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A titanium-containing calcium hexaaluminate material and its preparation method

A technology of calcium hexaaluminate content, which is applied in the field of calcium hexaaluminate materials containing titanium and its preparation, can solve the problems of poor chemical stability and thermal shock resistance, low phase content of calcium hexaaluminate containing titanium, The problem of high energy consumption in the preparation process can avoid the phenomenon of solid solution-desolvation, not easy to desolventize, and have good chemical stability

Active Publication Date: 2022-05-27
YIXING MORGAN THERMAL CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the energy consumption of the electrofusion preparation process is higher than that of the sintering method, the cost is high, and the preparation process is complicated; secondly, the content of titanium-containing calcium hexaaluminate phase in the material is low, and there are a large amount of calcium hexaaluminate, di The phase composition of calcium aluminate and calcium titanate is too complex, resulting in poor chemical stability and thermal shock resistance; finally, when in contact with the titanium-aluminum alloy melt, due to the uneven composition of the material, it is easily affected by the alloy Erosion of the melt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A titanium-containing calcium hexaaluminate material and a preparation method thereof. Using 60-65wt% alumina micropowder, 15-20wt% calcium-containing micropowder, 15-20wt% titanium oxide micropowder and 1-6wt% manganese oxide micropowder as raw materials, the raw materials are mixed uniformly in a planetary ball mill , to obtain a mixture; then press the mixture under the condition of 100-150MPa to obtain a green body; then dry the green body at 150-200 ℃ for 12-24 hours, at 1500-1650 ℃ Under heat preservation for 4 to 8 hours, the titanium-containing calcium hexaaluminate material is obtained.

[0027] The calcium-containing micropowder is calcium hydroxide.

[0028] The titanium-containing calcium hexaaluminate material prepared in this example is detected: Ca((Al 0.84 Ti 0.16 ) 2 ) 6 O 19 The phase content is greater than 92 wt%.

Embodiment 2

[0030]A titanium-containing calcium hexaaluminate material and a preparation method thereof. Using 60-65wt% alumina micropowder, 15-20wt% calcium-containing micropowder, 15-20wt% titanium oxide micropowder and 1-6wt% manganese oxide micropowder as raw materials, the raw materials are mixed uniformly in a planetary ball mill , to obtain a mixture; then the mixture is machine-pressed at 150-200MPa to obtain a green body; then the green body is dried at 110-160°C for 24-36 hours, at 1650-1800°C Under heat preservation for 1 to 5 hours, the titanium-containing calcium hexaaluminate material is obtained.

[0031] The calcium-containing micropowder is calcium carbonate.

[0032] The titanium-containing calcium hexaaluminate material prepared in this example is detected: Ca((Al 0.84 Ti 0.16 ) 2 ) 6 O 19 The phase content is greater than 92 wt%.

Embodiment 3

[0034] A titanium-containing calcium hexaaluminate material and a preparation method thereof. Using 60-65wt% alumina micropowder, 15-20wt% calcium-containing micropowder, 15-20wt% titanium oxide micropowder and 4-10wt% manganese oxide micropowder as raw materials, the raw materials are mixed uniformly in a planetary ball mill , to obtain a mixture; then press the mixture under the condition of 100-150MPa to obtain a green body; then dry the green body at 150-200 ℃ for 12-24 hours, at 1500-1650 ℃ Under heat preservation for 4 to 8 hours, the titanium-containing calcium hexaaluminate material is obtained.

[0035] The calcium-containing micropowder is a mixture of calcium hydroxide and calcium carbonate.

[0036] The titanium-containing calcium hexaaluminate material prepared in this example is detected: Ca((Al 0.84 Ti 0.16 ) 2 ) 6 O 19 The phase content is greater than 90 wt%.

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Abstract

The invention relates to a titanium-containing calcium hexaaluminate material and a preparation method thereof. The technical scheme is: using 60-80wt% of alumina micropowder, 5-20wt% of calcium-containing micropowder, 10-20wt% of titanium oxide micropowder and 1-10wt% of manganous oxide micropowder as raw materials; Mix evenly in a planetary ball mill to obtain a mixture. Then the mixture is machine-pressed at 100-200MPa to obtain a green body; then the green body is dried at 110-200°C for 12-36 hours, and kept at 1500-1800°C for 1-8 hours. Hours, that is, titanium-containing calcium hexaaluminate material. The particle size D of the alumina micropowder 50 1-8 μm; the particle size of the calcium-containing micropowder D 50 1 to 10 μm; the particle size D of the titanium oxide micropowder 50 1 to 10 μm; the particle size D of the manganese oxide micropowder 50 1 to 8 μm. The invention has low cost and simple process, and the manufactured product has the characteristics of good chemical stability, good thermal shock resistance and strong resistance to titanium-aluminum alloy melt.

Description

technical field [0001] The invention belongs to the technical field of refractory raw materials. Specifically, it relates to a titanium-containing calcium hexaaluminate material and a preparation method thereof. Background technique [0002] Titanium-aluminum alloys have low density, high specific strength, high specific stiffness, good heat resistance, excellent high temperature creep resistance and good oxidation resistance. They are the materials of choice for hypersonic aircraft and next-generation advanced aero-engines. Titanium-aluminum alloy melt has high chemical activity at high temperature. During the smelting process, it is easy to react with the refractory crucible to pollute the alloy melt. Therefore, the development of refractory materials for smelting titanium-aluminum alloy with excellent performance is the best way to prepare high-quality titanium-aluminum alloy. key premise. [0003] CaO-Al 2 O 3 -TiO 2 TiO 2 and Al 2 O 3 When it is in contact with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/44C04B35/66C04B35/622
CPCC04B35/44C04B35/66C04B35/622C04B2235/3208C04B2235/3217C04B2235/3232C04B2235/3262C04B2235/5436C04B2235/656C04B2235/6567C04B2235/9607C04B2235/9676C04B35/6261C04B2235/442C04B2235/604C04B2235/606C04B2235/44C04B35/62655C04B35/64C04B2235/3222C22B9/16
Inventor 付绿平顾华志黄奥张美杰
Owner YIXING MORGAN THERMAL CERAMICS CO LTD
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