Through the customization of SiC ceramic precursor, the laboratory has conducted in-depth research on the structure design and synthesis process of solid and liquid polypropylenes. Of synthesis of poly (liquid carbon silane with ceramic yield extreme (1000 ℃ under the ceramic yield up to 78%), lengthy storage time (> 6 months), low oxygen content (~ 0.1 wt%), and excellent liquidity (plural viscosity ~ 0.01 Pa s.) characteristics, combining structure design and crosslinking process can realize instant liquid poly carbon silane or minutes stated curing. Solid polycarbonate has the characteristics of low branching degree and excellent spinnability, which can meet the requirements of fiber forming (AppL. Organomet. Chem.,2019; (2) : 33 e4720; int. , 2019, 45(13):16380 -- 16386; soc. , 2019, 102(3):1041 -- 1048; patents: CN201910430199.4, CN201911016657.6, CN201911016637.9).
Combined with the customization of precursor structure and the formation of excellent fusible soluble material, the laboratory has realized the efficient conversion of SiC precursor into hollow SiC fiber, porous SiC foam with low thermal conductivity, complex 3D-printed SiC components, electrospun SiC fiber, high-strength composite materials, etc. The SiC ceramics transform from "single application type" to "comprehensive service type", realize value maximization, function diversification and product differentiation, and play a promoting role in related fields (Ceram. Int. , 2019, 45(18): 24007 -- 24013; j. Eur. Ceram. Soc. , 2019, 39(6):2028 -- 2035; adv. Appl. Ceram. , 2019,
10.1080/17436753.2019.1707413; patent application: CN201910090356.1).
Recently, on the basis of preliminary laboratory tests, the Advanced Energy Engineering Laboratory has independently designed and successfully built two pilot test platforms: solid and liquid polycarbonate, which lays a solid foundation for the subsequent engineering and application research. The liquid precursor pilot test platform has successfully synthesized the target product of kg polypropylene through operation and debugging.
The above work was supported by the "3315" Innovation team project of Ningbo City, the Strategic Pilot Science and Technology Special Project of the Chinese Academy of Sciences, and the key deployment project of the Chinese Academy of Sciences.
Progress has been made in the research of silicon carbide precursor
Silicon carbide (SiC) ceramics have excellent comprehensive properties such as high temperature resistance, corrosion resistance, wear resistance, irradiation resistance, extreme strength, extreme hardness, tiny thermal expansion rate and so on, which plays an essential role in the field of energy security. At present, the molding of ceramic materials including SiC ceramics mainly adopts the traditional powder method, that is, from the preparation of micro powder, molding (including rolling, extrusion, dry pressing, isostatic pressing, pouring, injection, etc.), sintering to processing this process. In the past 30 years, different processes of ceramic powder molding have emerged one after another, and breakthroughs have been made in all aspects. However, there are still some limitations that are difficult to overcome by this traditional method, including difficulty in obtaining uniform chemical composition, poor finishing ability, difficulty in manufacturing complex components, and difficulty in solving the inherent brittleness of ceramic materials. The short plate of ceramic material and silicon carbide ceramic foam filter in machining has affected the development of its application field. Therefore, it has become one of the critical research directions to study the current ceramic forming technology while optimizing the traditional ceramic forming technology.
Precursor transformed ceramics are ceramic materials formed by cracking organic matter containing silicon, boron, carbon, nitrogen, oxygen and additional elements. It has the advantages of easy processing, low ceramic temperature, uniform ceramic composition, the introduction of reinforcing phase, and the chemical composition and structure of precursor can be regulated by molecular design to optimize the composition, structure and properties of ceramics, which is a transformative technology for the preparation of superior performance ceramic materials. The transformation of precursor ceramics poses challenges to the design of precursor molecular structure, the control of elemental composition, the physicochemical behavior of the ceramic transformation process, and the crystal phase transformation of covalently bonded ceramics. Ningbo material technology and engineering, Chinese Academy of Sciences institute of advanced energy materials engineering laboratory after the demonstration, the "transformation of preceramic polymer molecular structure design and the high performance ceramic", as one of the key subject development direction, in the Chinese Academy of Sciences and the support of ningbo "3315 plan" class A, of customized, efficient conversion of preceramic polymer and engineering to carry out the research, The following progress has been made in 2019.
