ScholarLens Back to search
2005•Guisuanyan xuebaoRequires access

PREPARATION OF ZrO_(2)/Al_(2)O_(3 ) COMPOSITE NANOPOWDER BY LIQUID PHASE PRECIPITATION METHOD

Xinrui Gao

Open publisher page 0 citations

Abstract

Using pure NH_(4)Al(SO_(4))_(2)·12H_(2)O,ZrOCl_(2)·8H_(2)O and Y(NO)_(3) as starting materials and NH_(4)HCO_(3) solution as precipitant agent, the ultra fine 3YZrO_(2)/Al_(2)O_(3 )precursor was prepared by the liquid-phase precipitation method, controlling the dripping speed below 5 mL/min. Zirconia/alumina composite nanopowder with good dispersibility and average particle size of (20 nm) was obtained by calcining the precursor at 1 200 ℃. X-ray diffiraction patterns show that no γAl_(2)O_(3 )and θAl_(2)O_(3) were formed during calcination. The resultant powder has an excellent sinterability and the relative density of samples obtained reaches up to 97% after sintering at 1 450 ℃.

About this research paper

What this paper is about

Using pure NH_(4)Al(SO_(4))_(2)·12H_(2)O,ZrOCl_(2)·8H_(2)O and Y(NO)_(3) as starting materials and NH_(4)HCO_(3) solution as precipitant agent, the ultra fine 3YZrO_(2)/Al_(2)O_(3 )precursor was prepared by the liquid-phase precipitation method, controlling the dripping speed below 5 mL/min. Zirconia/alumina composite nanopowder with good dispersibility and average particle size of (20 nm) was obtained by calcining the precursor at 1 200 ℃. X-ray diffiraction patterns show that no γAl_(2)O_(3 )and θAl_(2)O_(3) were formed during calcination. The resultant powder has an excellent sinterability and the relative density of samples obtained reaches up to 97% after sintering at 1 450 ℃.

Why it matters

A significance statement is not available in the OpenAlex record.

Key contribution

A contribution statement is not available in the OpenAlex record.

Method / approach

Method details are not available in the OpenAlex metadata.

Main findings

Findings are not separately available in the OpenAlex metadata.

Limitations

Limitations are not available in the OpenAlex metadata.

Applications

Application details are not available in the OpenAlex metadata.

Available abstract

Using pure NH_(4)Al(SO_(4))_(2)·12H_(2)O,ZrOCl_(2)·8H_(2)O and Y(NO)_(3) as starting materials and NH_(4)HCO_(3) solution as precipitant agent, the ultra fine 3YZrO_(2)/Al_(2)O_(3 )precursor was prepared by the liquid-phase precipitation method, controlling the dripping speed below 5 mL/min. Zirconia/alumina composite nanopowder with good dispersibility and average particle size of (20 nm) was obtained by calcining the precursor at 1 200 ℃. X-ray diffiraction patterns show that no γAl_(2)O_(3 )and θAl_(2)O_(3) were formed during calcination. The resultant powder has an excellent sinterability and the relative density of samples obtained reaches up to 97% after sintering at 1 450 ℃.

Key concepts: Materials science, Calcination, Composite number, Sintering, Cubic zirconia, Precipitation, Phase (matter), Relative density

Related papers

Related paper 1Related paper 2Related paper 3
Back to paper searchBrowse research topicsOriginal source
PREPARATION OF ZrO_(2)/Al_(2)O_(3 ) COMPOSITE NANOPOWDER BY LIQUID PHASE PRECIPITATION METHOD — Research Paper | ScholarLens