A high-temperature-resistant sandwich structure thermal insulation material with excellent strain performance and its preparation method
A strain performance, sandwich structure technology, applied in chemical instruments and methods, layered products, ceramic layered products, etc., can solve the problems of strain performance (low deformation coordination performance, difficult strain performance, reduced thermal insulation performance, etc., Achieve the effects of excellent deformation coordination performance, low thermal conductivity, and low environmental pollution
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[0027] In a first aspect, the present invention provides a method for preparing a heat-resistant sandwich structure thermal insulation material with excellent strain performance, the method comprising the following steps:
[0028] (1) Combining the high-temperature-resistant panel with the heat-insulating core layer to obtain a prefabricated body;
[0029] (2) impregnating the prefabricated body obtained in step (1) with the sol precursor to obtain a heat-resistant sandwich structure thermal insulation material with excellent strain performance;
[0030] Wherein, the pressure of the immersion is -0.1~1.0MPa (such as -0.1, -0.05, 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.0MPa), the time of the immersion 12 to 72 hours (for example, 12, 24, 36, 48, 60 or 72 hours), and the number of repetitions of the dipping is 1 to 20 times (for example, 1, 3, 5, 10, 15 or 20 times).
[0031] The present invention has no special restrictions on the high-temperature-resistant panel a...
Embodiment 1
[0049] The high-temperature resistant ceramic panel with a thickness ratio of 1:15 and the heat-insulating airgel core layer are combined by stitching to obtain a prefabricated body; the silica sol precursor with a concentration of 16wt% is used under a pressure of 0.1MPa The obtained prefabricated body was dipped and compounded for 12 hours, and the dipping was repeated 15 times to obtain a heat-resistant sandwich structure thermal insulation material with excellent strain performance.
[0050] Test the performance of the heat-resistant sandwich structure insulation material with excellent strain performance obtained in Example 1: density 0.55g / cm 3 (GB / T 6343-2009); room temperature thermal conductivity 0.045W / m K (GB / T 10295-2008); strain is 4500με, deflection is 7.4mm (ASTM C1341-00).
Embodiment 2
[0052] The high-temperature-resistant ceramic panel with a thickness ratio of 1:15 and the heat-insulating airgel core layer are combined by stitching to obtain a prefabricated body; the silica sol precursor with a concentration of 31wt% is used under a pressure of 0.2MPa The obtained prefabricated body was dipped and compounded for 15 hours, and the dipping was repeated 10 times to obtain a heat-resistant sandwich structure thermal insulation material with excellent strain performance.
[0053] Test the performance of the heat-resistant sandwich structure insulation material with excellent strain performance obtained in Example 2: density 0.58g / cm 3 (GB / T 6343-2009); room temperature thermal conductivity 0.049W / m K (GB / T 10295-2008); strain is 4800με, deflection is 8.0mm (ASTM C1341-00).
[0054] Embodiments 3-9 are basically the same as Embodiment 1, and the differences are shown in Table 1.
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