JP2014520064A - シリカドープしたアルミナ微粒子材料 - Google Patents
シリカドープしたアルミナ微粒子材料 Download PDFInfo
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- JP2014520064A JP2014520064A JP2014517260A JP2014517260A JP2014520064A JP 2014520064 A JP2014520064 A JP 2014520064A JP 2014517260 A JP2014517260 A JP 2014517260A JP 2014517260 A JP2014517260 A JP 2014517260A JP 2014520064 A JP2014520064 A JP 2014520064A
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- particulate material
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- liquid chromatography
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- 239000011236 particulate material Substances 0.000 title claims abstract description 141
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 48
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000002245 particle Substances 0.000 claims abstract description 73
- 239000011148 porous material Substances 0.000 claims abstract description 60
- 239000000463 material Substances 0.000 claims abstract description 48
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 46
- 239000011163 secondary particle Substances 0.000 claims abstract description 43
- 239000002019 doping agent Substances 0.000 claims abstract description 40
- 239000011164 primary particle Substances 0.000 claims abstract description 33
- 238000000034 method Methods 0.000 claims description 44
- 239000003054 catalyst Substances 0.000 claims description 37
- 238000004128 high performance liquid chromatography Methods 0.000 claims description 35
- 229920000642 polymer Polymers 0.000 claims description 34
- 239000000725 suspension Substances 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 22
- 239000012798 spherical particle Substances 0.000 claims description 15
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 13
- 229910001593 boehmite Inorganic materials 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 10
- 239000003929 acidic solution Substances 0.000 claims description 7
- 238000010335 hydrothermal treatment Methods 0.000 claims description 7
- 239000002243 precursor Substances 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000010306 acid treatment Methods 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 239000008367 deionised water Substances 0.000 claims description 2
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims 7
- 239000011859 microparticle Substances 0.000 claims 2
- 238000010304 firing Methods 0.000 claims 1
- 238000009830 intercalation Methods 0.000 claims 1
