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A special nano-modified adhesive for ceramics and its preparation method
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A nano-modification, adhesive technology, applied in the direction of adhesive types, inorganic adhesives, graft polymer adhesives, etc. Instability and other problems, to achieve the effect of good high temperature resistance and poor stability
Active Publication Date: 2014-10-08
XUANCHENG JINGRUI NEW MATERIAL CO LTD
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Problems solved by technology
Although the nano-adhesive has a high adhesive activity, it is precisely because of this activity that the adhesive itself is unstable, and the self-forming is faster during sintering bonding, and the bonding effect at the fractured bond is not as good as the theoretical design. Such as CN102358827A
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Embodiment 1
[0026] Add 100g of alumina powder to a 500ml flask, add 2.5g of sodium hexametaphosphate and 397.5g of water, sand mill for 1 hour, and transfer the 20% dispersion into a 1000ml flask for polymerization. Add 10.08g of isopropanol, dropwise add 2.04g of acrylic acid and 0.01g of ammonium persulfate, the reaction temperature is 70 degrees, the reaction time is 3 hours, and then raised to 80 degrees for 1 hour. The monomer is removed by filtering through a ceramic membrane, and then dried to obtain an organically modified powder. After modification, 50 g of alumina powder, 4 g of silicon oxide, 1.2 g of zinc oxide, 0.3 g of sodium dodecylbenzenesulfonate, 0.5 g of ammonium polyacrylate, and 0.3 g of sodium hexametaphosphate were subjected to high-speed shearing for 1 hour. That is, the adhesive is obtained.
Embodiment 2
[0028] Add 100g of alumina powder to a 500ml flask, add 2.5g of sodium hexametaphosphate and 397.5g of water, sand mill for 1 hour, and transfer the 20% dispersion into a 1000ml flask for polymerization. Add 20.4g dodemercaptan, dropwise add 2.04g acrylic acid and 0.01g sodium perthiosulfate at the same time, the reaction temperature is 60 degrees, the reaction time is 5 hours, then rise to 75 degrees and react for 1 hour, and remove the monolayer by filtration through a ceramic membrane. body, and dried to obtain an organically modified powder. After modification, 60g of alumina powder, 3g of silicon oxide, 1.0g of magnesium hydroxide, 0.3g of sodium dodecylbenzenesulfonate, 0.6g of ammonium polyacrylate, and 0.4g of sodium hexametaphosphate were subjected to high-speed shearing for 1 hour . That is, the adhesive is obtained.
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Abstract
The invention discloses a special nano modified bonding agent for ceramic. The special nano modified bonding agent comprises the following components by mass percent: 40% to 70% of nano modified alumina, 3 to 8% of nano monox, 1.0% to 2.0% of other nano oxide, and 0.8% to 4.0% of surfactant, powder and other assistant, and water in balancing amount; and the nano modified alumina is the mixture of alumina with the crystal form of Alpha phase and alumina with the crystal form of Theta phase. The invention further discloses a method for preparing the bonding agent. The invention has the advantages that the bonding agent has excellent bonding property and high-temperature resistance and can be applied to the fields of ceramic bonding and repairing, and the like; the preparation method is simple and convenient to operate; and the prepared bonding agent has better effects.
Description
technical field [0001] The invention relates to a special nano-modified adhesive for ceramics and a preparation method, belonging to the technical field of ceramic bonding. Background technique [0002] With the continuous development of science and technology, people have higher and higher requirements for adhesives, especially in terms of high strength, high toughness and heat resistance. With the rapid development of the ceramic industry, the demand and quality requirements for adhesives are becoming more and more stringent, especially in the application field of repairing precious ceramic products, good adhesives can greatly improve the utilization rate of products. [0003] The binders currently used in ceramics are mainly divided into organic binders and inorganic binders. Due to the fact that organic adhesives produce more impurities during heating and curing, and have poor compatibility with the ceramic body, they are generally not cured at more than 400 degrees, su...
Claims
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Application Information
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