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Preparing method of calcium ferrite/calcium titanate diffusion couple

A technology of calcium ferrite and calcium titanate, which is applied in the field of material research, can solve the problems of unknown physical and chemical properties of calcium ferrite and calcium titanate, and achieve the effects of high density, narrow diffusion and mixing transition area, and smooth interface

Active Publication Date: 2019-04-19
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the physical and chemical properties of the respective chemical reactions of calcium ferrite and calcium titanate are unknown. For such chemical reactions, the diffusion couple method is an efficient method to study such problems. In previous studies, few people have prepared calcium perferrate. / calcium titanate diffusion couple to explore the reaction between the two

Method used

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  • Preparing method of calcium ferrite/calcium titanate diffusion couple
  • Preparing method of calcium ferrite/calcium titanate diffusion couple
  • Preparing method of calcium ferrite/calcium titanate diffusion couple

Examples

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Effect test

Embodiment 1

[0033] S1, the Fe 2 o 3 The powder and CaO powder are mixed according to the ratio of 1:1.3 and packed in a cylindrical airtight plastic cylinder. Put the cylinder into a mixer and mix for 5 hours to make the two powders mix evenly. After mixing, put the mixed powder in a mortar, stir and grind evenly, then put the mixed powder into a stainless steel mold with an inner diameter of 30mm with a medicine spoon, and press the mixed powder into a consolidated tablet with a tablet machine , the pressure is 10MPa, and the pressure time is 5min. Place the obtained flakes on a corundum vessel, put them into a muffle furnace, raise the temperature to 1100°C at a rate of 10°C / min, keep it warm for 8 hours, and then air-cool to room temperature to obtain the following: figure 1 The calcium ferrite sheet (sample) shown is composed of figure 1 It can be seen that Fe 2 o 3 And CaO has formed a whole, reached the reaction temperature of calcium ferrite formation. figure 2 for will fig...

Embodiment 2

[0041] S1, the Fe 2 o 3The powder and CaO powder are mixed according to the ratio of 1:1.1 and packed in a cylindrical airtight plastic cylinder. Put the cylinder into a mixer and mix for 5 hours to make the two powders mix evenly. After mixing, put the mixed powder in a mortar, stir and grind evenly, then put the mixed powder into a stainless steel mold with an inner diameter of 30mm with a medicine spoon, and press the mixed powder into a consolidated tablet with a tablet machine , the pressure is 10MPa, and the pressure time is 7min. Place the obtained flakes on a corundum vessel, put them into a muffle furnace, raise the temperature to 1080°C at a heating rate of 10°C / min, keep it warm for 8 hours, and then air cool to room temperature to obtain calcium ferrite flakes.

[0042] S2. Put the calcium ferrite flakes in a mortar, crush and grind them to obtain calcium ferrite powder, mix the calcium ferrite powder with dilute hydrochloric acid and place them in a constant tem...

Embodiment 3

[0048] S1, the Fe 2 o 3 The powder and CaO powder are mixed in a cylindrical airtight plastic cylinder according to the ratio of the amount of the substance at 1:1.5, and the cylinder is put into a mixer and mixed for 5 hours to make the two powders mix evenly. After mixing, put the mixed powder in a mortar, stir and grind evenly, then put the mixed powder into a stainless steel mold with an inner diameter of 30mm with a medicine spoon, and press the mixed powder into a consolidated tablet with a tablet machine , the pressure is 11MPa, and the pressure time is 6min. Place the obtained flakes on a corundum vessel, put them into a muffle furnace, raise the temperature to 1120°C at a heating rate of 10°C / min, keep it warm for 10h, and then air-cool to room temperature to obtain calcium ferrite flakes.

[0049] S2. Put the calcium ferrite flakes in a mortar, crush and grind them to obtain calcium ferrite powder, mix the calcium ferrite powder with dilute hydrochloric acid and pl...

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Abstract

The invention belongs to the technical field of material research methods, and particularly relates to a preparing method of a calcium ferrite / calcium titanate diffusion couple. The method comprises the following steps of S1, mixing iron trioxide powder with calcium oxide powder, and conducting tabletting and sintering to obtain calcium ferrite tablets; S2, mixing the calcium ferrite tablets withcalcium titanate powder, and conducting tabletting to obtain calcium ferrite and calcium titanate dual-layer tabelts; S3, sintering the calcium ferrite and calcium titanate dual-layer tabelts to prepare the calcium ferrite / calcium titanate diffusion couple. The prepared calcium ferrite / calcium titanate diffusion couple is small in diffusion width and has a small influence on subsequent experimentresults.

Description

technical field [0001] The invention belongs to the technical field of material research methods, and in particular relates to a preparation method of a calcium ferrite / calcium titanate diffusion couple. Background technique [0002] Iron and steel is an important material basis for economic development and social construction. With the economic downturn of iron and steel enterprises, domestic iron and steel enterprises have to start using self-produced low-grade vanadium-titanium magnetite ore. In the past, due to technical and economical reasons, this kind of ore was once considered a "dead mine". In recent years, due to the advancement of science and technology and the development of vanadium-titanium magnetite smelting research work, vanadium-titanium magnetite has a considerable industrial production scale. For this part of vanadium-titanium ore resources, the current main utilization method is still the blast furnace ironmaking process. [0003] The basic process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B41/87C04B35/626
CPCC04B35/01C04B35/6261C04B41/009C04B41/5041C04B41/87C04B2235/3208C04B2235/3272C04B2235/6562C04B41/0072C04B41/4545
Inventor 韦旺岳宏瑞薛向欣
Owner NORTHEASTERN UNIV
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