- 238000003917 TEM image Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000011068 loading method Methods 0.000 description 5
- 239000008119 colloidal silica Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- FBEHFRAORPEGFH-UHFFFAOYSA-N Allyxycarb Chemical compound CNC(=O)OC1=CC(C)=C(N(CC=C)CC=C)C(C)=C1 FBEHFRAORPEGFH-UHFFFAOYSA-N 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000002356 laser light scattering Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
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Abstract
【選択図】図1
Description
微粒子材料は、前駆体、シードおよびシリカドーパントを使用して調製される。微粒子材料は乾燥およびか焼される。サンプルはSSA、孔体積および孔サイズについて試験され、結果は表2中で示される。
様々な粒子サイズを備えたコロイダルシリカがCAM合成における添加剤として用いられた時に、シリカドープしたCAMの表面積および孔体積はシリカ粒子サイズと直線的に相関していることが見出された。より小さな粒子サイズを備えたコロイダルシリカはより高い表面積およびより大きな孔体積をもたらす。
上で提示された実験データに基づいて、Nalco2326はさらなる試験のために選択された。最適のシリカドーピングレベルを決定するために、1シリーズの実験をデザインし、1.5〜10パーセントでシリカドーパントパーセンテージを変動することによって実行した。
Claims (62)
- アルミナ材料と;
シリカドーパントとを含み、
微粒子材料が約10nm未満の結晶子粒子サイズを備えた結晶子粒子を含み、結晶子粒子がともに積み重ねられて約500nm未満の一次粒子サイズを備えた一次粒子を形成し、一次粒子がともに集塊して約1μmを超える二次粒子サイズを備えた二次粒子を形成し、微粒子材料が8nm以上の平均孔径を有する、
微粒子材料。 - 請求項1に記載の微粒子材料を含む、触媒担体。
- 請求項1に記載の微粒子材料を含む、高圧液体クロマトグラフィー(HPLC)カラム。
- 請求項1に記載の微粒子材料を含む、ポリマー充填剤。
- 前記一次粒子がロッド形状の粒子を含む、請求項1〜4のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記二次粒子が球状粒を形成する、請求項1〜5のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記球状粒が、約1.5μm〜約8μm(約2μm〜約7μmの範囲、約2μm〜約6μmの範囲、約2.5μm〜約5.5μmの範囲、または約3μm〜約5μmの範囲等)の範囲中の中央直径を有する、請求項6に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記ロッド形状の粒子が約2:1を超える一次アスペクト比を有する、請求項5に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記ロッド形状の粒子が約2:1未満の二次アスペクト比を有する、請求項5に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記二次アスペクト比が約1:1である、請求項9に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記平均孔径が、9nm以上(10nm以上、11nm以上、12nm以上、13nm以上、14nm以上、または15nm以上等)である、請求項1〜10のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記平均孔径が50nm未満(30nm未満等)である、請求項11に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記アルミナ材料が水和アルミナ(ベーマイト等)を含む、請求項1〜12のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記アルミナ材料が非水和アルミナ(γアルミナ等)を含む、請求項1〜13のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 10nmと50nmの間の孔径を備えた孔が微粒子材料の全孔体積のうちの少なくとも90%を提供する、請求項1〜14のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、150m2/g以上(200m2/g以上、210m2/g以上、220m2/g以上、230m2/g以上、または240m2/g以上等)の比表面積を有する、請求項1〜15のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、0.5mL/g以上(1.0mL/g以上、1.5mL/g以上、1.8mL/g以上、または2.0mL/g以上等)の全孔体積を有する、請求項1〜16のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記一次粒子サイズが、約100nm〜500nmの範囲中(約100nm〜約400nmの範囲中、約150nm〜約300nmの範囲中、または約150nm〜約250