Thick film microsensors based on nanosized titania sol-gel powder

• Autorzy: Carotta M. C. , Butturi M. A. , Martinelli G. , Di Vona M. L. , Licoccia S. , Traversa E.
• Konferencja: International Seminar on Semiconductor Gas Sensors : SGS' 98 (1 ; 22-25.09.1998 ; Ustroń, Poland)
• Języki publikacji: EN

Abstrakty

EN

Thick films of nanostructured TiO₂ and tantalum-doped TiO₂ have based fabricated by screen-printing technology starting from pure titania and tantalum-doped titania powders prepared by sol-gel method. The titania powders, obtained via sol-gel, show crystalline anatase structure and the particles are homogeneous and nanosized (30 ÷ 50 nm). Two series of films each one composed by pure and Ta-doped titania samples have been obtained by firing the pastes in air atmosphere at the temperatures of 650°C and 850°C, respectively. SEM observations and electrical characterizations showed that the firing temperature strongly influences the nanostructure and the gas response of the pure titania samples. The addition of tantalum inhibits the grain sintering at the higher temperature. Moreover the electrical data show that the tantalum addition (10 at.%) does not affect the conductance of the films in air while significantly enhances the response towards CO and leaves almost unaltered or enhances its ability to sense NO₂ depending on the thermal treatments.

• Wydawca: Institute of Electron Technology
• Czasopismo: Electron Technology
• Rocznik: 2000
• Tom: Vol. 33, No. 1/2
• Strony: 113--117
• Opis fizyczny: Bibliogr. 10 poz.

Twórcy

autor

Carotta M. C.

autor

Butturi M. A.

autor

Martinelli G.

autor

Di Vona M. L.

autor

Licoccia S.

autor

Traversa E.

• INFM - Dipartimento di Fisica, Universita di Ferrara, Via Paradiso 12, 44100 Ferrara, Italy,