Vermiculite and nanometer silica composite nanometer multi-hole heat insulation plate and manufacturing method thereof

Abstract

The invention relates to a vermiculite and nanometer silica composite nanometer multi-hole heat insulation plate and a manufacturing method thereof. The manufacturing method comprises the following steps: enabling primary mineral of the vermiculite to be heated and expanded in an expanding furnace to form expanded vermiculite; obtaining 30%-60% expanded vermiculite to be mixed with 40%-70% nanometer silica in a nanometer cladding machine; enabling the expanded vermiculite to be peeled into micro nanometer vermiculite slices which are wrapped by the nanometer silica simultaneously in a mixing process, enabling the micro nanometer vermiculite slices to be not contacted with each other, and obtaining mixing raw materials; and enabling the mixing raw materials to be pressed into heat insulation panels in a forming device. An embodiment providing the vermiculite and nanometer silica composite nanometer multi-hole heat insulation plate and the manufacturing method manufacture a novel heat insulation panel by compositing the vermiculite and the nanometer silica, and improve high temperature heat insulation performance by using the reflection effect of the micro nanometer vermiculite slices on high temperature thermal radiation. Simultaneously, the directional distribution of the micro nanometer vermiculite slices improves the mechanical property of materials.

Description

technical field [0001] The invention relates to the field of heat insulation materials, in particular to a composite nanoporous heat insulation board of vermiculite and nano silicon dioxide and a manufacturing method thereof. Background technique [0002] Nano silica porous thermal insulation material has very small thermal conductivity at room temperature or medium and low temperature, and has good thermal insulation performance. However, the porous nano-silica thermal insulation material is close to "transparent" to high-temperature thermal radiation infrared rays, so the thermal conductivity of the porous nano-silica thermal insulation material is very high in a high-temperature environment, and the porous nano-silica thermal insulation material in a high-temperature environment The thermal insulation performance is seriously affected. Nano-SiO2 porous thermal insulation material (Yang Zichun, Chen Deping. Preparation and thermal insulation properties of SiO2 nano-porous...

AI Technical Summary

Problems solved by technology

[0003] However, it is necessary to add a large amount of opacifying agent to reduce the high-temperature thermal conductivity of the nano-silica porous thermal insulation material, and the price of the opacifying agent is very expensive, which makes the cost of the prepared nano-silica porous thermal insulating material high, which is not conducive to the market of this material open up

In addition, nano-silica porous thermal insulation materials also need to add reinforcing fibers to improve their mechanical properties, further increasing the cost of materials

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