JP7429408B2 - 酸化ガリウムの製造方法 - Google Patents
酸化ガリウムの製造方法 Download PDFInfo
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- JP7429408B2 JP7429408B2 JP2019194105A JP2019194105A JP7429408B2 JP 7429408 B2 JP7429408 B2 JP 7429408B2 JP 2019194105 A JP2019194105 A JP 2019194105A JP 2019194105 A JP2019194105 A JP 2019194105A JP 7429408 B2 JP7429408 B2 JP 7429408B2
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- gallium oxide
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- gallium
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- 229910001195 gallium oxide Inorganic materials 0.000 title claims description 52
- 238000004519 manufacturing process Methods 0.000 title claims description 46
- AJNVQOSZGJRYEI-UHFFFAOYSA-N digallium;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Ga+3].[Ga+3] AJNVQOSZGJRYEI-UHFFFAOYSA-N 0.000 title claims description 44
- 238000000034 method Methods 0.000 title description 20
- 239000002245 particle Substances 0.000 claims description 85
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 claims description 55
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 claims description 35
- 229910052733 gallium Inorganic materials 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000002994 raw material Substances 0.000 claims description 23
- 239000003638 chemical reducing agent Substances 0.000 claims description 15
- 239000013078 crystal Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 10
- 239000002105 nanoparticle Substances 0.000 claims description 9
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine hydrate Chemical compound O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 238000002441 X-ray diffraction Methods 0.000 description 15
- 239000002904 solvent Substances 0.000 description 15
- 229910001868 water Inorganic materials 0.000 description 13
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 12
- 230000001699 photocatalysis Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 7
- 238000000862 absorption spectrum Methods 0.000 description 6
- 238000001228 spectrum Methods 0.000 description 6
- 238000000926 separation method Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- QZQVBEXLDFYHSR-UHFFFAOYSA-N gallium(III) oxide Inorganic materials O=[Ga]O[Ga]=O QZQVBEXLDFYHSR-UHFFFAOYSA-N 0.000 description 3
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 3
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- CHPZKNULDCNCBW-UHFFFAOYSA-N gallium nitrate Chemical compound [Ga+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CHPZKNULDCNCBW-UHFFFAOYSA-N 0.000 description 2
- 238000010335 hydrothermal treatment Methods 0.000 description 2
- -1 lithium aluminum hydride Chemical compound 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 2
- 229940043267 rhodamine b Drugs 0.000 description 2
- 238000004626 scanning electron microscopy Methods 0.000 description 2
- 239000012279 sodium borohydride Substances 0.000 description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011668 ascorbic acid Substances 0.000 description 1
- 229960005070 ascorbic acid Drugs 0.000 description 1
- 235000010323 ascorbic acid Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005049 combustion synthesis Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229940044658 gallium nitrate Drugs 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000012280 lithium aluminium hydride Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 102000054765 polymorphisms of proteins Human genes 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Description
本発明の実施の形態の酸化ガリウムの製造方法は、まず、液体のガリウムと還元剤とを含む原料溶液に対して超音波を照射する。このとき、例えば、超音波の周波数は20kHz乃至500kHzであり、照射時間は1乃至48時間である。また、還元剤は、例えば、エチレングリコール、ホルムアルデヒド、クエン酸、アスコルビン酸、水酸化ホウ素ナトリウム、水素化ホウ素ナトリウム、水素化アルミニウムリチウム、水素化アルミニウムナトリウム、ヒドラジンなどである。
本発明の実施の形態の酸化ガリウムの製造方法では、原料溶液に還元剤を加えることにより、オキシ水酸化ガリウム(GaOOH)の生成を抑制し、ガリウムと原料溶液中の水とを直接反応させて、γ-Ga2O3を生成することができる。また、本発明の実施の形態の酸化ガリウムの製造方法では、原料溶液に超音波を照射することにより、ガリウムの粒子を微細化することができる。これにより、微細化されたガリウム粒子の表面からγ-Ga2O3の結晶を成長させることができ、少なくとも表面にγ-Ga2O3の結晶を有する粒子を形成することができる。
実施例1および実施例2と比較するため、溶媒を水のみとして、図1に示す方法により、超音波の照射時間が3時間、6時間、12時間、24時間の4種類の比較試料を作製した。作製した各比較試料のXRDスペクトルおよび走査型電子顕微鏡(SEM)写真を、それぞれ図7および図8に示す。
Claims (7)
- 液体のガリウムと、ヒドラジン一水和物から成る還元剤とを含む原料溶液に対して超音波を照射することにより、少なくとも表面にγ-酸化ガリウム(γ-Ga2O3)の結晶を有する粒子を形成することを特徴とする酸化ガリウムの製造方法。
- 前記原料溶液に対して、20kHz乃至500kHzの超音波を、1乃至48時間照射することを特徴とする請求項1記載の酸化ガリウムの製造方法。
- 前記粒子は、平均粒径が1nm~600nmであることを特徴とする請求項1または2記載の酸化ガリウムの製造方法。
- 前記粒子は、平均粒径が1nm~100nmのγ-酸化ガリウムのナノ粒子であることを特徴とする請求項1または2記載の酸化ガリウムの製造方法。
- 前記超音波を照射後の前記原料溶液を乾燥させることにより、前記粒子を回収することを特徴とする請求項1乃至4のいずれか1項に記載の酸化ガリウムの製造方法。
- 前処理として、前記液体のガリウムを含む溶液に対して超音波を照射した後、その溶液に前記還元剤を加えて前記原料溶液を調製することを特徴とする請求項1乃至5のいずれか1項に記載の酸化ガリウムの製造方法。
- 前記粒子に対して、300℃~500℃または700℃~900℃の熱処理を行うことを特徴とする請求項1乃至6のいずれか1項に記載の酸化ガリウムの製造方法。
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JP2010082776A (ja) | 2008-10-01 | 2010-04-15 | Tohoku Univ | 有機溶媒ソノケミストリーによるナノ粒子合成法 |
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JP2010082776A (ja) | 2008-10-01 | 2010-04-15 | Tohoku Univ | 有機溶媒ソノケミストリーによるナノ粒子合成法 |
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