JP7255940B2 - 放射冷却のための赤外線選択的ナノ機能性組成物及びその製造方法 - Google Patents
放射冷却のための赤外線選択的ナノ機能性組成物及びその製造方法 Download PDFInfo
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- 238000001354 calcination Methods 0.000 claims description 3
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- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 2
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- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims description 2
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- BIOOACNPATUQFW-UHFFFAOYSA-N calcium;dioxido(dioxo)molybdenum Chemical compound [Ca+2].[O-][Mo]([O-])(=O)=O BIOOACNPATUQFW-UHFFFAOYSA-N 0.000 description 15
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- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 6
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- 238000000295 emission spectrum Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
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- YZDZYSPAJSPJQJ-UHFFFAOYSA-N samarium(3+);trinitrate Chemical compound [Sm+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O YZDZYSPAJSPJQJ-UHFFFAOYSA-N 0.000 description 1
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Description
(a)希土類ケイ酸塩化合物の化学量論比に基づき、ナノシリカ、希土類硝酸塩及び硝酸ナトリウムを正確に秤量し、エタノール・水混合溶液中に混合分散させ、水浴撹拌条件で溶媒を蒸発させてゲルを得、120~150℃にて3~6時間の低温仮焼処理を行ってから、600~900℃にて3~12時間熱処理して希土類ケイ酸塩化合物を得るステップと、
(b)モリブデン酸塩化合物の化学量論比に基づき、モリブデン酸アンモニウム及びアルカリ土類金属硝酸塩を正確に秤量した後に脱イオン水に溶解して溶液とし、クエン酸溶液を調製し、上記溶液に滴下し、滴下しながら激しく撹拌し、pHを3.0~4.0に調整し、水浴撹拌条件で溶媒を蒸発させてゲルを得、120~150℃にて3~6時間の低温仮焼処理を行ってから、800~1000℃にて3~12時間熱処理し、モリブデン酸塩化合物を得るステップと、
(c)ナノ機能性組成物の質量比に基づき、一定量のナノシリカ、希土類ケイ酸塩化合物及びモリブデン酸塩化合物を秤量し、高速研削分散機で処理し、放射冷却のための赤外線選択的ナノ機能性組成物を得るステップと、を含む上記放射冷却のための赤外線選択的ナノ機能性組成物の製造方法を更に提供する。
本発明は8~10μmの範囲内に高い赤外線選択的放射特性を有するナノシリカ、9~12μmの範囲内に高い赤外線選択的放射特性を有する希土類ケイ酸塩化合物、及び10~14μmの範囲内に高い赤外線選択的放射特性を有するモリブデン酸塩化合物を組み合わせて、紫外線-可視光-近赤外線太陽光を透過可能で8~14μmの赤外線の大気の窓で高い赤外線選択的放射冷却特性を有するナノ機能性組成物を得、夜間と昼間の二重効果による高性能の放射冷却器、自己放射冷却コーティング等の低コスト大量生産において技術的難易度を低下させ、建築物、穀倉と油倉、高出力電子機器、及び冷蔵庫と冷蔵包装等におけるゼロエネルギー消費の冷却・降温、及び大規模なエネルギー節約と効率向上に新たな技術的アプローチを提供する。
