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Low-temperature foam glass thermal insulation material and preparation method thereof

A technology of foam glass and thermal insulation materials, applied in the field of low-temperature foam glass thermal insulation materials and its preparation, can solve the problems of uneven bubble diameter, uneven distribution, and poor chemical stability of porous materials, and achieve low water absorption, uniform distribution, and low cost. cheap effect

Inactive Publication Date: 2012-11-28
宁波荣山新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The porous material obtained by foaming or freely foaming water glass modified without adding other raw materials has extremely poor chemical stability, and the pore structure has defects such as non-uniform cell diameter and uneven distribution.

Method used

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  • Low-temperature foam glass thermal insulation material and preparation method thereof
  • Low-temperature foam glass thermal insulation material and preparation method thereof
  • Low-temperature foam glass thermal insulation material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A series of experiments were carried out using liquid sodium silicate with a modulus M=3.3 and a solid content of 35% and boric acid as raw materials. The specific raw material proportions and main component mass fractions in formulas A, B, C, and D are shown in the table below:

[0039]

[0040] The raw materials of each formula were mixed evenly with forced stirring to obtain a high-viscosity sol system without gelling; then the sol system of each formula was dried at 120°C for 12 hours to obtain an intermediate material with a moisture content of about 30%. ; In order to finally obtain the same bulk density of different formulas (the bulk density of low-temperature foam glass is controllable, the design bulk density here is about 160kg / m 3 ) low-temperature foam glass samples, and then put the broken intermediate materials of each formula into the mold, seal the mold and move it into the oven; finally, the temperature was raised to 300°C at a rate of 10°C / min and ...

Embodiment 2

[0047] The experiment was carried out with liquid sodium silicate with a modulus M=3.3 and a solid content of 35%, boric acid and aluminum dihydrogen phosphate. The formula by weight is water glass: boric acid: aluminum dihydrogen phosphate = 100: 4: 2, and the mass fraction of the main components in the raw materials is: SiO 2 70.32%, B 2 o 3 5.13%, Al 2 o 3 2.53%, Na 2 O 22.02%.

[0048] The raw materials according to the above proportions were mixed evenly with forced stirring, and a high-viscosity sol system was obtained without gelling; then, the sol system of each formula was dried at 100°C for 8 hours to obtain a sol system with a moisture content of about 25%. Intermediate material; then put the crushed intermediate material of each formula into the mold, seal the mold and move it into the oven; finally raise the temperature to 300°C at a rate of 15°C / min and keep it warm for 5h, then cool down at a cooling rate of 10°C / min to room temperature to obtain low-te...

Embodiment 3

[0053] The experiment was carried out with liquid sodium silicate with modulus M=3.3 and solid content of 35%, boric acid and KOH as raw materials. The formula by weight is water glass: boric acid: KOH=10:4.51:3, and the mass fraction of main components in raw materials is: SiO 2 63.42%, B 2 o 3 6.06%, (Na 2 O+K 2 O) 30.52%.

[0054] The raw materials according to the above proportions were mixed evenly with forced stirring, and a high-viscosity sol system was obtained without gelling; then, the sol system of each formula was dried at 110°C for 16 hours to obtain a sol system with a moisture content of about 40%. Intermediate material; then put the same amount of intermediate material of each formula after crushing into the mold, seal the mold and move it into the oven; finally raise the temperature to 300 °C at a rate of 5 °C / min and keep it for 2 hours, and drop the temperature at a cooling rate of 2 °C / min to room temperature to obtain low-temperature foam glass.

...

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Abstract

The invention relates to a low-temperature foam glass thermal insulation material and a preparation method thereof, and the foam glass thermal insulation material comprises the following components by mass fraction: 40-80% of SiO2, 0-16% of B2O3, 0-10% of Al2O3, and 10-40% of R2O, wherein R2O is alkali metal oxide; the preparation method comprises the following steps: (1) well mixing water glass with one or more than one of boron-containing raw materials, aluminium-containing raw materials, and an alkali of ROH under stirring so as to obtain a sol system without gelation; (2) drying the sol system to obtain an intermediate material with a water content of 25-50%; (3) performing fragmentation processing of the obtained intermediate material, and then performing foaming heat treatment under a closed condition. The low-temperature foam glass of the invention has good mechanical strength, low water absorption, and a small coefficient of heat conductivity, and can be used as an excellent thermal insulation material; the preparation technology of the invention is simple in process, low in cost, energy saving and environment-friendly, and applicable to industrial production.

Description

technical field [0001] The invention belongs to the field of foam glass thermal insulation material and its preparation, in particular to a low-temperature foam glass thermal insulation material and its preparation method. Background technique [0002] In recent years, fires involving building external insulation materials have successively occurred in Nanjing Central International Plaza, Harbin Jingwei 360-degree Twin Star Building, Jinan Olympic Sports Center, Beijing CCTV New Site Affiliated Cultural Center, Shanghai Jiaozhou Teachers' Apartment, Shenyang Dynasty Wanxin Building, etc., causing serious casualties. Casualties and property losses, building flammable and combustible external insulation materials have become a new type of fire hazard, and the resulting fires have shown a tendency to occur frequently. The Ministry of Public Security and the Ministry of Housing and Urban-Rural Development issued the "Interim Provisions on Fire Protection of Civil Building Extern...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 高锦秀王智宇屠浩驰王小山阮华李陆宝
Owner 宁波荣山新型材料有限公司
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