CN101307858A - Lower thermal conductivity heat-barrier material and method for making same - Google Patents
Lower thermal conductivity heat-barrier material and method for making same Download PDFInfo
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- CN101307858A CN101307858A CNA2008101380248A CN200810138024A CN101307858A CN 101307858 A CN101307858 A CN 101307858A CN A2008101380248 A CNA2008101380248 A CN A2008101380248A CN 200810138024 A CN200810138024 A CN 200810138024A CN 101307858 A CN101307858 A CN 101307858A
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- potassium titanate
- crystal whisker
- composite heat
- basalt fibre
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Abstract
The invention relates to a composite insulating material with low thermal conductivity and a method for making the same, which belongs to the insulating material technical field. The compositions in portion by weight of the composite insulating material are: 45 to 65 portions of basalt fiber, 10 to 35 portions of potassium hexatitanate whiskers, 5 to 20 portions of bonding agents and 2 to 8 portions of addition agents, which are all portions by weight. The method comprises the following steps of: putting the basalt fiber in water and stirring to paste, adding the potassium hexatitanate whiskers, the bonding agents and the addition agents, making into a floccule, molding and drying to obtain the composite insulating material. The insulating material of the invention has the advantages of low thermal conductivity which is 0.030 to 0.054W/ m.K) at a temperature of between 200 and 800 DEG C, and is suitable for use under the temperature of 1000 DEG C.
Description
Technical field
The present invention relates to a kind of lower thermal conductivity basalt fibre/crystal whisker of hexa potassium titanate combined high temperature thermal-protective material and preparation method thereof, belong to the thermal-protective material technical field.
Background technique
The inorfil material has low density, high heat capacity, low heat conduction and resistant to elevated temperatures outstanding feature, is widely used in fields such as chemical industry, metallurgy, building materials, national defence.Mainly be aluminum silicate fiber, basalt fibre, glass fibre, rock wool etc. at the inorfil class thermal-protective material that uses below 1200 ℃ at present, comprise various products such as cellucotton, fibrofelt, tapetum fibrosum, fender paper, textile rope.This class material in use has stable high temperature insulating performance and chemerosiveness resistent.Yet the thermal conductivity of single inorfil goods is higher relatively, can not satisfy the requirement of many applications.
Basalt fibre is to be raw material with the basalt mineral, the lamination coating that makes through technologies such as high temperature melting, wire drawing or winding-ups.Basalt belongs to the volcano extrusive rock, be to exist on the earth and one of the widest mineral that distribute, so the basalt fibre raw material sources is extensive.Basalt fibre is environmental sound in the process of founding, no industrial refuse, and be parent soil material after decomposing, natural degradation can not cause secondary pollution.The Xie Er lid waits thinks that the basalt fibre goods possess thermal insulation properties, and this class material does not fire, and can not decomposite harmful gas during heating, and operating temperature can reach 600～700 ℃, and operating temperature can reach 1000 ℃ when using with other match materials.Referring to fibrous composite, 9[3] (2003): 17-19.
Crystal whisker of hexa potassium titanate has lower thermal conductivity, but this material is a powdered substance, is difficult to be directly used in the insulation occasion.Publication number CN1772712 (application number 200510104227.1) aluminum silicate fiber/crystal whisker of hexa potassium titanate composite heat-insulated material is present inventor's invention in one's early years, be to adopt aluminum silicate fiber and the compound composite heat-insulated materials of having invented a kind of use under 1200 ℃ of crystal whisker of hexa potassium titanate, thermal conductivity is 0.04～0.09W/ (m.K).Yet the thermal conductivity of above-mentioned composite heat-insulated material is still higher, can not satisfy the usage requirement of some special equipment under harsh conditions.
Summary of the invention
At the deficiencies in the prior art, the invention provides a kind of basalt fibre/crystal whisker of hexa potassium titanate composite heat-insulated material and preparation method thereof, make a kind of combined high temperature thermal-protective material of low density and low thermal conductivity, to satisfy the heat insulation demand of special equipment.
The component of composite heat-insulated material of the present invention is as follows: 45～65 parts of basalt fibres, and 10～35 parts of crystal whisker of hexa potassium titanate, 5～20 parts of bonds, 2～8 parts of auxiliary agents are weight portion.