nmの範囲中等)である、請求項1〜17のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記二次粒子のうちの少なくとも80パーセントの二次粒子サイズが、約1.5μm〜8μmの範囲(約1.6μm〜約7μmの範囲、約1.7μm〜約6μmの範囲、約1.8μm〜約5μmの範囲、または約1.9μm〜約4.6μmの範囲等)中である、請求項1〜18のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記二次粒子のうちの少なくとも40パーセントの二次粒子サイズが、約1.5μm〜5μmの範囲(約1.6μm〜約4.5μmの範囲、約1.7μm〜約4μmの範囲、約1.8μm〜約3.5μmの範囲、または約1.9μm〜約3.4μmの範囲等)中である、請求項19に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記二次粒子のうちの少なくとも40パーセントの二次粒子サイズが、約2μm〜8μmの範囲(約2.4μm〜約7μmの範囲、約2.5μm〜約6μmの範囲、約2.6μm〜約5μmの範囲、または約2.7μm〜約4.6μmの範囲等)中である、請求項19に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記シリカドーパントの平均粒子サイズが、約20nm未満(約12nm未満、約10nm未満、約8nm未満、または約6nm未満等)である、請求項1〜21のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記アルミナ材料対前記シリカドーパントの比が重量で約75:25を超える(重量で約85:15を超える、重量で約90:10を超える、重量で約91:9を超える、重量で約92:8を超える、または重量で約93:7を超える等)、請求項1〜22のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記シリカドーパントがアルミナ材料中に均質に分布する、請求項1〜23のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、25パーセント以下(20パーセント以下、または15パーセント以下等)の熱水安定性指標を有し、そこで熱水安定性指標が、約650℃の温度で3時間の期間の間か焼することおよび約220℃の温度で16時間の期間の間熱水熱処理を実行することの後の微粒子材料の比表面積における変化を示す、請求項1〜24のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、5パーセント以下(2パーセント以下、または1.5パーセント以下等)の熱水安定性指標を有し、そこで熱水安定性指標が、約650℃の温度で3時間の期間の間か焼することおよび約220℃の温度で16時間の期間の間熱水熱処理を実行することの後の微粒子材料の孔体積における変化を示す、請求項1〜25のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、25パーセント以下(20パーセント以下、または15パーセント以下等)の熱水安定性指標を有し、そこで熱水安定性指標が、約650℃の温度で3時間の期間の間か焼することおよび約220℃の温度で16時間の期間の間熱水熱処理を実行することの後の平均孔径における変化を示す、請求項1〜26のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、15ppm/m2未満の酸耐性指標を有し、そこで酸耐性指標が、約650℃の温度で3時間の期間の間か焼することおよび微粒子材料に対して約pH2で25時間の間酸処理を実行することの後の溶解されたアルミナを示す、請求項1〜27のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 前記微粒子材料が、0.5ppm/m2未満の酸耐性指標を有し、そこで酸耐性指標が、約650℃の温度で3時間の期間の間か焼することおよび微粒子材料に対して約pH2で25時間の間酸処理を実行することの後の溶解されたシリカを示す、請求項1〜28のいずれか一項に記載の微粒子材料、触媒担体、高圧液体クロマトグラフィーカラムまたはポリマー充填剤。
- 懸濁物中で前駆体材料、シードおよびシリカドーパントを提供することと;
微粒子材料を形成し、微粒子材料がアルミナ材料およびシリカドーパントを含み、微粒子材料の形成が懸濁物の熱水処理を含むこととを含むプロセスによって形成され、
微粒子材料が約10nm未満の結晶子粒子サイズを備えた結晶子粒子を含み、結晶子粒子がともに積み重ねられて約500nm未満の一次粒子サイズを備えた一次粒子を形成し、一次粒子がともに集塊して約1μmを超える二次粒子サイズを備えた二次粒子を形成し、微粒子材料が8nm以上の平均孔径を有する、
微粒子材料。 - 懸濁物中で前駆体材料、シードおよびシリカドーパントを提供することと;
アルミナ材料およびシリカドーパントを含む微粒子材料を形成し、微粒子材料の形成が懸濁物の熱水処理を含むこととを含み、
微粒子材料が約10nm未満の結晶子粒子サイズを備えた結晶子粒子を含み、結晶子粒子がともに積み重ねられて約500nm未満の一次粒子サイズを備えた一次粒子を形成し、一次粒子がともに集塊して約1μmを超える二次粒子サイズを備えた二次粒子を形成し、微粒子材料が8nm以上の平均孔径を有する、
方法。 - 前記微粒子材料の形成が、
懸濁物の熱水処理後に懸濁物を乾燥させて乾燥ゲルを形成することと;
乾燥ゲルを粉砕することと
をさらに含むことを特徴とする請求項30および請求項31のいずれか一項に記載の微粒子材料または方法。 - 前記懸濁物が水溶液を含む、請求項30〜32のいずれか一項に記載の微粒子材料または方法。
