JP6198947B2 - 低温膨張性チタン酸アルミニウム−ジルコニウム・スズ・チタネートセラミックス - Google Patents
低温膨張性チタン酸アルミニウム−ジルコニウム・スズ・チタネートセラミックス Download PDFInfo
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- JP6198947B2 JP6198947B2 JP2016521501A JP2016521501A JP6198947B2 JP 6198947 B2 JP6198947 B2 JP 6198947B2 JP 2016521501 A JP2016521501 A JP 2016521501A JP 2016521501 A JP2016521501 A JP 2016521501A JP 6198947 B2 JP6198947 B2 JP 6198947B2
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- titanate
- zirconium
- tin
- cte
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- 239000000919 ceramic Substances 0.000 title claims description 129
- 229910052782 aluminium Inorganic materials 0.000 title description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 108
- 239000010936 titanium Substances 0.000 claims description 65
- 229910052719 titanium Inorganic materials 0.000 claims description 50
- 229910052726 zirconium Inorganic materials 0.000 claims description 50
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 43
- 239000013078 crystal Substances 0.000 claims description 34
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 30
- XNFDWBSCUUZWCI-UHFFFAOYSA-N [Zr].[Sn] Chemical compound [Zr].[Sn] XNFDWBSCUUZWCI-UHFFFAOYSA-N 0.000 claims description 29
- 239000011777 magnesium Substances 0.000 claims description 20
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 17
- 229910052749 magnesium Inorganic materials 0.000 claims description 17
- 239000004575 stone Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000012071 phase Substances 0.000 description 181
- 239000000203 mixture Substances 0.000 description 56
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 37
- 229910052593 corundum Inorganic materials 0.000 description 34
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- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 21
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- 238000010438 heat treatment Methods 0.000 description 14
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- 150000001875 compounds Chemical class 0.000 description 5
- 229910052878 cordierite Inorganic materials 0.000 description 5
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 5
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- UNYSKUBLZGJSLV-UHFFFAOYSA-L calcium;1,3,5,2,4,6$l^{2}-trioxadisilaluminane 2,4-dioxide;dihydroxide;hexahydrate Chemical compound O.O.O.O.O.O.[OH-].[OH-].[Ca+2].O=[Si]1O[Al]O[Si](=O)O1.O=[Si]1O[Al]O[Si](=O)O1 UNYSKUBLZGJSLV-UHFFFAOYSA-L 0.000 description 4
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- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
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- 229920000609 methyl cellulose Polymers 0.000 description 2
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- 239000010955 niobium Substances 0.000 description 2
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
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- 239000011591 potassium Substances 0.000 description 2
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- BFHKYHMIVDBCPC-UHFFFAOYSA-N 1,3,5,7-tetrahydro-[1,3]oxazolo[3,4-c][1,3]oxazol-7a-ylmethanol Chemical compound C1OCN2COCC21CO BFHKYHMIVDBCPC-UHFFFAOYSA-N 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/14—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of germanium, tin or lead
