Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-thermal-conductivity refractory adhesive for connecting ceramic and metal and preparation method of high-thermal-conductivity refractory adhesive
The invention discloses a high-thermal-conductivity refractory adhesive for connecting ceramic and metal and a preparation method thereof, and is characterized in that the high-thermal-conductivity refractory adhesive takes a high-thermal-conductivity hexagonal crystal SiC nano ceramic powder material as an aggregate, and takes aluminum silicate (the purity is greater than 95%), kaolin and a corrosion-resistant filler (sodium aluminosilicate or potassium aluminosilicate) as powder; the adhesive is prepared from potassium silicate/sodium silicate water glass and a proper amount of inorganic curing agent (including sodium fluosilicate, phosphorus pentoxide and the like) according to a ratio at normal temperature, and is cross-linked and cured to form a viscous colloid. By controlling the proportion of the nano SiC and designing the gradient binder layer, the gradient change of the thermal expansion coefficient of the binder is realized, and the interface stress generated by the difference of the thermal expansion coefficients between the ceramic and the metal is reduced. The preparation method comprises the following steps: 1, the high-thermal-conductivity refractory binder is prepared by mixing water glass, powder, aggregate, a curing agent and the like according to a certain proportion; 2, according to the requirements of furnace tube material and binder performance (breaking strength, bonding strength, thermal shrinkage rate, fire resistance, corrosion resistance and the like), the proper proportion (mass ratio) is determined: 80 parts of potassium silicate or sodium silicate water glass, 20-80 parts of SiC nano powder, 20-60 parts of mixed powder of aluminum silicate, kaolin and corrosion-resistant filler (1: 1: 1), and 10-35 parts of curing agent. And 3, uniformly mixing the powder, the aggregate and the inorganic curing agent in proportion by adopting a weight method, adding the water glass, and continuously stirring until no caking exists. The binder material is high in bonding strength and heat conduction efficiency, has the advantages of thermal shock resistance, flame retardance, water resistance, fire resistance, wear resistance, corrosion resistance and the like, can realize high-temperature connection between ceramic and metal, is particularly suitable for bonding of the metal inner wall of high-temperature equipment and a ceramic lining plate, and prolongs the service life of the high-temperature equipment.
本发明公开了一种陶瓷与金属连接高导热耐火粘结剂及制备方法，其特征在于：它以高导热六方晶型SiC纳米陶瓷粉末材料为骨料，以硅酸铝（纯度＞95%）、高岭土及耐腐蚀填料（铝硅酸钠或铝硅酸钾）为粉料，在常温下与硅酸钾/硅酸钠水玻璃和适量无机固化剂（包括氟硅酸钠、五氧化二磷等）按比例配制，交联固化形成粘性胶体。通过控制纳米SiC的比例及设计梯度粘结剂层，实现粘结剂热膨胀系数梯度变化，降低陶瓷与金属间因热膨胀系数差别产生的界面应力。其制备方法：1.高导热耐火粘结剂采用水玻璃、粉料、骨料、固化剂等按一定比例配合而成。2.结合炉管材料及粘结剂性能（抗折强度、粘结强度、热收缩率、耐火性、耐腐蚀性等）要求，确定适当配比（质量比）为：硅酸钾或硅酸钠水玻璃80份、SiC纳米粉20‑80份、硅酸铝、高岭土及耐腐蚀填料的混合粉（1：1：1）20‑60份、固化剂10‑35份。3.采用重量法将粉料、骨料和无机固化剂按比例混合均匀，加入水玻璃并不断搅拌至无结块为止。这种粘结剂材料不但粘结强度和导热效率高，而且具有抗热震、阻燃、耐水、耐火、耐磨、耐腐蚀等优点，可实现陶瓷与金属之间的高温连接，尤其适于高温设备金属内壁与陶瓷衬板的粘结，实现高温设备的延寿。
High-thermal-conductivity refractory adhesive for connecting ceramic and metal and preparation method of high-thermal-conductivity refractory adhesive