The weight percentage component of described basalt fibre is: Al
2O
312～16%, SiO
245～48%, CaO8～11%, MgO 3～5%, K
2O 0.8～1.4%, Na
2O 2～3%, Fe
2O
35～7%, FeO 5～7%, TiO
22～4%, surplus impurity.
Described bond is selected from one or more in Ludox, starch or the polyvinyl alcohol; Described auxiliary agent is aluminium polychloride and acid amides by weight 1-2: 1 combination.
Preferably, above-mentioned basalt fibre is short superfine fibre diameter 1～3 μ m that cuts, long 200～1000 μ m.
Preferably, the diameter of above-mentioned crystal whisker of hexa potassium titanate is 2～4 μ m, and slenderness ratio is 10～20.
Basalt fibre of the present invention/crystal whisker of hexa potassium titanate composite heat-insulated material preparation method, step is as follows:
1, basalt fibre is added in the entry, fully stir, form slurry.
2, add crystal whisker of hexa potassium titanate, when stirring, add bond, auxiliary agent successively.Slurry forms floccule gradually.When liquid in the slurry is become when limpid by muddiness, illustrate that crystal whisker of hexa potassium titanate is fully attached to fiber surface.
3, be ferreted out floccule and moulding, oven dry can make basalt fibre/crystal whisker of hexa potassium titanate composite heat-insulated material.
Above-mentioned moulding can be selected paper mold, template or piece type as required, makes composite heat-insulated material fender paper, plate or composite heat-insulated material fiber block.
The present invention utilizes six potassium titanate lower thermal conductivities and has negative temperature coefficient and the characteristic of high infrared reflection, is compounded to form the combined high temperature thermal-protective material of low density and low thermal conductivity with basalt fibre.Lower thermal conductivity combined high temperature thermal-protective material of the present invention is to be base material with the basalt fibre, is additive with the crystal whisker of hexa potassium titanate, by adding bond and auxiliary agent, through slurrying, join operations such as slurry, moulding, oven dry, the thermal-protective material of making.Compared with prior art, thermal-protective material of the present invention has the characteristics of lower thermal conductivity, is 0.03～0.054W/ (mK) 200～800 ℃ thermal conductivities, can use 1000 ℃ of following temperature occasions.
Embodiment
The invention will be further described below in conjunction with embodiment, but be not limited thereto.The weight percentage component of used described basalt fibre is among the embodiment: Al
2O
312～16%, SiO
245～48%, CaO 8～11%, MgO3～5%, K
2O 0.8～1.4%, Na
2O 2～3%, Fe
2O
35～7%, FeO 5～7%, TiO
22～4%, surplus impurity.Described basalt fibre is a superfine fibre, diameter 1～3 μ m, long 200～1000 μ m.The diameter of described crystal whisker of hexa potassium titanate is 2～4 μ m, and slenderness ratio is 10～20.
Embodiment 1: the component of thermal-protective material is as follows, is weight portion:
50 parts of basalt fibres, 20 parts of crystal whisker of hexa potassium titanate, bond: 1 part of 10 parts of starch and polyvinyl alcohol, 6 parts of the auxiliary agents that aluminium polychloride and acid amides were formed by weight 1: 1.
The preparation method is as follows:
50 parts of basalt fibres are joined in 200 parts of water, stir, form slurry.Subsequently, add 20 parts of crystal whisker of hexa potassium titanate, when stirring, add 1 part of 10 parts of starch and polyvinyl alcohol one by one, 3 parts of aluminium polychlorides, 3 parts of acid amides.Liquid is become when limpid by muddiness in slurry, and floccule is ferreted out, and moulding in 70 ℃ of oven dry, makes basalt fibre/crystal whisker of hexa potassium titanate Combined thermal insulative panel.
200 ℃ of thermal conductivities of this Combined thermal insulative panel are 0.030W/ (mK), and 800 ℃ of thermal conductivities are 0.050W/ (mK).
Embodiment 2: as described in embodiment 1, different is that component is as follows, is weight portion:
60 parts of basalt fibres, 30 parts of crystal whisker of hexa potassium titanate, 8 parts of Ludox, 8 parts of starch, 2 parts of polyvinyl alcohol, 4 parts of aluminium polychlorides, 3 parts of acid amides.
