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Method for spontaneous solidification forming of hydrolysis-resistant compact transparent AlON ceramic
The invention discloses a spontaneous solidification forming method of hydrolysis-resistant compact transparent AlON ceramic, which is characterized in that organic polymer coated AlN/Al2O3 is used as a raw material, and AlON is synthesized through a high-temperature carbon thermal-nitridation process, so that the synthesis temperature of AlON is effectively reduced, and submicron AlON powder which is nearly pure phase is obtained. A series of spontaneous coagulators integrating dispersion and gel curing are designed and synthesized, and are used for in-situ curing molding of compact ceramics, so that the risk of deformation and cracking due to overlarge shrinkage rate in the drying and sintering processes is reduced. And citric acid and a polyurethane prepolymer are added to perform adsorption and polymerization reaction on the surfaces of AlON powder particles to form a polyurethane coating layer in situ, so that hydration-resistant treatment of the AlON powder is realized. The strength of the low-temperature pressureless sintered transparent AlON reaches 310 MPa, the ultraviolet-mid-infrared linear transmittance reaches 98% or above of a theoretical value, and the low-temperature pressureless sintered transparent AlON shows excellent mechanical and optical properties.
本发明公开了一种抗水解致密透明AlON陶瓷自发凝固成型的方法，以有机聚合物包覆AlN/Al2O3为原料,通过高温碳热‑氮化工艺合成AlON,有效降低AlON的合成温度，获得近乎纯相的亚微米AlON粉体。设计并合成了集分散和凝胶固化于一体的系列自发凝固剂,用于致密陶瓷的原位固化成型，降低了干燥和烧结过程中由于收缩率过大而变形开裂的风险。通过添加柠檬酸和聚氨酯预聚物在AlON粉体颗粒表面的吸附和聚合反应原位形成聚氨酯包覆层,实现AlON粉体的抗水化处理。本发明的低温无压烧结透明AlON,其强度达到310MPa，紫外‑中红外直线透过率达到理论值的98％以上，表现出优异的力学和光学性能。
Method for spontaneous solidification forming of hydrolysis-resistant compact transparent AlON ceramic
The invention discloses a spontaneous solidification forming method of hydrolysis-resistant compact transparent AlON ceramic, which is characterized in that organic polymer coated AlN/Al2O3 is used as a raw material, and AlON is synthesized through a high-temperature carbon thermal-nitridation process, so that the synthesis temperature of AlON is effectively reduced, and submicron AlON powder which is nearly pure phase is obtained. A series of spontaneous coagulators integrating dispersion and gel curing are designed and synthesized, and are used for in-situ curing molding of compact ceramics, so that the risk of deformation and cracking due to overlarge shrinkage rate in the drying and sintering processes is reduced. And citric acid and a polyurethane prepolymer are added to perform adsorption and polymerization reaction on the surfaces of AlON powder particles to form a polyurethane coating layer in situ, so that hydration-resistant treatment of the AlON powder is realized. The strength of the low-temperature pressureless sintered transparent AlON reaches 310 MPa, the ultraviolet-mid-infrared linear transmittance reaches 98% or above of a theoretical value, and the low-temperature pressureless sintered transparent AlON shows excellent mechanical and optical properties.
本发明公开了一种抗水解致密透明AlON陶瓷自发凝固成型的方法，以有机聚合物包覆AlN/Al2O3为原料,通过高温碳热‑氮化工艺合成AlON,有效降低AlON的合成温度，获得近乎纯相的亚微米AlON粉体。设计并合成了集分散和凝胶固化于一体的系列自发凝固剂,用于致密陶瓷的原位固化成型，降低了干燥和烧结过程中由于收缩率过大而变形开裂的风险。通过添加柠檬酸和聚氨酯预聚物在AlON粉体颗粒表面的吸附和聚合反应原位形成聚氨酯包覆层,实现AlON粉体的抗水化处理。本发明的低温无压烧结透明AlON,其强度达到310MPa，紫外‑中红外直线透过率达到理论值的98％以上，表现出优异的力学和光学性能。
Method for spontaneous solidification forming of hydrolysis-resistant compact transparent AlON ceramic
一种抗水解致密透明AlON陶瓷自发凝固成型的方法
FENG YINGJUN (Autor:in) / CHEN YUE (Autor:in) / PENG JIANGLONG (Autor:in) / QIN TIANYU (Autor:in) / LI PENGPENG (Autor:in)
11.06.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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