- 前記水溶液が酸性溶液である、請求項33に記載の微粒子材料または方法。
- 前記酸性溶液が脱イオン水および硝酸の混合物を含む、請求項34に記載の微粒子材料または方法。
- 前記シリカドーパントが前記酸性溶液に添加される、請求項34に記載の微粒子材料または方法。
- 前記シードが、前記シリカドーパントが添加された後に前記酸性溶液に添加される、請求項36に記載の微粒子材料または方法。
- 前記シードがベーマイトを含む、請求項37に記載の微粒子材料または方法。
- 前記懸濁物が、約120℃を超える(約125℃を超える、約130℃を超える、または約150℃を超える等)温度でオートクレーブ中で熱水で処理される、請求項30〜38のいずれか一項に記載の微粒子材料または方法。
- 前記温度が、約300℃未満(約250℃未満等)である、請求項39に記載の微粒子材料または方法。
- 前記懸濁物が、1時間を超える(2時間を超えるまたは3時間を超える等)期間の間熱水で処理される、請求項39に記載の微粒子材料または方法。
- 前記期間が24時間未満である、請求項30〜41のいずれか一項に記載の微粒子材料または方法。
- 前記懸濁物が自己生成的に生成される圧力で熱水で処理される、請求項39に記載の微粒子材料または方法。
- 前記一次粒子がロッド形状の粒子を含む、請求項30〜43のいずれか一項に記載の微粒子材料または方法。
- 前記二次粒子が球状粒を形成する、請求項30〜44のいずれか一項に記載の微粒子材料または方法。
- 前記球状粒が、約1.5μm〜約8μmの範囲(約2μm〜約7μmの範囲、約2μm〜約6μmの範囲、約2.5μm〜約5.5μmの範囲、または約3μm〜約5μmの範囲等)中である中央直径を有する、請求項45に記載の微粒子材料または方法。
- 前記ロッド形状の粒子が約2:1を超える一次アスペクト比を有する、請求項44に記載の微粒子材料または方法。
- 前記ロッド形状の粒子が約2:1未満の二次アスペクト比を有する、請求項44に記載の微粒子材料または方法。
- 前記二次アスペクト比が約1:1である、請求項48に記載の微粒子材料または方法。
- 前記平均孔径が、9nm以上(10nm以上、11nm以上、12nm以上、13nm以上、14nm以上、または15nm以上等)である、請求項30〜49のいずれか一項に記載の微粒子材料または方法。
- 前記平均孔径が、50nm未満(30nm未満等)である、請求項50に記載の微粒子材料または方法。
- 前記アルミナ材料が水和アルミナ(ベーマイト等)を含む、請求項30〜51のいずれか一項に記載の微粒子材料または方法。
- 前記アルミナ材料が非水和アルミナ(γアルミナ等)を含む、請求項30〜52のいずれか一項に記載の微粒子材料または方法。
- 10nmと50nmの間の孔径を備えた孔が微粒子材料の全孔体積の少なくとも90%を提供する、請求項30〜53のいずれか一項に記載の微粒子材料または方法。
- 前記微粒子材料が、150m2/g以上(200m2/g以上、210m2/g以上、220m2/g以上、230m2/g以上、または240m2/g以上等)の比表面積を有する、請求項30〜54のいずれか一項に記載の微粒子材料または方法。
- 前記微粒子材料が、0.5mL/g以上(1.0mL/g以上、1.5mL/g以上、1.8mL/g以上、または2.0mL/g以上等)の全孔体積を有する、請求項30〜55のいずれか一項に記載の微粒子材料または方法。
- 前記一次粒子サイズが、約100nm〜500nmの範囲中(約100nm〜約400nmの範囲中、約150nm〜約300nmの範囲中、または約150nm〜約250nmの範囲中等)である、請求項30〜56のいずれか一項に記載の微粒子材料または方法。
- 前記二次粒子の少なくとも80パーセントの二次粒子サイズが、約1.5μm〜約8μmの範囲(約1.6μm〜約7μmの範囲、約1.7μm〜約6μmの範囲、約1.8μm〜約5μmの範囲、または約1.9μm〜約4.6μmの範囲等)中である、請求項30〜57のいずれか一項に記載の微粒子材料または方法。
- 前記二次粒子の少なくとも40パーセントの二次粒子サイズが、約1.5μm〜約5μmの範囲(約1.6μm〜約4.5μmの範囲、約1.7μm〜約4μmの範囲、約1.8μm〜約3.5μmの範囲、または約1.9μm〜約3.4μmの範囲等)中である、請求項58に記載の微粒子材料または方法。
- 前記二次粒子の少なくとも40パーセントの二次粒子サイズが、約2μm〜約8μmの範囲(約2.4μm〜約7μmの範囲、約2.5μm〜約6μmの範囲、約2.6μm〜約5μmの範囲、または約2.7μm〜約4.6μmの範囲等)中である、請求項58に記載の微粒子材料または方法。
- 前記シリカドーパントの平均粒子サイズが、約20nm未満(約12nm未満、約10nm未満、約8nm未満、または約6nm未満等)である、請求項30〜60のいずれか一項に記載の微粒子材料または方法。
- 前記アルミナ材料対前記シリカドーパントの比が、重量で約75:25を超える(重量で約85:15を超える、重量で約90:10を超える、重量で約91:9を超える、重量で約92:8を超える、または重量で約93:7を超える等)、請求項30〜61のいずれか一項に記載の微粒子材料または方法。
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EP (1) | EP2726415A4 (ja) |
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EP2726415A4 (en) | 2015-07-29 |
CN103608290B (zh) | 2016-08-24 |
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