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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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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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Description
方程式1:S=2140−18.1(%多孔率)−57.2(d50)+6.1(CTERT−1000℃)
式中、d50は、マイクロメートルの単位でのセラミック素地の細孔径の中央値であり、%多孔率は多孔率の容積百分率であり、これらはいずれも水銀ポロシメトリーにより測定され、そしてCTERT−1000℃は、10−7℃−1の単位での、膨張率測定により測定される室温(およそ22℃)〜1000℃の熱膨張係数の平均である。特定の実施形態では、「S」の算出値に対する測定した曲げ強度の比(MOR/S)は、少なくとも約1.05、少なくとも約1.10、少なくとも約1.15、少なくとも約1.20、及び少なくとも約1.25でさえある。高いMOR/Sの値は、セラミック素地が望ましいことに、%多孔率、細孔径の中央値及び熱膨張係数に関する値の所定のセットにおいて特に高い強度を有することを意味する。
実施例1〜30において以下で議論するセラミック素地を調製する前に、ZrO2−TiO2−SnO2系の組成の1つのシリーズを1500℃及び1600℃の温度で合成して、これらの温度での三成分系中のZrTiO4固溶体の限界を定義し、組成の関数として単位セルの寸法及び熱膨張の格子係数の変化を定量化した。メチルセルロースと混ぜ合わせ、ステンレス鋼製の混和機の中での水の添加により可塑化した、端成分である酸化物の粉末の混合物から試料を調製した。その後、これらの材料をラム押出機を使用して8mmの直径の桿として押し出し成形し、乾燥し、50℃/hでの加熱、最高温度での10時間の保持、500℃/hでの冷却により電気炉の中で焼成した。焼成した材料中の相及びそれらの重量百分率を、データのリートベルト法を使用して粉末x線回折計により決定した。
方程式2:「a」単位セルの寸法(オングストローム)=4.56705+0.239524(Zr)+0.061806(Sn)
98.5% R2
方程式3:「b」単位セルの寸法(オングストローム)=5.07079+0.21806(Zr)+0.707332(Sn)−0.321695(Sn)2+0.13948(Ti)2
99.8% R2
方程式4:「c」単位セルの寸法(オングストローム)=5.25636−0.0489722(Zr)−0.182123(Ti)
99.8% R2
以下の表1は、室温でのa、b及びcの単位セルの寸法の値、並びに室温から1000℃までのa、b及びc単位セル寸法の熱膨張の格子係数の平均、並びに、チタン酸ジルコニウム及び様々なジルコニウム・スズ・チタネート化合物に関する3つの格子CTE値の平均を示す。組成は4個の酸素処方単位あたりの原子数により示し、CTE値は10−7℃−1の単位である。
チタン酸アルミニウム+ジルコニウム・スズ・チタネート又はチタン酸マグネシウムアルミニウム+ジルコニウム・スズ・チタネートをベースとする本明細書中で開示する実施形態の実施例、及びチタン酸アルミニウム±スズ非含有チタン酸ジルコニウム又はチタン酸マグネシウムアルミニウム±スズ非含有チタン酸ジルコニウムをベースとする比較例を、以下の表2〜6に示す。
酸化銅の存在下での3種類のチタン酸アルミニウム系セラミック素地の安定性を、本発明の実施例14及び17について、また、マグネシウム非含有チタン酸アルミニウム+コランダム+SrAl2Si2O8からなるセラミックについても、1100℃で評価した。結果を表7に提供する。これは、粉砕したセラミックを0.25wt%の酸化銅(II)と混合し、1100℃で2時間加熱する前及び後の、相の百分率並びにそれらの単位セルの寸法及び容積を示す。実施例14Bのマグネシウム非含有チタン酸アルミニウム+ジルコニウム・スズ・チタネートセラミックは、酸化銅を伴う熱処理後は擬板チタン石型相を実質的には含有せず、コランダム+ルチルに分解したチタン酸アルミニウムを含む。対照的に、擬板チタン石相がおよそ92モル%のAl2TiO5と8モル%のMgTi2O5からなる実施例17Bは、試験後のセラミック中に最初に存在していた擬板チタン石の92%を保持しており、これは酸化銅の存在下での本発明のセラミックスの安定性に対するマグネシウムの利点を示している。擬板チタン石相を安定化させるためにケイ素の存在に頼る実施例30は、銅の存在下での熱処理後は、最初のチタン酸アルミニウム相のうちの僅か32%しか保持していなかった。
Claims (6)
- (i)擬板チタン石型結晶構造を含む少なくとも1つの相と、(ii)ジルコニウム・スズ・チタネートを含む少なくとも1つの相とを含む、多孔質セラミックハニカム構造体。
- 前記少なくとも1つの擬板チタン石型結晶構造は、マグネシウム含有Al2TiO5を含む、請求項1に記載の多孔質セラミックハニカム構造体。
- ジルコニウム・スズ・チタネートを含む前記少なくとも1つの相は、式(Al)p1(Zr)q1(Ti)q2(Sn)q3O4−0.5(p1)のものであり、ここで:
(p1+q1+q2+q3)=2であり;
p1は0〜0.08であり;
q1/(q1+q2+q3)の値は0.36〜0.60であり;
q2/(q1+q2+q3)の値は0.23〜0.50であり;及び
q3/(q1+q2+q3)の値は0.05〜0.33である、請求項1又は2に記載の多孔質セラミックハニカム構造体。 - 比MOR/Sは1.0超であり、
MORは、ポンド毎平方インチの単位で4点法によって測定され、
S=2140−18.1(%多孔率)−57.2(d50)+6.1(CTERT−1000℃)であり、
d50はマイクロメートル単位であり、
CTEは10−7℃−1の単位である、請求項1〜3のいずれか1項に記載の多孔質セラミックハニカム構造体。 - 少なくとも45%の多孔率を有する、請求項1〜4のいずれか1項に記載の多孔質セラミックハニカム構造体。
- CTERT−1000℃は30×10−7℃−1未満である、請求項1〜5のいずれか1項に記載の多孔質セラミックハニカム構造体。
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US13/920,493 US9339791B2 (en) | 2013-06-18 | 2013-06-18 | Low thermal expansion aluminum titanate zirconium tin titanate ceramics |
PCT/US2014/042659 WO2014204915A1 (en) | 2013-06-18 | 2014-06-17 | Low thermal expansion aluminum titanate -zirconium tin titanate ceramics |
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US4758542A (en) * | 1987-02-13 | 1988-07-19 | W. R. Grace & Co. | Low thermal expansion ZrTiO4 --Al2 TiO5 --ZrO2 compositions |
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