High Level Product Silicon Calcium

A nonlinear parameter estimation method is used to determine the thermal diffusivity of silicon calcium microporous calcium silicate insulation materials. Firstly, the thermal insulation material was sandwiched between two metal sheets to make a sandwich structure sample, and the temperature rise on the back of the sample was measured by the laser pulse method. Then, the thermal diffusivity of the insulation material is estimated by fitting the theoretical temperature rise curve with the experimental temperature rise curve. The thermal diffusivity, heat dissipation coefficient and energy absorbed by the specimen can be estimated simultaneously by using nonlinear parameter estimation. Through experiments, it was determined that the optimal thickness of the thermal diffusivity measurement was 1.6~1.9mm. The measurement error caused by the thickness accuracy of the specimen and the contact thermal resistance is within 5.8%.

1.A method for preparing microporous hard silicon calcium thermal insulation material in situ, which is characterized in that: process characteristics: quicklime is digested and filtered into lime slurry, mixed and stirred together with siliceous raw materials, water and cut fibers, and all raw materials for synthetic hard calcium silicate are directly placed in the mold for static hydrothermal reaction, so as to directly generate the hard calcium silicate body of the required size and shape, and then the product with small bulk density, excellent thermal insulation performance and considerable strength can be obtained only by curing by drying; The preparation process parameters are: molding temperature: 180-250 °C, pressure: 18-1-40atm, water/solid ratio, 8-1-40:1; The present invention adopts inorganic silicate fiber as alkali-resistant glass fiber, ceramic fiber rrrrn and carbon fiber; The siliceous raw material is colloidal silica. The drying and curing temperature of the present invention is: 60-100 °C.

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