The invention discloses a high-thermal-conductivity refractory adhesive for connecting ceramic and metal and a preparation method thereof, and is characterized in that the high-thermal-conductivity refractory adhesive takes a high-thermal-conductivity hexagonal crystal SiC nano ceramic powder material as an aggregate, and takes aluminum silicate (the purity is greater than 95%), kaolin and a corrosion-resistant filler (sodium aluminosilicate or potassium aluminosilicate) as powder; the adhesive is prepared from potassium silicate/sodium silicate water glass and a proper amount of inorganic curing agent (including sodium fluosilicate, phosphorus pentoxide and the like) according to a ratio at normal temperature, and is cross-linked and cured to form a viscous colloid. By controlling the proportion of the nano SiC and designing the gradient binder layer, the gradient change of the thermal expansion coefficient of the binder is realized, and the interface stress generated by the difference of the thermal expansion coefficients between the ceramic and the metal is reduced. The preparation method comprises the following steps: 1, the high-thermal-conductivity refractory binder is prepared by mixing water glass, powder, aggregate, a curing agent and the like according to a certain proportion; 2, according to the requirements of furnace tube material and binder performance (breaking strength, bonding strength, thermal shrinkage rate, fire resistance, corrosion resistance and the like), the proper proportion (mass ratio) is determined: 80 parts of potassium silicate or sodium silicate water glass, 20-80 parts of SiC nano powder, 20-60 parts of mixed powder of aluminum silicate, kaolin and corrosion-resistant filler (1: 1: 1), and 10-35 parts of curing agent. And 3, uniformly mixing the powder, the aggregate and the inorganic curing agent in proportion by adopting a weight method, adding the water glass, and continuously stirring until no caking exists. The binder material is high in bonding strength and heat conduction efficiency, has the advantages of thermal shock resistance, flame retardance, water resistance, fire resistance, wear resistance, corrosion resistance and the like, can realize high-temperature connection between ceramic and metal, is particularly suitable for bonding of the metal inner wall of high-temperature equipment and a ceramic lining plate, and prolongs the service life of the high-temperature equipment.
本发明公开了一种陶瓷与金属连接高导热耐火粘结剂及制备方法，其特征在于：它以高导热六方晶型SiC纳米陶瓷粉末材料为骨料，以硅酸铝（纯度＞95%）、高岭土及耐腐蚀填料（铝硅酸钠或铝硅酸钾）为粉料，在常温下与硅酸钾/硅酸钠水玻璃和适量无机固化剂（包括氟硅酸钠、五氧化二磷等）按比例配制，交联固化形成粘性胶体。通过控制纳米SiC的比例及设计梯度粘结剂层，实现粘结剂热膨胀系数梯度变化，降低陶瓷与金属间因热膨胀系数差别产生的界面应力。其制备方法：1.高导热耐火粘结剂采用水玻璃、粉料、骨料、固化剂等按一定比例配合而成。2.结合炉管材料及粘结剂性能（抗折强度、粘结强度、热收缩率、耐火性、耐腐蚀性等）要求，确定适当配比（质量比）为：硅酸钾或硅酸钠水玻璃80份、SiC纳米粉20‑80份、硅酸铝、高岭土及耐腐蚀填料的混合粉（1：1：1）20‑60份、固化剂10‑35份。3.采用重量法将粉料、骨料和无机固化剂按比例混合均匀，加入水玻璃并不断搅拌至无结块为止。这种粘结剂材料不但粘结强度和导热效率高，而且具有抗热震、阻燃、耐水、耐火、耐磨、耐腐蚀等优点，可实现陶瓷与金属之间的高温连接，尤其适于高温设备金属内壁与陶瓷衬板的粘结，实现高温设备的延寿。
High-thermal-conductivity refractory adhesive for connecting ceramic and metal and preparation method of high-thermal-conductivity refractory adhesive
一种陶瓷与金属连接高导热耐火粘结剂及制备方法
CHEN JI (Autor:in) / LI XIQI (Autor:in) / SU MINGBIN (Autor:in)
28.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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