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Ferromagnetic Sr2FeSi2O7 microcrystal glass and preparation method thereof

A glass-ceramic and ferromagnetic technology, applied in the field of magnetic glass-ceramic preparation, can solve the problems of long production cycle, easy generation of pores, unfavorable industrial production, etc., and achieve the effect of avoiding uneven composition

Inactive Publication Date: 2015-12-02
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing technology, the main problems of the powder sintering method are: long production cycle, easy to produce defects such as pores during the sintering process, and then affect the density of the material
The main problems of the sol-gel method are: long production cycle and high cost, which make it unfavorable for industrial production; and there is no multiferroic material Sr 2 FeSi 2 o 7 report

Method used

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  • Ferromagnetic Sr2FeSi2O7 microcrystal glass and preparation method thereof
  • Ferromagnetic Sr2FeSi2O7 microcrystal glass and preparation method thereof
  • Ferromagnetic Sr2FeSi2O7 microcrystal glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Put analytically pure strontium carbonate, analytically pure boric acid, SiO 2 , CeO2 and Sb 2 o 3 , so that it meets the requirements of 20 parts of SrO and 20 parts of Fe in terms of parts by mass. 2 o 3 , 20 copies of B 2 o 3 , 40 parts of SiO 2 , 0.3 parts of CeO 2 and 0.2 parts of Sb 2 o 3 , mixed evenly to obtain the batch material;

[0029] Step 2: Add the uniformly mixed batch material into a corundum crucible at 1100°C, heat up to 1350°C for melting to form molten glass, and keep warm at 1350°C for 1 hour to obtain a clear and homogeneous molten glass;

[0030] Step 3: Quickly pour the evenly melted molten glass onto a stainless steel plate, transfer it to an annealing furnace at 500°C immediately after forming, keep it warm for 2 hours, and then cool down to room temperature with the furnace to obtain strontium iron borosilicate glass;

[0031] Step 4: Cut the prepared strontium iron borosilicate glass into a certain shape, place the cut samp...

Embodiment 2

[0037] Step 1: Put analytically pure strontium carbonate, analytically pure boric acid, SiO 2 , CeO 2 and Sb 2 o 3 , so that it meets the requirements of 20 parts of SrO and 20 parts of Fe in terms of parts by mass 2 o 3 , 30 copies of B 2 o 3 , 30 parts of SiO 2 , 0.3 parts of CeO 2 and 0.2 parts of Sb 2 o 3 , mixed evenly to obtain the batch material;

[0038] Step 2: Add the uniformly mixed batch material into a corundum crucible at 1100°C, heat up to 1300°C for melting to form molten glass, and keep warm at 1300°C for 1 hour to obtain a clear and homogeneous molten glass;

[0039] Step 3: Quickly pour the evenly melted molten glass onto a stainless steel plate, transfer it to an annealing furnace at 500°C immediately after forming, keep it warm for 2 hours, and then cool down to room temperature with the furnace to obtain strontium iron borosilicate glass;

[0040] Step 4: Cut the prepared strontium iron borosilicate glass into a certain shape, put the cut sampl...

Embodiment 3

[0042] Step 1: Put analytically pure strontium carbonate, analytically pure boric acid, SiO 2 , CeO 2 and Sb 2 o 3 , so that it meets the requirements of 20 parts of SrO and 20 parts of Fe in terms of parts by mass. 2 o 3 , 40 copies of B 2 o 3 , 20 parts of SiO 2 , 0.3 parts of CeO 2 and 0.2 parts of Sb 2 o 3 , mixed evenly to obtain the batch material;

[0043] Step 2: Add the uniformly mixed batch material into a corundum crucible at 1100°C, heat up to 1250°C for melting to form molten glass, and keep warm at 1250°C for 1 hour to obtain a clear and homogeneous molten glass;

[0044] Step 3: Quickly pour the evenly melted molten glass onto a stainless steel plate, transfer it to an annealing furnace at 500°C immediately after forming, keep it warm for 2 hours, and then cool to room temperature with the furnace to obtain strontium iron borosilicate glass;

[0045] Step 4: Cut the prepared strontium iron borosilicate glass into a certain shape, put the cut sample on...

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Abstract

The invention discloses ferromagnetic Sr2FeSi2O7 microcrystal glass and a preparation method thereof. The preparation method comprises the following steps of proportioning strontium oxide, ferric oxide, boron oxide, silicon dioxide, cerium oxide and antimony oxide according to a certain chemical ratio, then, melting to form molten glass, and carrying out heat insulation on the molten glass; then, rapidly pouring the molten glass into a heated die for forming, rapidly transferring the molten glass to an annealing furnace after forming to carry out precise annealing treatment, and then, carrying out furnace cooling to obtain strontium-ferrum-boron-silicon glass; and after cutting the glass, placing the glass on an aluminum oxide board, heating to the required temperature, and carrying out heat insulation treatment. The preparation method is low in adopted raw material price, energy-saving, environment-friendly, suitable for industrial production, simple in operation, short in preparation period and low in cost, and the raw materials used in the preparation process are environment-friendly; and the prepared ferromagnetic Sr2FeSi2O7 is small in size (about submicron-order), relatively high in crystal purity, extremely low in impure phase content, compact in component, uniform in crystal size distribution and excellent in ferromagnetic performance.

Description

technical field [0001] The invention belongs to the technical field of magnetic glass-ceramic preparation and relates to a ferromagnetic Sr 2 FeSi 2 o 7 Glass-ceramic and its preparation method. Background technique [0002] Magnetic glass-ceramic is a special composite material composed of magnetic crystals embedded in a glass matrix. This material is a kind of polycrystalline solid material containing a large number of magnetic microcrystalline phases and glass phases, which is obtained by controlling the crystallization of the basic glass with a specific composition during the heating process. The comprehensive performance of glass-ceramics is mainly determined by three factors: the composition of the original composition, the size and quantity of crystallites, and the nature and quantity of the residual glass phase. Among them, the original composition is different, and the types of crystal phases are also different, and various crystal phases endow glass-ceramics wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/14
Inventor 蒲永平张盼盼赵娇娇吴煜蓉罗延杰刘雨雯
Owner SHAANXI UNIV OF SCI & TECH
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