Method for preparing high-transmittance NaLaS2 infrared transparent ceramic

• Main Authors: LI HUANYONG, DING WENZHONG, TIAN LEIYUAN
• Format: Patent
• Language: Chinese; English
• Published: 22.03.2017
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention relates to a method for preparing high-transmittance NaLaS2 infrared transparent ceramic. Under conditions of low preparation temperature, not high vacuum degree, not high pressure and short insulation time, the cubic phase under temperature scope of room temperature to 1300 DEG C and the NaLaS2 infrared crystalline ceramic with a stable structure can be obtained, and the technical problems of difficult generation of liquid phase, poor ceramic microstructure uniformity and low optical transmittance can be solved, and the NaLaS2 infrared transparent ceramic with transmittance of greater than or equal to 50% in wave band of 8-14 [mu]m is obtained. The method has the advantages of simple process and low cost, is adapted to large-scale preparation of NaLaS2 transparent ceramic, and has wide application prospect. 本发明涉及种制备高透过率NaLaS红外透明陶瓷的方法，在较低的制备温度，不高的真空度、不高的压力和较短的保温时间条件下，可以获得在室温～1300℃温度范围下立方相且结构稳定的NaLaS红外透明陶瓷，解决现有技术中难以产生液相，陶瓷微观组织均匀性差和光学透过低的技术问题，可以获得在8～14μm的波段透过率≥50％的NaLaS红外透明陶瓷。同时，工艺简单，成本低，适于大规模制备Na