KR950029231A - 안정화 지르코니아 분말의 제조방법 - Google Patents

안정화 지르코니아 분말의 제조방법 Download PDF

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KR950029231A
KR950029231A KR1019940008360A KR19940008360A KR950029231A KR 950029231 A KR950029231 A KR 950029231A KR 1019940008360 A KR1019940008360 A KR 1019940008360A KR 19940008360 A KR19940008360 A KR 19940008360A KR 950029231 A KR950029231 A KR 950029231A
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South Korea
Prior art keywords
zirconia powder
stabilized zirconia
water
organic solvent
precipitated
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KR1019940008360A
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English (en)
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KR960012723B1 (ko
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김윤호
강희복
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김은영
한국과학기술연구원
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Priority to KR1019940008360A priority Critical patent/KR960012723B1/ko
Publication of KR950029231A publication Critical patent/KR950029231A/ko
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Publication of KR960012723B1 publication Critical patent/KR960012723B1/ko

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/53—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone involving the removal of at least part of the materials of the treated article, e.g. etching, drying of hardened concrete
    • C04B41/5307—Removal of physically bonded water, e.g. drying of hardened concrete
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • 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
    • C04B35/62625—Wet mixtures
    • C04B35/6264—Mixing media, e.g. organic solvents
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • 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
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3229—Cerium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3246—Stabilised zirconias, e.g. YSZ or cerium stabilised zirconia
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • 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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C04B2235/3248—Zirconates or hafnates, e.g. zircon

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)

Abstract

본 발명은 공침법을 이용한 안정화 지르코니아 분말의 제조방법에 관한 것이다. 본 발명의 지르코니아 분의 제조과정은 지르코늄염과 안정화제염을 수산화물 형태로 침전시킨 후 함께 끓는 증류 (azeotropic distillation)법으로 분말입자 사이에 흡착응축된 수분을 제거한 다음 지르코늄을 함유하는 미립자를 유기용매로부터 분리시켜 열처리하는 공정으로 이루어진다. 본 발명의 방법에 의해 제조된 안정화 지르코니아 분말은 분말에 함유된 수분이 완전히 제거됨에 따라 소결체의 치밀화를 이룰 수 있는 이점이 있다.

Description

안정화 지르코니아 분말의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 방법에서 사용되는 함께 끓는증류(azeotropic distillation)장치의 개략구조도, 제2도는 950℃에서 하소된 지르코니아 분말의 평균입자 크기 분포를 나타낸 그래프, 제3도는 지르코니아 분말의 소결온도 변화에 따른 소결밀도의 변화 거동을 나타낸 그래프.

Claims (4)

  1. 수용성인 지르코늄염과 이트륨 또는 세륨을 함유하는 안정화제 염의 수용액을 pH가 일정하게 유지된 암모니아 수용액에 침전시켜 침전물을 수용액으로부터 분리한 다음, 수세하고, 이를 물과 함께 끓는 혼합물을 형성시키는 유기용매에 분산시켜 함께 끓는 증류를 행함으로써 미립자 표면에 흡착 응축된 수분을 제거한 후, 지르코늄을 함유하는 미립자를 유기용매로부터 500∼1200℃의 온도에서 열처리하는 것을 특징으로 하는 안정화 지르코니아 분말의 제조방법.
  2. 제1항에 있어서, 6∼12의 pH범위에서 침전시키는 것을 특징으로하는 안정화 지르코니아 분말의 제조방법.
  3. 제1항에 있어서, 침전완료 후 침전용액을 10분 내지 5시간동안 반응시키는 것을 특징으로 하는 안정화 지르코니아 분말의 제조방법.
  4. 제1항에 있어서, 유기용매는 nㅡ부탄올 또는 톨루엔인 것을 특징으로 하는 안정화 지르코니아 분말의 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.
KR1019940008360A 1994-04-20 1994-04-20 안정화 지르코니아 분말의 제조방법 KR960012723B1 (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940008360A KR960012723B1 (ko) 1994-04-20 1994-04-20 안정화 지르코니아 분말의 제조방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940008360A KR960012723B1 (ko) 1994-04-20 1994-04-20 안정화 지르코니아 분말의 제조방법

Publications (2)

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KR950029231A true KR950029231A (ko) 1995-11-22
KR960012723B1 KR960012723B1 (ko) 1996-09-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040044024A (ko) * 2002-11-20 2004-05-27 한국과학기술연구원 나노 크기 Ｙ₂Ｏ₃가 첨가된 ＺｒＯ₂분말의 제조방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040044024A (ko) * 2002-11-20 2004-05-27 한국과학기술연구원 나노 크기 Ｙ₂Ｏ₃가 첨가된 ＺｒＯ₂분말의 제조방법

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