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Titolo:
PLASTIC EXTRUSION FORMING OF NANOMETER-SIZE TETRAGONAL ZIRCONIA POWDER
Autore:
ZHANG ZT; HU LM;
Indirizzi:
E CHINA UNIV SCI & TECHNOL,TECH INST CHEM & PHYS SHANGHAI 200237 PEOPLES R CHINA E CHINA UNIV SCI & TECHNOL,NATL ENGN RES CTR ULTRAFINE POWDERS SHANGHAI 200237 PEOPLES R CHINA
Titolo Testata:
British ceramic transactions
fascicolo: 5, volume: 95, anno: 1996,
pagine: 205 - 208
SICI:
0967-9782(1996)95:5<205:PEFONT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
6
Recensione:
Indirizzi per estratti:
Citazione:
Z.T. Zhang e L.M. Hu, "PLASTIC EXTRUSION FORMING OF NANOMETER-SIZE TETRAGONAL ZIRCONIA POWDER", British ceramic transactions, 95(5), 1996, pp. 205-208

Abstract

Plastic extrusion forming of nanometre size (20 nm) tetragonal zirconia powder with polyvinyl alcohol (PVA) as binder has been studied. Plastic bodies had plasticity indices of 1.0-4.0 kg cm, comparable with clay, when 2-6 wt-% PVA and a water content of 40-60 wt-% were used. The plastic bodies also exhibited high plasticity at low stress levels in stress-strain curves. Green samples had a low relative density (<27%) and underwent a large linear shrinkage (47%) on sintering at 1350-1650 degrees C for 4 h. The grain size of samples sintered at 1650 degrees C for 4 h was 3-10 mu m and the density 99.5% theoretical. The observed high plasticity and low green density are attributed to the very small particle size of the powder, the large specific surface area of the powder absorbing a great amount of wafer (>80 vol.-%) as an interfacial film between the particles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/09/20 alle ore 12:17:33