High-temperature and high-pressure preparation method of cubic-phase scandium germanium oxide

A technology of germanium oxide, high temperature and high pressure, applied in the direction of magnetic properties of inorganic materials, to achieve high quality, high purity, and simple operation

Inactive Publication Date: 2015-04-15
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on the preparation of high temperature and high pressure

Method used

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  • High-temperature and high-pressure preparation method of cubic-phase scandium germanium oxide
  • High-temperature and high-pressure preparation method of cubic-phase scandium germanium oxide
  • High-temperature and high-pressure preparation method of cubic-phase scandium germanium oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0017] High-purity scandium oxide (Sc 2 o 3 ) and germanium oxide (GeO 2 ) at a molar ratio of 1:2 for 4 hours, fully mixed, powder compacted and then put into a high-temperature muffle furnace for sintering at a sintering temperature of 1200°C, holding time of 24 hours, and then naturally cooled to room temperature to obtain the final sample. Scandium germanium oxide (Sc 2 Ge 2 o 7 ) has a monoclinic structure, the specific X-ray diffraction results are shown in figure 1 .

[0018] This embodiment is the preparation of Sc by high-temperature solid-phase method 2 Ge 2 o 7 Process for preparing Sc with the high temperature and high pressure of the present invention 2 Ge 2 o 7 method for comparison.

Embodiment 2

[0020] High-purity scandium oxide (Sc 2 o 3 ) and germanium oxide (GeO 2 ) at a molar ratio of 1:2. After the powder is pressed into flakes, first wrap boron nitride (BN) tubes around the flake samples, then put them into a graphite tube heating container, and finally put them into the pyrophyllite synthesis cavity. The synthetic pressure is 5GPa, the temperature is 1300°C, and the pressure holding time is 15 minutes. After the heating is stopped, the sample is naturally cooled to room temperature and then the pressure is released. Scandium germanium oxide (Sc 2 Ge 2 o 7 ) has a cubic structure and the best degree of crystallinity. For the specific X-ray diffraction results, see figure 2 .

Embodiment 3

[0022] Using the same raw materials and assembly as in Example 2, the synthetic pressure is 5GPa, the temperature is 1300°C, and the holding time is 30 minutes. After stopping the heating, the sample is naturally cooled to room temperature and then the pressure is released. The cubic scandium germanium oxide prepared under this condition (Sc 2 Ge 2 o 7 ) with better crystallinity. For specific X-ray diffraction results, see image 3 .

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Abstract

The invention discloses a high-temperature and high-pressure preparation method of cubic-phase scandium germanium oxide, and belongs to the technical field of magnet material preparation. The high-temperature high-pressure preparation method includes taking scandium oxide and germanium oxide as raw material and preparing the cubic-phase scandium germanium oxide through technical processes of material mixing and briquetting, packaging, high-temperature and high-pressure combination, cooling and pressure releasing. The high-temperature and high-pressure combination includes keeping temperature at 1300-1500 DEG C and pressure at 5 GPa for 15-60 minutes, and finally cooling and releasing pressure. The high-temperature and high-pressure preparation method is completely processed in the environment without water and modifier, unnecessary impurities can be avoided radically, so that the obtained cubic-phase scandium germanium oxide is high in purity. Equipment adopted by the method is largely used for producing adamas, and is easy to operate; industrialization can be realized early; and high-quality cubic-phase scandium germanium oxide can be obtained.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation. Specifically related to the cubic phase of scandium germanium oxide, as well as scandium oxide (Sc 2 o 3 ), germanium oxide (GeO 2 ) as raw materials, using high temperature and high pressure preparation technology to synthesize cubic phase scandium germanium oxide. Background technique [0002] Magnetic materials are closely related to all aspects of informatization, automation, mechatronics, national defense, and national economy. Magnetic materials are an important pillar and foundation of the national economy, and the development of magnetic materials is very rapid in recent years, especially the continuous emergence of new magnetic materials, which has played a huge role in promoting the progress of modern industrial technology. Among the currently studied magnetic materials, there is a class of pyrochlore-type oxides, whose general chemical formula is A 2 B 2 o ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/10C04B35/01C04B35/645
Inventor 王欣李会朱品文袁宝陶强
Owner JILIN UNIV
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