert the initially preciptated gel into a well-crystalline and phase-pure material. g-Ga2O3 was
obtained after calcination at 500 S of gallia gel, synthesized at constant pH 4 and T ？ 25 S, without
aging. These three polymorphs have a for gallia relatively high surface area: 55 m2/g (a-Ga2O3), 23 m2/g
(b-Ga2O3) and 116 m2/g (g-Ga2O3). The combination of X-ray diffraction (XRD), scanning electron
microscopy (SEM), energy dispersive X-ray analysis (EDX), nitrogen physisorption and thermogravimetry
(TG) was employed to characterize the samples and their formation. |
| 英文摘要: |
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| 外单位作者单位: |
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| 备注: |
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