KR950017843A - High strength-low thermal expansion aluminum titanate ceramics and method of manufacturing the same - Google Patents

High strength-low thermal expansion aluminum titanate ceramics and method of manufacturing the same Download PDF

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KR950017843A
KR950017843A KR1019930029961A KR930029961A KR950017843A KR 950017843 A KR950017843 A KR 950017843A KR 1019930029961 A KR1019930029961 A KR 1019930029961A KR 930029961 A KR930029961 A KR 930029961A KR 950017843 A KR950017843 A KR 950017843A
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aluminum titanate
powder
suspension
weight ratio
titanate ceramics
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KR960006247B1 (en
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배우현
정한남
홍기곤
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조말수
포항종합제철주식회사
백덕현
재단법인산업과학기술연구소
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62645—Thermal treatment of powders or mixtures thereof other than sintering
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/478—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on aluminium titanates
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    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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Abstract

본 발명은 자동차용 촉매담체, 용융금속필터, 내화재료등의 고온구조재료로 사용되는 고강도-저열팽창성 알루미늄티타네이트 세라믹스 및 그 제조방법에 관한 것으로써, 콜로이드 혼합법을 이용하여 첨가원료를 균일하게 혼합함으로써, 분해방지 효과 및 강도증진 효과를 향상시키고 1200℃에서 열팽창율을 0.25%이하로 유지하는 알루미늄티타네이트 세라믹스 및 그 제조방법을 제공하고자 하는데, 그 목적이 있다.The present invention relates to a high-strength low-expansion aluminum titanate ceramics used for high-temperature structural materials such as catalyst carriers, molten metal filters, and refractory materials for automobiles, and to a method for manufacturing the same. The purpose of the present invention is to provide an aluminum titanate ceramics and a method of manufacturing the same, which improves the effect of preventing decomposition and enhancing strength, and maintains the coefficient of thermal expansion of 0.25% or less at 1200 ° C by mixing.

본 발명은 알루미늄 티타네이트 세라믹스를 제조하는 방법에 있어서, 알루미늄티타네이트 분체 100중량비에 대하여 최종적으로 생성되는 마그네시아의 조성이 2.5-4.5중량비가 되도록 마그네슘염과 알루미늄 티타네이트의 현탁수용액을 제조하는 단계; 이를 교반하면서 암모니아수를 적정하여 pH를 5-9로 조절하는 단계; 위의 현탁액을 건조하고 1300-1450℃에서 하소하여 분체를 얻는 단계; 이 분체를 알루미늄티타네이트 분체 100중량비에 대하여 최종적으로 생성되는 3-5몰% 이트리아로 안정화된 안정화지르코니아가 3.5-5.5중량비가 되도록 제조된 지르코늄염과 이트리움염의 수용액에 분산시키는 단계; 위의 현탄액을 교반하면서 암모니아수로 pH를 6-10으로 조절하는 단계 이를 건조하고 600℃이상에서 하소하여 복합분체를 제조하는 단계; 및 복합 분체를 성형하고 1450-1550℃로 소결하는 단계로 이루어지는 것을 특징으로 하는 고강도-저열팽창성 알루미늄티타네이트 세라믹스의 제조방법 및 이 제조방법에 의해 제조된 알루미늄티타네이트 세라믹을 그 요지로 한다.The present invention provides a method for producing aluminum titanate ceramics, the method comprising: preparing a suspension solution of magnesium salt and aluminum titanate so that the composition of magnesia finally produced with respect to 100 weight ratio of aluminum titanate powder is 2.5-4.5 weight ratio; Titrating ammonia water while stirring it to adjust the pH to 5-9; Drying the suspension and calcining at 1300-1450 ° C. to obtain powder; Dispersing the powder in an aqueous solution of zirconium salt and yttrium salt prepared so that stabilized zirconia stabilized with 3-5 mol% yttria finally produced with respect to 100 weight ratio of aluminum titanate powder is 3.5-5.5 weight ratio; A step of adjusting the pH to 6-10 with ammonia water while stirring the suspension is dried and calcined at 600 ℃ or more to prepare a composite powder; And a method for producing a high-strength low-expansion aluminum titanate ceramics characterized by forming a composite powder and sintering at 1450-1550 ° C., and an aluminum titanate ceramic produced by the production method.