The preparation method is with embodiment 1, and Ludox joins in the slurry before starch and polyvinyl alcohol adding.The gained Combined thermal insulative panel has higher intensity, and 200 ℃ of thermal conductivities are 0.036W/ (mK), and 800 ℃ of thermal conductivities are 0.054W/ (m.K).
Embodiment 3: as described in embodiment 1, different is that component is as follows, is weight portion:
40 parts of basalt fibres, 10 parts of crystal whisker of hexa potassium titanate, 12 parts of starch, 5 parts of aluminium polychlorides, 3 parts of acid amides.200 ℃ of thermal conductivities of gained composite heat-insulated material are 0.033W/ (mK), and 800 ℃ of thermal conductivities are 0.052W/ (m.K).
Claims (4)
1. composite heat-insulated material is characterized in that component is as follows:
45～65 parts of basalt fibres, 10～35 parts of crystal whisker of hexa potassium titanate, 5～20 parts of bonds, 2～8 parts of auxiliary agents are weight portion;
The weight percentage component of described basalt fibre is: Al
2O
312～16%, SiO
245～48%, CaO8～11%, MgO 3～5%, K
2O 0.8～1.4%, Na
2O 2～3%, Fe
2O
35～7%, FeO 5～7%, TiO
22～4%, surplus impurity;
Described bond is selected from one or more in Ludox, starch or the polyvinyl alcohol; Described auxiliary agent is aluminium polychloride and acid amides by weight 1-2: 1 combination.
2. composite heat-insulated material as claimed in claim 1 is characterized in that described basalt fibre is ultra-fine chopped strand, fiber diameter 1～3 μ m, long 200～1000 μ m.
3. composite heat-insulated material as claimed in claim 1, the diameter that it is characterized in that described crystal whisker of hexa potassium titanate are 2～4 μ m, and slenderness ratio is 10～20.
4. the preparation method of the described composite heat-insulated material of claim 1, step is as follows:
(1) basalt fibre is added in the entry, stir, form slurry;
(2) add crystal whisker of hexa potassium titanate, when stirring, add bond and auxiliary agent successively,, floccule is ferreted out when liquid in the slurry is become when limpid by muddiness;
(3) with the floccule moulding that is ferreted out, oven dry promptly gets basalt fibre/crystal whisker of hexa potassium titanate composite heat-insulated material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101380248A CN100543352C (en) | 2008-06-30 | 2008-06-30 | A kind of lower thermal conductivity heat-barrier material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101380248A CN100543352C (en) | 2008-06-30 | 2008-06-30 | A kind of lower thermal conductivity heat-barrier material and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101307858A true CN101307858A (en) | 2008-11-19 |
| CN100543352C CN100543352C (en) | 2009-09-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982442A (en) * | 2010-10-27 | 2011-03-02 | 朱奎 | Heat reserving brick for curing room |
| CN103090157A (en) * | 2013-02-05 | 2013-05-08 | 山东华德隆建材科技有限公司 | Vacuum heat insulation plate and preparation method thereof |
| CN107162559A (en) * | 2017-06-16 | 2017-09-15 | 成都市容德建筑劳务有限公司 | A kind of mixed mud of heat-insulating |
-
2008
- 2008-06-30 CN CNB2008101380248A patent/CN100543352C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982442A (en) * | 2010-10-27 | 2011-03-02 | 朱奎 | Heat reserving brick for curing room |
| CN101982442B (en) * | 2010-10-27 | 2012-09-12 | 朱奎 | Heat reserving brick for curing room |
| CN103090157A (en) * | 2013-02-05 | 2013-05-08 | 山东华德隆建材科技有限公司 | Vacuum heat insulation plate and preparation method thereof |
| CN103090157B (en) * | 2013-02-05 | 2015-08-19 | 山东华德隆建材科技有限公司 | A kind of vacuum heat-insulating plate and preparation method thereof |
| CN107162559A (en) * | 2017-06-16 | 2017-09-15 | 成都市容德建筑劳务有限公司 | A kind of mixed mud of heat-insulating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100543352C (en) | 2009-09-23 |
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Granted publication date: 20090923 Termination date: 20120630 |