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

A nano-silica and nano-porous technology is applied in the field of thermal insulation materials, and can solve the problems of increasing material cost, high cost of nano-silica porous thermal insulation materials, and reducing high-temperature thermal conductivity of nano-silica porous thermal insulation materials. To achieve the effect of improving mechanical properties and improving high temperature thermal insulation performance

Inactive Publication Date: 2014-04-30
SUZHOU SHENGBAOLONG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Effect test

specific Embodiment 1

[0022] The natural vermiculite raw ore of 0.3~2mm is heated and expanded in an extruder furnace at 500°C to form a loose bulk density of 190kg / m 3 expanded vermiculite. The expanded vermiculite after the expansion is 30% by weight, and the specific surface area is 200m 2 The nano-silica per gram is compounded by 70% by weight. The prepared raw materials were premixed in a nano-coating machine at a low speed of 300 rpm for 5 minutes, and then mixed at a high speed of 1400 rpm for 20 minutes to obtain a mixed raw material.

[0023] There are no expanded vermiculite particles in the mixed raw materials, and the expanded vermiculite has been peeled off into micro-nano vermiculite flakes less than 1 mm in size, forming a flaky powder. The mixed raw materials are pressed and molded under a pressure of 2.0 MPa in a molding device equipped with a negative pressure device to obtain the composite nanoporous insulation board of vermiculite and nano silicon dioxide of the present invent...

specific Embodiment 2

[0032] The natural vermiculite raw ore of 0.3~2mm is heated and puffed in an extruder furnace at 850°C to form a loose bulk density of 150kg / m 3 expanded vermiculite. The expanded vermiculite after the expansion is 50% by weight, and the specific surface area is 200m 2 The nano-silica per gram is compounded by 50% by weight. The prepared raw materials were premixed in a nano-coating machine at a low speed of 300 rpm for 5 minutes, and then mixed at a high speed of 1400 rpm for 20 minutes to obtain a mixed raw material.

[0033] There are no expanded vermiculite particles in the mixed raw materials, and the expanded vermiculite has been peeled off into micro-nano vermiculite flakes less than 1 mm in size, forming a flaky powder. The mixed raw materials are pressed and molded under a pressure of 2.0 MPa in a molding device equipped with a negative pressure device to obtain the composite nanoporous insulation board of vermiculite and nano silicon dioxide of the present inventio...

specific Embodiment 3

[0042] The 0.3-2mm natural vermiculite fragments are heated and puffed in the puffing furnace at 900°C to form a loose bulk density of 80kg / m 3 expanded vermiculite. The expanded vermiculite after the expansion is 60% by weight, and the specific surface area is 200m 2 The nano-silica per gram is compounded by 40% by weight. The prepared raw materials were premixed in a nano-coating machine at a low speed of 300 rpm for 5 minutes, and then mixed at a high speed of 1400 rpm for 20 minutes to obtain a mixed raw material.

[0043] There are no expanded vermiculite particles in the mixed raw materials, and the expanded vermiculite has been peeled off into micro-nano vermiculite flakes less than 1 mm in size, forming a flaky powder. The mixed raw materials are pressed and molded under a pressure of 2.0 MPa in a molding device equipped with a negative pressure device to obtain the composite nanoporous insulation board of vermiculite and nano silicon dioxide of the present invention...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B30/00
Inventor 陈德平陈茂峰郑芳姬军陈华
Owner SUZHOU SHENGBAOLONG NEW MATERIAL TECH
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