Description

고강도-저열팽창성 알루미늄티타네이트 세라믹스 및 그 제조방법High strength, low thermal expansion aluminum titanate ceramics and method of manufacturing the same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 알루미늄티타네이트 분체의 중량에 대한 마그네시아 및 안정화 지르코니아의 첨가량 변화에 따른 열팽창율 및 꺾임강도 변화를 나타내는 그래프.1 is a graph showing a change in thermal expansion and bending strength according to the amount of magnesia and stabilized zirconia added to the weight of aluminum titanate powder.

Claims (2)

알루미늄티타네이트 세라믹스를 제조하는 방법에 있어서, 알루미늄티타네이트 분체 100중량비에 대하여 최종적으로 생성되는 마그네시아의 조성이 2.5-4.5중량비가 되도록 마그네슘염과 알루미늄 티타네이트의 현탁수용액을 제조하는 단계; 상기 현탁 수용액을 교반하면서 암모니아수를 적정하여 pH를 5-9로 조절하는 단계; 상기 현탁액을 건조하고 1300-1450℃에서 하소하여 분체를 얻는 단계; 이 분체를 알루미늄티타네이트 분체 100중량비에 대하여 최종적으로 생성되는 3-5몰% 의 이트리아로 안정화된 안정화지르코니아가 3.5-5.5중량비가 되도록 제조된 지르코늄염과 이트리움염의 수용액에 분산시키는 단계; 상기 현탁액을 교반하면서 암모니아수로 pH를 6-10으로 조절하는 단계 상기 현탁액을 건조하고 600℃ 이상에서 하소하여 복합분체를 제조하는 단계 상기 복합 분체를 성형하고 1450-1550℃ 로 소결하는 단계로 이루어지는 것을 특징으로 하는 고강도-저열팽창성 알루미늄티타네이트 세라믹스의 제조방법.A method for producing aluminum titanate ceramics, the method comprising: preparing a suspension solution of magnesium salt and aluminum titanate such that the composition of magnesia finally produced is 2.5 to 4.5 parts by weight based on 100 parts by weight of aluminum titanate powder; Adjusting the pH to 5-9 by titrating ammonia water while stirring the suspension aqueous solution; Drying the suspension and calcining at 1300-1450 ° C. to obtain powder; Dispersing the powder in an aqueous solution of zirconium salt and yttrium salt prepared so that stabilized zirconia stabilized with 3-5 mole% of yttria finally produced with respect to 100 parts by weight of aluminum titanate powder becomes 3.5-5.5 by weight; Adjusting the pH to 6-10 with ammonia water while stirring the suspension, and drying the suspension and calcining at 600 ° C. or higher to prepare a composite powder, comprising forming the composite powder and sintering at 1450-1550 ° C. A method for producing high strength, low thermally expandable aluminum titanate ceramics. 알루미늄티타네이트 100중량비에 대하여 마그네시아의 함량이 2.5-4.5중량비이고,3-5몰%이트리아로 안정화된 지르코니아가 3.5-5.5중량비이며,1200℃에서의 열팽창율이 0.25% 이하인 것을 특징으로 하는 고강도-저열팽창성 알루이늄티타네이트 세라믹스.Magnesia content is 2.5-4.5 weight ratio with respect to 100 weight ratio of aluminum titanate, 3.5-5.5 weight ratio of zirconia stabilized with 3-5 mol% yttria, and thermal expansion coefficient in 1200 degreeC is 0.25% or less Low thermal expansion aluminum titanate ceramics. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930029961A 1993-12-27 1993-12-27 Process for the preparation of aluminium titanate ceramics KR960006247B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100340429B1 (en) * 1999-09-22 2002-06-12 이창섭 Manufacturing method of reinforced alumina ceramic

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105967662A (en) * 2016-05-06 2016-09-28 王泽陆 Alumina/strontia biological ceramic and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100340429B1 (en) * 1999-09-22 2002-06-12 이창섭 Manufacturing method of reinforced alumina ceramic

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