(a)希土類ケイ酸ランタン化合物の化学量論比SiO2-La2O3-0.5Na2Oに基づき、30gのナノシリカ(50nm、市販)、324.9gの硝酸ランタン及び85gの硝酸ナトリウムを正確に秤量し、エタノール・水混合溶液に溶解し、70℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、120℃にて6時間熱処理して希土類ケイ酸ランタンの仮焼粉を得、700℃にて12時間熱処理して平均粒度が106nmの希土類ケイ酸ランタン化合物を得る。
(b)モリブデン酸カルシウムの化学式CaMoO4に基づき、82gの硝酸カルシウム及び170gの二モリブデン酸アンモニウムを正確に秤量し、脱イオン水に溶解する。8%のクエン酸溶液を調製し、上記溶液に1滴ずつ滴下し、滴下しながら激しく撹拌し、アンモニア水でpHを3.5に調整し、70℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、150℃にて6時間熱処理してモリブデン酸カルシウムの仮焼粉を得、900℃にて6時間熱処理して平均粒度が103nmのモリブデン酸カルシウムを得る。
(c)機能性粉体組成物の重量比1:1:1に基づき、40gのナノシリカ(50nm、市販)、40gのステップ(a)で得た希土類ケイ酸ランタン化合物、及び40gのステップ(b)で得たモリブデン酸カルシウムをそれぞれ秤量し、併せて高速研削分散機のボールミルポットに加え、ボールミルの回転速度を300回転/分間とし、ボールミルの粉砕時間を6時間とし、所要の放射冷却のための赤外線選択的ナノ機能性組成物を得る。得られたナノ機能性組成物は8~14μmの赤外線波長範囲での吸収/放射率が最高0.90に達する。その赤外線選択的吸収/放射スペクトルは図1に示されるとおりである。
(a)希土類ケイ酸ランタン化合物の化学量論比SiO2-1.5Sm2O3-0.25Na2Oに基づき、24gのナノシリカ(50nm、市販)、134.5gの硝酸サマリウム及び42.5gの硝酸ナトリウムを正確に秤量し、エタノール・水混合溶液に溶解し、70℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、150℃にて3時間熱処理して希土類ケイ酸ランタンの仮焼粉を得、900℃にて3時間熱処理して平均粒度が115nmの希土類ケイ酸ランタン化合物を得る。
(b)モリブデン酸カルシウムの化学式MgMoO4に基づき、72.2gの硝酸マグネシウム及び85gの二モリブデン酸アンモニウムを正確に秤量し、脱イオン水に溶解する。10%クエン酸溶液を調製し、上記溶液に1滴ずつ滴下し、滴下しながら激しく撹拌し、アンモニア水でpHを3.0に調整し、80℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、120℃にて6時間熱処理してモリブデン酸カルシウムの仮焼粉を得、1000℃にて3時間熱処理して平均粒度が103nmのモリブデン酸カルシウムを得る。
(c)機能性粉体組成物の重量比1:1.5:0.5に基づき、40gのナノシリカ(50nm、市販)、60gのステップ(a)で得た希土類ケイ酸ランタン化合物及び15gのステップ(b)で得たモリブデン酸カルシウムをそれぞれ秤量し、併せて高速研削分散機のボールミルポットに加え、ボールミルの回転速度を350回転/分間とし、ボールミルの粉砕時間を4時間とし、所要の放射冷却のための赤外線選択的ナノ機能性組成物を得る。得られたナノ機能性組成物は8~14μmの赤外線波長範囲での吸収/放射率が最高0.89に達する。
(a)希土類ケイ酸ランタン化合物の化学量論比SiO2-1.5La2O3-0.5Na2Oに基づき、30gのナノシリカ(30nm、市販)、487.4gの硝酸ランタン及び42.5gの硝酸ナトリウムを正確に秤量し、エタノール・水混合溶液に溶解し、80℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、120℃にて6時間熱処理して希土類ケイ酸ランタンの仮焼粉を得、650℃にて12時間熱処理して平均粒度が94nmの希土類ケイ酸ランタン化合物を得る。
(b)モリブデン酸カルシウムの化学式CaMoO4に基づき、82gの硝酸カルシウム及び170gの二モリブデン酸アンモニウムを正確に秤量し、脱イオン水に溶解する。8%クエン酸溶液を調製し、上記溶液に1滴ずつ滴下し、滴下しながら激しく撹拌し、アンモニア水でpHを4.0に調整し、70℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、150℃にて3時間熱処理してモリブデン酸カルシウムの仮焼粉を得、900℃にて3時間熱処理して平均粒度が90nmのモリブデン酸カルシウムを得る。
(c)機能性粉体組成物の重量比1:0.5:2に基づき、35gのナノシリカ(50nm、市販)、17.5gのステップ(a)で得た希土類ケイ酸ランタン化合物及び70gのステップ(b)で得たモリブデン酸カルシウムをそれぞれ秤量し、併せて高速研削分散機のボールミルポットに加え、ボールミルの回転速度を300回転/分間とし、ボールミルの粉砕時間を6時間とし、所要の放射冷却のための赤外線選択的ナノ機能性組成物を得る。得られたナノ機能性組成物は8~14μmの赤外線波長範囲での吸収/放射率が最高0.91に達する。
