Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes
Aluminium monohydroxide, also known as aluminium oxyhydroxide (boehmite - AlO[OH]), is water insoluble but crystallises into microcrystals of various shapes. When, by X-ray diffraction, the microcrystals present a basal reflexion (d[020]) of 0.611 nm, the crystalline structure is referred to as &quo...
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
2009-01-01
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| Series: | Materials Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000400012 |
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| author | Pérsio de Souza Santos Antonio Carlos Vieira Coelho Helena de Souza Santos Pedro Kunihiko Kiyohara |
| author_facet | Pérsio de Souza Santos Antonio Carlos Vieira Coelho Helena de Souza Santos Pedro Kunihiko Kiyohara |
| author_sort | Pérsio de Souza Santos |
| collection | DOAJ |
| description | Aluminium monohydroxide, also known as aluminium oxyhydroxide (boehmite - AlO[OH]), is water insoluble but crystallises into microcrystals of various shapes. When, by X-ray diffraction, the microcrystals present a basal reflexion (d[020]) of 0.611 nm, the crystalline structure is referred to as "well-crystallised" boehmite. Natural and synthetic crystals of well-crystallised boehmite can have a plate-like shape with either a rhombic or hexagonal profile. Synthetic crystals can also be lath-like or ellipsoid in shape. The purpose of this paper is to present a method of hydrothermal synthesis using a single temperature (200 ºC) for preparing plate-like crystals of well-crystallised boehmite with ellipsoid, rhombic, hexagonal, and lath-like profiles by using different precursors. Our observations suggest that all of these shapes are stages of growth of the microcrystals of well-crystallised boehmite along the c-axis direction of the rhombic crystals. |
| first_indexed | 2024-04-12T12:27:56Z |
| format | Article |
| id | doaj.art-a1921a6e749349c68c7238c83b3f0b2a |
| institution | Directory Open Access Journal |
| issn | 1516-1439 |
| language | English |
| last_indexed | 2024-04-12T12:27:56Z |
| publishDate | 2009-01-01 |
| publisher | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol) |
| record_format | Article |
| series | Materials Research |
| spelling | doaj.art-a1921a6e749349c68c7238c83b3f0b2a2022-12-22T03:33:06ZengAssociação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)Materials Research1516-14392009-01-0112443744510.1590/S1516-14392009000400012Hydrothermal synthesis of well-crystallised boehmite crystals of various shapesPérsio de Souza SantosAntonio Carlos Vieira CoelhoHelena de Souza SantosPedro Kunihiko KiyoharaAluminium monohydroxide, also known as aluminium oxyhydroxide (boehmite - AlO[OH]), is water insoluble but crystallises into microcrystals of various shapes. When, by X-ray diffraction, the microcrystals present a basal reflexion (d[020]) of 0.611 nm, the crystalline structure is referred to as "well-crystallised" boehmite. Natural and synthetic crystals of well-crystallised boehmite can have a plate-like shape with either a rhombic or hexagonal profile. Synthetic crystals can also be lath-like or ellipsoid in shape. The purpose of this paper is to present a method of hydrothermal synthesis using a single temperature (200 ºC) for preparing plate-like crystals of well-crystallised boehmite with ellipsoid, rhombic, hexagonal, and lath-like profiles by using different precursors. Our observations suggest that all of these shapes are stages of growth of the microcrystals of well-crystallised boehmite along the c-axis direction of the rhombic crystals.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000400012aluminium hydroxideboehmitepseudoboehmitefibrillar pseudoboehmite |
| spellingShingle | Pérsio de Souza Santos Antonio Carlos Vieira Coelho Helena de Souza Santos Pedro Kunihiko Kiyohara Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes Materials Research aluminium hydroxide boehmite pseudoboehmite fibrillar pseudoboehmite |
| title | Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes |
| title_full | Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes |
| title_fullStr | Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes |
| title_full_unstemmed | Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes |
| title_short | Hydrothermal synthesis of well-crystallised boehmite crystals of various shapes |
| title_sort | hydrothermal synthesis of well crystallised boehmite crystals of various shapes |
| topic | aluminium hydroxide boehmite pseudoboehmite fibrillar pseudoboehmite |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000400012 |
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