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Patents

Process for producing compound nanopowders based on titanium, lead and zirconium oxides (2379259)
RF Patent for an invention № 2379259
Published: 04.06.2008

 

Patent holder (s):
PJSC “State Research and Design Institute of Rare-Metal Industry “Giredmet”

 

Inventors:
Nina Petrovna Sokolova, Andrey Andreyevich Titov, Irina Eugenyevna Lapshina, Andrey Mikhaylovich Vikhlyansky

 

The method can be used in chemical industry to produce composite material nanopowders based on lead, titanium and zirconium oxides for manufacturing ceramics with special properties. Oxalic acid mixture and titanium dioxide in the form of fine powder are injected into individual component base salt mixture alcoholic solution producing individual component oxalate mixture with further thermal synthesys of produced oxalate mixture. Synthesis process contains two stages at the temperature of 320-370°С during the first stage and not more than 780°С during the last stage; with heating rate in the temperature range of 5-12 degree/min, using ageing at preset temperature at each stage and cooling reacting mass after each stage in the same reaction volume. The method allows to produce compound powders based on titanium, lead and zirconium oxides with 100% perovskite structure and fineness of 5,5-6,5 nm; to reduce process energy capacity and simplify the process flow diagram by excluding pregrinding operations of source individual oxides.


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