(a)希土類ケイ酸ジスプロシウムの化学量論比SiO2-0.5La2O3-0.1Gd2O3-1.0Na2Oに基づき、30gのナノシリカ、162.5gの硝酸ランタン、34.3gの硝酸ガドリニウム及び85gの硝酸ナトリウムを正確に秤量し、体積エタノール・水混合溶液で溶解し、70℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、150℃にて3時間熱処理して希土類ケイ酸ジスプロシウムの仮焼粉を得、750℃にて10時間熱処理して平均粒度が120nmの希土類ケイ酸ジスプロシウムガドリニウム化合物を得る。
(b)モリブデン酸カルシウムの化学式CaMoO4に基づき、41gの硝酸カルシウム及び85gの二モリブデン酸アンモニウムを正確に秤量し、脱イオン水に溶解する。5%クエン酸溶液を調製し、上記溶液に1滴ずつ滴下し、滴下しながら激しく撹拌し、アンモニア水でpHを4.0に調整し、80℃の水浴撹拌条件で溶媒を蒸発させてゲルを得、150℃にて4時間熱処理してモリブデン酸カルシウムの仮焼粉を得、850℃にて12時間熱処理して平均粒度が85nmのモリブデン酸カルシウムを得る。
(c)機能性粉体組成物の重量比1:2:1.5に基づき、28gのナノシリカ(50nm、市販)、56gのステップ(a)で得た希土類ケイ酸ジスプロシウムガドリニウム化合物及び42gのステップ(b)で得たモリブデン酸カルシウムをそれぞれ秤量し、併せて高速研削分散機のボールミルポットに加え、ボールミル回転速度を300回転/分間とし、ボールミル粉砕時間を6時間とし、所要の放射冷却のための赤外線選択的ナノ機能性組成物を得る。得られたナノ機能性組成物は8~14μmの赤外線波長範囲での吸収/放射率が最高0.92に達する。
Claims (6)
- ナノシリカ、希土類ケイ酸塩化合物及びモリブデン酸塩化合物を、質量比1:(0.5~2):(0.5~2)で、均一な粉体の混合物として含む放射冷却のための赤外線選択的ナノ機能性組成物であって、前記希土類ケイ酸塩化合物は化学量論比SiO2-(0.5~2)Re2O3-(0.1~1.0)Na2Oを満たし、且つ9~12μmの範囲内に高い赤外線選択的放射特性を有し、前記ReはLa、Sm、Eu、Gd、Tb、Dy、Er、Tm、Yb、Y又はScであり、前記モリブデン酸塩化合物は化学量論比RMoO4を満たし、且つ10~14μmの範囲内に高い赤外線選択的放射特性を有し、前記RはMg、Ca、Sr又はBaである、放射冷却のための赤外線選択的ナノ機能性組成物。
- 8~14μmの大気の窓で高い選択的吸収-放射特性を有し、紫外線-可視光-近赤外線太陽光を透過可能であることを特徴とする、請求項1に記載の放射冷却のための赤外線選択的ナノ機能性組成物。
- (a)前記希土類ケイ酸塩化合物の化学量論比に基づき、ナノシリカ、希土類硝酸塩及び硝酸ナトリウムを正確に秤量し、エタノール・水混合溶液中に混合分散させ、水浴撹拌条件で溶媒を蒸発させてゲルを得、120~150℃にて3~6時間の低温仮焼処理を行ってから、600~900℃にて3~12時間熱処理して希土類ケイ酸塩化合物を得るステップと、
(b)前記モリブデン酸塩化合物の化学量論比に基づき、モリブデン酸アンモニウム及びアルカリ土類金属硝酸塩を正確に秤量した後に脱イオン水に溶解して溶液とし、クエン酸溶液を調製し、前記溶液を撹拌しながらそこに前記クエン酸溶液を滴下して加え、次にpHを3.0~4.0に調整し、水浴撹拌条件で溶媒を蒸発させてゲルを得、120~150℃にて3~6時間の低温仮焼処理を行ってから、800~1000℃にて3~12時間熱処理し、モリブデン酸塩化合物を得るステップと、
(c)ナノシリカ、希土類ケイ酸塩化合物及びモリブデン酸塩化合物の質量比に基づき、一定量のナノシリカ、前記希土類ケイ酸塩化合物及び前記モリブデン酸塩化合物を秤量し、高速研削分散機で処理し、放射冷却のための赤外線選択的ナノ機能性組成物を得るステップと、
を含む、請求項1に記載の放射冷却のための赤外線選択的ナノ機能性組成物の製造方法。 - 前記ステップ(a)において、前記水浴撹拌条件の温度は70~80℃であることを特徴とする、請求項3に記載の方法。
- 前記ステップ(b)において、前記クエン酸溶液の質量濃度は5%~10%であり、前記pHはアンモニア水で調整し、前記水浴撹拌条件の温度は70~80℃であることを特徴とする、請求項3に記載の方法。
- 前記ステップ(c)において、前記高速研削分散機の回転速度は300~400回転/分間であり、処理時間は2~6時間であることを特徴とする、請求項3に記載の方法。
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