JP5380707B2 - 柱状チタン酸アルミニウム及びその製造方法並びにハニカム構造体 - Google Patents
柱状チタン酸アルミニウム及びその製造方法並びにハニカム構造体 Download PDFInfo
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- JP5380707B2 JP5380707B2 JP2009138034A JP2009138034A JP5380707B2 JP 5380707 B2 JP5380707 B2 JP 5380707B2 JP 2009138034 A JP2009138034 A JP 2009138034A JP 2009138034 A JP2009138034 A JP 2009138034A JP 5380707 B2 JP5380707 B2 JP 5380707B2
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- Prior art keywords
- aluminum titanate
- columnar
- honeycomb structure
- aluminum
- number average
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 229910000505 Al2TiO5 Inorganic materials 0.000 title claims description 73
- 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 title claims description 73
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 45
- 238000001125 extrusion Methods 0.000 claims description 35
- 239000013078 crystal Substances 0.000 claims description 24
- 239000010936 titanium Substances 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052719 titanium Inorganic materials 0.000 claims description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 239000011777 magnesium Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 31
- 238000005259 measurement Methods 0.000 description 23
- 238000002441 X-ray diffraction Methods 0.000 description 22
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 19
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 17
- 239000002245 particle Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 11
- 238000010298 pulverizing process Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 229910052814 silicon oxide Inorganic materials 0.000 description 8
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 7
- 239000000347 magnesium hydroxide Substances 0.000 description 7
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 7
- 238000005245 sintering Methods 0.000 description 7
- 238000010191 image analysis Methods 0.000 description 6
- 239000011812 mixed powder Substances 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000000395 magnesium oxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 238000011002 quantification Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002270 dispersing agent Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 229930195729 fatty acid Natural products 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 1
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000010944 ethyl methyl cellulose Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003087 methylethyl cellulose Polymers 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
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Description
A:ハニカム押出方向のC軸配向度=I002/(I002+I 230 )
B:ハニカム垂直方向のC軸配向度=I002/(I002+I230)
(実施例1)
酸化チタン319.5g、酸化アルミニウム442.2g、水酸化マグネシウム17.3g及び酸化ケイ素19.2gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン305.6g、酸化アルミニウム459.7g、水酸化マグネシウム16.4g及び酸化ケイ素18.4gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン328.4g、酸化アルミニウム434.2g、水酸化マグネシウム17.6g及び酸化ケイ素19.7gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン334.7g、酸化アルミニウム427.3g、水酸化マグネシウム17.9g及び酸化ケイ素20.1gを振動ミルにて粉砕しながら、2.0時間混合した。
酸化チタン292.9g、酸化アルミニウム473.9g、水酸化マグネシウム15.7g及び酸化ケイ素17.6gを振動ミルにて粉砕しながら、2.0時間混合した。
実施例1で得られた柱状チタン酸アルミニウムを自動乳鉢にて50時間粉砕処理し、粒状のチタン酸アルミニウムを得た。
実施例1で得られたチタン酸アルミニウムについて、走査型電子顕微鏡で観察した。図1は、このチタン酸アルミニウムを示す走査型電子顕微鏡写真(倍率1000倍)である。図1から明らかなように、柱状のチタン酸アルミニウムが得られている。
上記各実施例及び各比較例で得られたチタン酸アルミニウムを用いて、以下のようにしてハニカム焼結体を製造した。
得られた各ハニカム焼結体について気孔率、曲げ強度、熱膨張係数、及び結晶配向比を以下のようにして測定した。
図8は、ハニカム焼結体(ハニカム構造体)を示す斜視図である。図8に示すように、ハニカム焼結体1は、8×8セルを有し、端面1aは、縦1.8cm、横1.8cmの大きさを有している。矢印Aは、押出方向を示しており、矢印Bは押出方向Aに対し垂直な方向を示している。
図10に示すように、上記の8×8セルのハニカム焼結体1を、支持点11及び12に支持した状態で、焼結体1の中心部を押圧棒10で押圧することにより、JIS R1601に準拠して、曲げ強度を測定した。
図8及び図9を参照して説明した、気孔率の測定サンプル3と同様にして、8×8セルのハニカム焼結体1の中心部2から、押出方向Aに沿う長さが2cm程度となるように切り出し、測定サンプル3とした。図11に示すように、測定サンプル3の押出方向Aにおける線膨張係数を、JIS R1618に準拠して測定した。
得られたハニカム焼結体についてのC軸結晶配向比を、結晶配向比とした測定した。
1a…ハニカム構造体の端面
2…ハニカム構造体の中心部
3…ハニカム構造体から切り出した測定サンプル
4…ハニカム構造体の端面近傍の領域
5…ハニカム構造体の押出面をX線回折測定するためのサンプル
5a…押出面
6…ハニカム構造体の8×2セルの領域
7…ハニカム構造体の垂直面をX線回折測定するためのサンプル
7a…垂直面
Claims (4)
- 平均アスペクト比(=個数平均長軸径/個数平均短軸径)が1.3以上の柱状チタン酸アルミニウムであって、柱状チタン酸アルミニウムに対し、2〜10重量%の酸化アルミニウムが表面に付着していることを特徴とする柱状チタン酸アルミニウム。
- 個数平均短軸径が、10μm以下であることを特徴とする請求項1に記載の柱状チタン酸アルミニウム。
- 請求項1または2に記載の柱状チタン酸アルミニウムを製造する方法であって、
チタン源、アルミニウム源、及びマグネシウム源を含む原料をメカノケミカルに粉砕しながら混合する工程と、
粉砕した混合物を焼成する工程とを備えることを特徴とする柱状チタン酸アルミニウムの製造方法。 - 請求項1または2に記載の柱状チタン酸アルミニウムを用いて作製したハニカム構造体であって、
ハニカム構造体の押出方向の30〜800℃の間の熱膨張係数が0.5×10−6/℃以下であり、ハニカム押出方向に対するC軸の結晶配向比が0.75以上であることを特徴とするハニカム構造体。
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