Low-temperature connection method of oxide ceramics
A technology of oxide ceramics and connection methods, which is applied in the direction of cement production, etc., and can solve the problems of high energy consumption, high requirements for preparation and assembly, and high equipment requirements
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Embodiment 1
[0053] Embodiment 1 of the present invention provides a low-temperature bonding method for oxide ceramics, the specific steps are as follows:
[0054] 1) Weigh 100 g potassium silicate (containing 88 wt% K 2 O 3.3 SiO 2 , 2 wt% H 2 O, others are oxide impurities), 9.6 g of KOH and 90 g of deionized water, and then mix them uniformly and place them in an oven at 40 °C for 24 h to obtain a transparent base activator;
[0055] 2) Then weigh 7.9 g of metakaolin (which contains 54 wt% SiO 2 , 43 wt% Al 2 o 3 and 3 wt% impurity) and 18.6 g of the alkali activator, the two are mixed in a stirrer, the stirrer speed is 900 r / min, and the stirring time is 10min to obtain a homogeneously mixed geopolymer precursor A;
[0056] 3) The geopolymer precursor A was sealed and placed in an oven at 75 °C for 72 h to cure, the cured geopolymer was ground into fine powder, and then placed in a muffle furnace at 500 °C for 30 min for heat treatment. Obtain granular geopolymer particle reinfor...
Embodiment 2
[0062] Embodiment 2 of the present invention provides a low-temperature bonding method for oxide ceramics, the specific steps are as follows:
[0063] 1) Weigh 100 g potassium silicate (containing 88 wt% K 2 O 3.3 SiO 2 , 2 wt% H 2 O, others are oxide impurities), 8.9 g of KOH and 90 g of deionized water, and then mix them uniformly and place them in an oven at 35 °C for 24 h to obtain a transparent base activator;
[0064] 2) Then weigh 8.5 g metakaolin (which contains 54 wt% SiO 2 , 43 wt% Al 2 o 3 and 3 wt% impurity) and 20.0 g of the base activator, the two are mixed in a stirrer, the stirrer speed is 700 r / min, and the stirring time is 14min to obtain a homogeneously mixed geopolymer precursor A;
[0065] 3) The geopolymer precursor A was sealed and placed in an oven at 60 °C for 64 h to cure. The cured geopolymer was ground into fine powder, and then placed in a muffle furnace at 500 °C for 30 min for heat treatment. Obtain granular geopolymer particle reinforcemen...
Embodiment 3
[0069] Embodiment 3 of the present invention provides a low-temperature bonding method for oxide ceramics, and the specific steps are as follows:
[0070] 1) Weigh 100 g potassium silicate (containing 88 wt% K 2 O 3.3 SiO 2 , 2 wt% H 2 O, others are oxide impurities), 8.2 g of KOH and 70 g of deionized water, and then mix them uniformly and place them in an oven at 30 °C for 12 h to obtain a transparent base activator;
[0071] 2) Then weigh 7.1g of metakaolin (which contains 54 wt% SiO 2 , 43 wt% Al 2 o 3 and 3 wt% impurity) and 18.0 g of the alkali activator, the two are mixed in a stirrer, the stirrer speed is 800 r / min, and the stirring time is 15min to obtain a homogeneously mixed geopolymer precursor A;
[0072] 3) The geopolymer precursor A was sealed and placed in an oven at 55 °C for 48 h to cure, the cured geopolymer was ground into fine powder, and then placed in a muffle furnace at 600 °C for 60 min for heat treatment. Obtain granular geopolymer particle rein...
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Abstract
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