| 摘要 |
In a process for coating a glass or vitrified ceramic object with a noble metal (i.e. Au, Pt, Rh, Ir, Os, Pd, Ru, or an alloy of two or more thereof), the object is first coated with a colloidal metallic hydrate, then a colloidal dispersion of silver, and finally treated in a solution containing a noble metal salt and a reducing agent, the reduction being catalysed by the intermediate hydrate/silver film. As described, the intermediate p film is established by successively treating the object in stannous chloride and silver nitrate solutions. Suitable reducing agents are hydrogen peroxide, sodium peroxide, benzoyl peroxide and hydrazine hydrate and hydrochloride. The examples disclose the use of noble metal salt solutions containing AuCl3 and Na3RhCl6. |
