Control of the nanostructure of MgO-Y2O3 composite ceramics using two-step sintering for high temperature mid infrared window applications
被引:10
作者:
Brard, Nathan
论文数: 0引用数: 0
h-index: 0
机构:
Univ Paris Saclay, DMAS, ONERA, F-92322 Chatillon, FranceUniv Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Brard, Nathan
[1
]
Petit, Johan
论文数: 0引用数: 0
h-index: 0
机构:
Univ Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Off Natl Etud & Rech Aerosp, French Aerosp Lab, Ctr Chatillon 29,Ave Div Leclerc,BP 72, F-92322 Chatillon, FranceUniv Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Petit, Johan
[1
,4
]
Emery, Nicolas
论文数: 0引用数: 0
h-index: 0
机构:
CNRS, ICMPE, UMCR 7182, 2 Rue Henri Dunant, F-94320 Thiais, FranceUniv Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Emery, Nicolas
[2
]
Horezan, Nicolas
论文数: 0引用数: 0
h-index: 0
机构:
Univ Paris Saclay, DMAS, ONERA, F-92322 Chatillon, FranceUniv Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Horezan, Nicolas
[1
]
Bach, Stephane
论文数: 0引用数: 0
h-index: 0
机构:
CNRS, ICMPE, UMCR 7182, 2 Rue Henri Dunant, F-94320 Thiais, France
Univ Paris Saclay Evry, Dept Chim, F-91000 Evry, FranceUniv Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
Bach, Stephane
[2
,3
]
机构:
[1] Univ Paris Saclay, DMAS, ONERA, F-92322 Chatillon, France
[2] CNRS, ICMPE, UMCR 7182, 2 Rue Henri Dunant, F-94320 Thiais, France
[3] Univ Paris Saclay Evry, Dept Chim, F-91000 Evry, France
[4] Off Natl Etud & Rech Aerosp, French Aerosp Lab, Ctr Chatillon 29,Ave Div Leclerc,BP 72, F-92322 Chatillon, France
Transparent Y2O3-MgO nanocomposite ceramic has been processed for mid-IR window applications. The powder was synthesized by a sol-gel route. The final temperature of this process has an impact on the crystallite size and crystallization ratio. A homogeneous powder with around 10 nm crystallite size was made with a final tem-perature of 600 degrees C. The powder was then sintered by the SPS technique performing a two-step sintering process at 1200 degrees C/50 MPa instead of a conventional bearing. A fully dense ceramic (>99%) with an average grain diameter of 150 nm (compared to 350 nm with one-stage sintering) was obtained. After HIP at 400 MPa and annealing in air for 100 h post-treatments, the IR transmittance in the 3-5 mu m wavelength range exceeds 80% for a thickness of 1 mm. Transparency loss at 5 mu m is less than 10% at 1000 degrees C, which is more suitable for the IR's band II than materials such as sapphire, spinel or AlON.