Through the customization of SiC ceramic precursor, the laboratory has conducted in-depth research on the structure design and synthesis process of solid and liquid polypropylenes. Of synthesis of poly (liquid carbon silane with ceramic yield extreme (1000 ℃ under the ceramic yield up to 78%), lengthy storage time (> 6 months), low oxygen content (~ 0.1 wt%), and excellent liquidity (plural viscosity ~ 0.01 Pa s.) characteristics, combining structure design and crosslinking process can realize instant liquid poly carbon silane or minutes stated curing. Solid polycarbonate has the characteristics of low branching degree and excellent spinnability, which can meet the requirements of fiber forming (AppL. Organomet. Chem.,2019; (2) : 33 e4720; int. , 2019, 45(13):16380 -- 16386; soc. , 2019, 102(3):1041 -- 1048; patents: CN201910430199.4, CN201911016657.6, CN201911016637.9).
Combined with the customization of precursor structure and the formation of excellent fusible soluble material, the laboratory has realized the efficient conversion of SiC precursor into hollow SiC fiber, porous SiC foam with low thermal conductivity, complex 3D-printed SiC components, electrospun SiC fiber, high-strength composite materials, etc. The SiC ceramics transform from "single application type" to "comprehensive service type", realize value maximization, function diversification and product differentiation, and play a promoting role in related fields (Ceram. Int. , 2019, 45(18): 24007 -- 24013; j. Eur. Ceram. Soc. , 2019, 39(6):2028 -- 2035; adv. Appl. Ceram. , 2019,
10.1080/17436753.2019.1707413; patent application: CN201910090356.1).
Recently, on the basis of preliminary laboratory tests, the Advanced Energy Engineering Laboratory has independently designed and successfully built two pilot test platforms: solid and liquid polycarbonate, which lays a solid foundation for the subsequent engineering and application research. The liquid precursor pilot test platform has successfully synthesized the target product of kg polypropylene through operation and debugging.
The above work was supported by the "3315" Innovation team project of Ningbo City, the Strategic Pilot Science and Technology Special Project of the Chinese Academy of Sciences, and the key deployment project of the Chinese Academy of Sciences.
Through the customization of SiC ceramic precursor, the laboratory has conducted in-depth research on the structure design and synthesis process of solid and liquid polypropylenes. Of synthesis of poly (liquid carbon silane with ceramic yield extreme (1000 ℃ under the ceramic yield up to 78%), lengthy storage time (> 6 months), low oxygen content (~ 0.1 wt%), and excellent liquidity (plural viscosity ~ 0.01 Pa s.) characteristics, combining structure design and crosslinking process can realize instant liquid poly carbon silane or minutes stated curing. Solid polycarbonate has the characteristics of low branching degree and excellent spinnability, which can meet the requirements of fiber forming (AppL. Organomet. Chem.,2019; (2) : 33 e4720; int. , 2019, 45(13):16380 -- 16386; soc. , 2019, 102(3):1041 -- 1048; patents: CN201910430199.4, CN201911016657.6, CN201911016637.9).
Combined with the customization of precursor structure and the formation of excellent fusible soluble material, the laboratory has realized the efficient conversion of SiC precursor into hollow SiC fiber, porous SiC foam with low thermal conductivity, complex 3D-printed SiC components, electrospun SiC fiber, high-strength composite materials, etc. The SiC ceramics transform from "single application type" to "comprehensive service type", realize value maximization, function diversification and product differentiation, and play a promoting role in related fields (Ceram. Int. , 2019, 45(18): 24007 -- 24013; j. Eur. Ceram. Soc. , 2019, 39(6):2028 -- 2035; adv. Appl. Ceram. , 2019,
10.1080/17436753.2019.1707413; patent application: CN201910090356.1).
Recently, on the basis of preliminary laboratory tests, the Advanced Energy Engineering Laboratory has independently designed and successfully built two pilot test platforms: solid and liquid polycarbonate, which lays a solid foundation for the subsequent engineering and application research. The liquid precursor pilot test platform has successfully synthesized the target product of kg polypropylene through operation and debugging.
The above work was supported by the "3315" Innovation team project of Ningbo City, the Strategic Pilot Science and Technology Special Project of the Chinese Academy of Sciences, and the key deployment project of the Chinese Academy of Sciences.