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Titanium-containing calcium hexaluminate material and preparation method thereof

A technology of calcium titanium hexaaluminate and content, applied in the field of titanium-containing calcium hexaaluminate materials and their preparation, can solve the problems of poor chemical stability and thermal shock resistance, high energy consumption in the preparation process, complex phase composition, etc. question

Active Publication Date: 2020-07-07
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% manganous 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°C for 12-24 hours; Keep it warm for 4 to 8 hours to get titanium-containing calcium hexaaluminate material.

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

[0028] The titanium-containing calcium hexaaluminate material prepared in this example is tested: 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% manganous 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 150-200 MPa to obtain a green body; then the green body is dried at 110-160°C for 24-36 hours, and at 1650-1800°C Keep it warm for 1 to 5 hours to obtain titanium-containing calcium hexaaluminate material.

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

[0032] The titanium-containing calcium hexaaluminate material prepared in this example is tested: 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% of alumina micropowder, 15-20wt% of calcium-containing micropowder, 15-20wt% of titanium oxide micropowder and 4-10wt% of manganous 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°C for 12-24 hours; Keep it warm for 4 to 8 hours to get titanium-containing calcium hexaaluminate material.

[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 tested: 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 hexaluminate material and a preparation method thereof. According to the technical scheme, the preparation method comprises the following steps:by taking 60-80wt% of aluminum oxide micro powder, 5-20wt% of calcium-containing micro powder, 10-20wt% of titanium oxide micro powder and 1-10wt% of manganous oxide micro powder as raw materials, uniformly mixing the raw materials in a planetary ball mill to obtain a mixture; then, the mixture is subjected to mechanical pressing forming under the condition of 100-200 MPa, and a green body is obtained; and drying the green body at 110-200 DEG C for 12-36 hours, and carrying out heat preservation at 1500-1800 DEG C for 1-8 hours to obtain the titanium-containing calcium hexaluminate material. Wherein the particle size D50 of the aluminum oxide micro powder is 1-8 microns; wherein the particle size D50 of the calcium-containing micro powder is 1-10 microns; wherein the particle size D50 of the titanium oxide micro-powder is 1-10 [mu] m; wherein the particle size D50 of the manganous oxide micro powder is 1-8 microns. The preparation method is low in cost and simple in process, and the prepared product has the characteristics of good chemical stability, good thermal shock resistance and strong titanium-aluminum alloy melt resistance.

Description

technical field [0001] The invention belongs to the technical field of refractory raw materials. It specifically relates to a titanium-containing calcium hexaaluminate material and a preparation method thereof. Background technique [0002] Titanium-aluminum alloy has low density, high specific strength, high specific stiffness, good heat resistance, excellent high temperature creep resistance and good oxidation resistance. It is the material of choice for hypersonic aircraft and the next generation of advanced aero-engines. The chemical activity of titanium-aluminum alloy melt is high at high temperature. During the melting process, it is easy to react with refractory material crucible and pollute the alloy melt. key premise. [0003] CaO-Al 2 o 3 -TiO 2 In the series of materials, TiO 2 and Al 2 o 3 The component, when in contact with the titanium-aluminum alloy melt, can simultaneously inhibit the corrosion of the Ti component and the Al component in the alloy mel...

Claims

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Application Information

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Patent Type & Authority Applications(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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