Supercharge Your Innovation With Domain-Expert AI Agents!

A method for preparing high transmittance nalas2 infrared transparent ceramics

A technology of transparent ceramics and high transmittance, applied in the field of new materials, can solve problems such as complex process, high infrared transmittance, and difficulty in controlling microstructure uniformity, and achieve low cost, simple process, and broad application prospects Effect

Active Publication Date: 2019-02-15
陕西智航昱铠新材料有限责任公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing high transmittance NaLaS 2 The method of infrared transparent ceramics overcomes the complex process of the prior art, the difficulty of producing liquid phases in the preparation of transparent ceramics, the difficulty of controlling the uniformity of the microstructure and obtaining high infrared transmittance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1, at 25 °C, 35.3 g of analytically pure LaCl 3 ·6H 2 O was dissolved in 100ml deionized water to obtain a concentration of 1.0mol L -1 The solution of lanthanum chloride; 25.8 grams of analytically pure sodium citrate (chemical formula Na 3 C 6 h 5 o 7 ) was dissolved in 100ml deionized water to obtain a concentration of 1.0mol L -1 Sodium citrate solution; 5.9 g of NaCl was dissolved in 15 ml of deionized water to make a saturated solution of NaCl. The molar ratio of the solutes in the above solutions is LaCl 3 ·6H 2 O: sodium citrate: NaCl = 1.0:1.0:1.0. Mix the lanthanum chloride solution and the sodium citrate solution at 25°C, stir evenly with a magnetic stirrer, then transfer to a stainless steel autoclave with a polytetrafluoroethylene liner, the filling degree is 90%, and the high-pressure reaction The autoclave was closed, and then the autoclave was placed in an electric furnace, and the temperature was raised to 120 °C at a rate of 10 °C / min, an...

Embodiment 2

[0040] Step 1, at 25 °C, 10.6 g of analytically pure LaCl 3 ·6H 2 O was dissolved in 30ml deionized water to obtain a concentration of 1.0mol L -1 The solution of lanthanum chloride; 12.9 grams of analytically pure sodium citrate (chemical formula Na 3 C 6 h 5 o 7 ) was dissolved in 50ml deionized water to obtain a concentration of 1.0mol L -1 Sodium citrate solution; 3.0 g of NaCl was dissolved in 8.0 ml of deionized water to make a saturated solution of NaCl. The molar ratio of the solutes in the above solutions is LaCl 3 ·6H 2 O: citric acid: NaI = 1.0:1.0:1.0. Mix the lanthanum chloride solution and the sodium citrate solution at 25°C, stir evenly with a magnetic stirrer, then transfer to a stainless steel autoclave lined with polytetrafluoroethylene, seal the autoclave, and fill it to a degree of 90%, then put the autoclave in an electric furnace, raise the temperature to 150 °C at a rate of 10 °C / min, keep it warm for 120 min, then cool the furnace to room tempe...

Embodiment 3

[0046] Step 1, at 25 °C, 17.7 g of analytically pure LaCl 3 ·6H 2 O was dissolved in 30ml deionized water to obtain a concentration of 1.0mol L -1 The solution of lanthanum chloride; 7.8 grams of analytically pure sodium citrate (chemical formula Na 3 C 6 h 5 o 7 ) was dissolved in 30ml deionized water to obtain a concentration of 1.0mol L -1 Sodium citrate solution; 1.8 g of NaCl was dissolved in 5.0 ml of deionized water to make a saturated solution of NaCl. The mass ratio of the solute between the above solutions is LaCl 3 ·6H 2 O: citric acid: NaI = 1.0:1.0:1.0. Mix the lanthanum chloride solution and the sodium citrate solution at 25°C, stir evenly with a magnetic stirrer, then transfer to a stainless steel autoclave lined with polytetrafluoroethylene, seal the autoclave, and fill it to a degree of 90%, then put the autoclave in an electric furnace, raise the temperature to 130 °C at a rate of 10 °C / min, keep it warm for 200 min, then cool the furnace to room tem...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
melting pointaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of new materials, in particular to a method for preparing high transmittance NaLaS 2 A method for infrared transparent ceramics. Background technique [0002] NaLaS 2 It is a ternary rare earth chalcogen compound with a cubic NaCl structure, theoretically it has good transmittance in the infrared band of 2.5-20 μm and its refractive index n=1.74, its melting point is as high as 1800 ° C, and its thermal expansion coefficient is 3.4×10 - 6 K -1 , with a thermal conductivity of 1.4W·m -1 ·K -1 , the hardness is 430kg / mm 2 , (Materials Research Bulletin, 1999, 34(8):1291-1300). Therefore, NaLaS 2 It is an infrared wave-transparent material with excellent physical and chemical properties, which can be widely used in the field of infrared technology. 1975 Isaacs passed test NaLaS 2 Infrared spectra of cold-pressed tablets mixed with powder and KBr, suggesting for the first time that NaLaS 2 Can be used...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/626C04B35/645
CPCC04B35/5156C04B35/547C04B35/626C04B35/645C04B2235/444C04B2235/9653
Inventor 李焕勇田雷远丁文忠
Owner 陕西智航昱铠新材料有限责任公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com