A kind of preparation method of lutetium oxide transparent ceramic

Abstract

The invention discloses a preparation method of lutetium oxide transparent ceramics. The method comprises the following steps: using hydrated lutetium nitrate and thiourea as raw materials, adopting a low-temperature combustion method to prepare nanometer lutetium oxysulfide (Lu2O2S) powder; ℃ air sintering and 1400‑1500℃ vacuum sintering to obtain lutetium oxide transparent ceramics. The preparation method of the invention has the advantages of low sintering temperature, low cost, easy operation and the like, and the prepared lutetium oxide ceramic has high density and good light transmittance.

Description

technical field [0001] The invention relates to a preparation method of lutetium oxide transparent ceramics, and specifically belongs to the technical field of preparation of ceramic materials. Background technique [0002] Lutetium oxide 2 o 3 It is a promising matrix material for laser and scintillator. It has high transmittance under visible light and infrared light, large emission cross-section, low phonon energy, high density, and good mechanical and thermal properties. However Lu 2 o 3 The melting point is as high as 2450 ° C, and the growth of single crystal materials containing various doping components by the pulling method is not only difficult to achieve, but also very expensive. Lu 2 o 3 It has a cubic crystal structure, optical isotropy, and the refractive index does not depend on directionality. The powder can be made into transparent ceramics through nanocrystal technology and high-temperature sintering technology. Therefore, the development of lutetium...

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Problems solved by technology

For example, A. Lempicki et al synthesized Eu by oxalate precipitation 3+ Doped Lu 2 o 3 Ceramic scintillator, due to the large Ksp of oxalate, the powder obtained by oxalate precipitation method has a large particle size and is easy to agglomerate; E. Zych et al. synthesized RE by using urea as fuel and using solution combustion method 3+ Doped Lu 2 o 3 The luminescent powder is then vacuum sintered, and only translucent ceramic samples can be obtained. This is because the combustion synthesis powder is seriously agglomerated and the sintering activity is low; the invention patent 1510813014.X uses lithium fluoride and zirconia as sintering aids, after molding and vacuum sintering at 1850°C to obtain Lu 2 o 3 Based on transparent ceramics, the transmittance exceeds 80%. Due to the addition of sintering aids, its luminous performance is affected and reduced; the invention patent CN200510027208.3 obtains Lu by precipitation method 2 o 3 Nanopowders, then formed and vacuum sintered at 1850°C to obtain Lu 2 o 3 Based on transparent ceramics, the sintering temperature used is too high and the cost is high

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