Ouro e Suas Utilidades
Autor: Claudia Theolier | Publicado: 2016-05-20T11:45:00-03:00


O ouro devido as suas características física e química é utilizado em diversos produtos e não só em joalheria como muitos pensam.
É impressionante a utilidade do ouro, além de uma poderosa commodities financeira, na medicina, na indústria, na navegação espacial, em nanotecnologia e diversos outros mercados.

Alguns dele listamos abaixo:
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Fotografias:
     o metal aparece na forma de um ácido, o cloroaúrico (HAuCl4);
Gastronomia:
     o pó de ouro é usado na decoração de bolos e doces;
Microscopia:
     empregado no revestimento de materiais biológicos, além de permitir a
     visualização através do microscópio eletrônico de varredura (MEV);
Economia:
     o ouro é altamente empregado como reserva monetária, como garantia do
     papel-moeda em circulação, além de atuar na cobertura de pagamentos a
     outros países quando ocorrem diferenças nas balanças comerciais;
Tecnologia:
     aplicado em satélites artificiais e em janelas de grandes edifícios
     comerciais, sob a forma de finas películas, pois este metal é responsável
     pela reflexão de mais de 98% da radiação infra – vermelha incidente;
Joalheria:
     utilizado na forma de liga, associado a outros metais, como cobre e prata.
     Recebe a classificação de quilate, esta corresponde a cada parte do metal
     em peso, que é usada na formação da liga;
Decoração:
     o ouro na forma coloidal é aplicado na pintura de peças de cerâmica.
Próteses
     Dentárias: devido à resistência à corrosão e a maleabilidade do metal,
     este e alguns de seus derivados são utilizados na fabricação deste tipo de
     prótese.
Indústria:
     dentre as diversas aplicações, destaca-se o uso do ouro como catalisador
     (acelerador de reações químicas).
Medicina:
     as aplicações medicinais e terapêuticas são diversas e crescentes.
     Utiliza-se em cirurgias, uma vez que malhas de finíssimos fios de ouro são
     colocadas para reparar vaso




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