CN107032818A - A kind of heat-insulation and heat-preservation ceramics and preparation method thereof - Google Patents
A kind of heat-insulation and heat-preservation ceramics and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of heat-insulation and heat-preservation ceramics and preparation method thereof, it is related to ceramic field；The making raw material of heat-insulation and heat-preservation ceramics is：Expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene, magnesite, zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, sesbania powder, potassium carbonate, sodium metasilicate, lauryl sodium sulfate, alumina fibre part and rare earth oxide；The present invention to raw material and preparation method by optimizing improvement, make the features such as obtained ceramics have porosity height, low thermal conductivity factor, good heat insulating and high mechanical strength, after testing, the ceramics porosity of the invention is 62.77 65.89%, average pore size is 48 50 μm, thermal conductivity factor is 0.1 0.15W (mK), and compression strength is 170.76 173.18MPA.
Description
【Technical field】
The present invention relates to ceramic field, and in particular to a kind of heat-insulation and heat-preservation ceramics and preparation method thereof.
【Background technology】
Due to the shortage and the increase of demand for energy of resource, heat preserving and insulating material is more next as a kind of energy-conserving and environment-protective material
It is taken seriously.Heat-insulation and heat-preservation wide variety on current market, mainly with asbestos board, sepiolite, alumina silicate fibre, crushed crude pearlite
It is primary raw material Deng material, there is certain effect, occupancy volume is larger, although some possess high porosity, but gas cell distribution
It is uneven, and bad mechanical strength.
【The content of the invention】
In view of the above-mentioned problems, the technical problem to be solved in the present invention is to provide a kind of heat-insulation and heat-preservation ceramics and its making side
Method, the features such as ceramics produced by the present invention have porosity height, low thermal conductivity factor, good heat insulating and high mechanical strength.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of heat-insulation and heat-preservation ceramics, are prepared from the following raw materials in parts by weight：50-60 parts of expanded perlite, mullite 24-
30 parts, 29-36 parts of clay, 18-23 parts of dolomite, 12-16 parts of potassium feldspar, 10-14 parts of spodumene, 6-9 parts of magnesite, zirconium oxide
1-3 parts, 3-7 parts of boron nitride, 10-15 parts of calcium oxide, 4-9 parts of magnesia, 2-4 parts of carboxymethyl cellulose, 18-26 parts of sesbania powder,
5-9 parts of potassium carbonate, 1-5 parts of sodium metasilicate, 0.9-1.7 parts of lauryl sodium sulfate, 0.5-0.9 parts of alumina fibre and rare-earth oxidation
0.4-0.8 parts of thing.
Preferably, a kind of heat-insulation and heat-preservation ceramics, are prepared from the following raw materials in parts by weight：55 parts of expanded perlite, Mo Lai
28 parts of stone, 34 parts of clay, 20 parts of dolomite, 14 parts of potassium feldspar, 13 parts of spodumene, 7 parts of magnesite, 2 parts of zirconium oxide, boron nitride 5
Part, 13 parts of calcium oxide, 6 parts of magnesia, 3 parts of carboxymethyl cellulose, 22 parts of sesbania powder, 8 parts of potassium carbonate, 2 parts of sodium metasilicate, dodecane
0.6 part of 1.4 parts of base sodium sulphate, 0.7 part of alumina fibre and rare earth oxide.
Further, the rare earth oxide is one kind in cerium oxide, lanthana or luteium oxide.
According to above-mentioned formula, the present invention also provides a kind of preparation method of heat-insulation and heat-preservation ceramics, comprises the following steps：
(1) each raw material is weighed by above-mentioned parts by weight；
(2) by expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene and magnesite at 800-950 DEG C
After together calcining 60-70 minutes, fineness is crushed to for 300-400nm, mixed powder A is obtained；
(3) by zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, potassium carbonate, sodium metasilicate, dodecyl
Sodium sulphate, alumina fibre and rare earth oxide at 1200-1250 DEG C in together calcining after 40-60 minutes, and being crushed to fineness is
320-340nm, obtains mixed powder B；
(4) by above-mentioned mixed powder A, mixed powder B and sesbania powder and the mixed powder A, mixed powder B and sesbania powder
Gross weight 80-90% water is mixed, and adjusts pH value for after 9-10, old 1-2 days of sealing and standing obtains old pug；
(5) by above-mentioned old pug in base substrate is made under 3000-4000kN pressure, by base substrate in dry at 200-250 DEG C
After dry 35-45 minutes, fired 70-80 minutes in the case where temperature is 1090-1100 DEG C, and be incubated 60-75 minutes, you can obtain described
Ceramics.
Further, in step (4), the old temperature is 30-35 DEG C, and humidity is 90-95%.
Further, in step (5), the firing is to carry out under reducing atmosphere.
Compared with prior art, the present invention has the advantages that：
The present invention makes obtained ceramics have porosity height, heat conduction by optimizing improvement to raw material and preparation method
Coefficient is low, good heat insulating and the features such as high mechanical strength, and after testing, the present invention ceramics porosity is 62.77-65.89%, is put down
Equal aperture is 48-50 μm, and thermal conductivity factor is 0.1-0.15W (mK), and compression strength is 170.76-173.18MPA.Wherein, oxygen
The addition for changing zirconium, boron nitride, calcium oxide and magnesia enhances the heat resistance and mechanical strength of ceramics；Carboxymethyl cellulose, field
Cyanines powder, potassium carbonate, sodium metasilicate and lauryl sodium sulfate, which are together calcined, adds the porosity；Meanwhile, alumina fibre surface is lived
Property is good, and thermal conductivity agent thermal coefficient of expansion is low, and thermal conductivity factor is reduce further with above-mentioned material collective effect, makes thermal insulation separation thermal effect
Fruit is more notable.
【Embodiment】
The embodiment to the present invention is described further with reference to embodiments.
Embodiment 1
A kind of heat-insulation and heat-preservation ceramics of the present embodiment, are prepared from the following raw materials in parts by weight：50 parts of expanded perlite, Mo Lai
24 parts of stone, 29 parts of clay, 18 parts of dolomite, 12 parts of potassium feldspar, 10 parts of spodumene, 6 parts of magnesite, 1 part of zirconium oxide, boron nitride 3
Part, 10 parts of calcium oxide, 4 parts of magnesia, 2 parts of carboxymethyl cellulose, 18 parts of sesbania powder, 5 parts of potassium carbonate, 1 part of sodium metasilicate, dodecane
0.4 part of 0.9 part of base sodium sulphate, 0.5 part of alumina fibre and cerium oxide.
A kind of preparation method of heat-insulation and heat-preservation ceramics of the present embodiment, comprises the following steps：
(1) each raw material is weighed by above-mentioned parts by weight；
(2) by expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene and magnesite at 800 DEG C together
After calcining 70 minutes, fineness is crushed to for 300-400nm, mixed powder A is obtained；
(3) by zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, potassium carbonate, sodium metasilicate, dodecyl
Sodium sulphate, alumina fibre and rare earth oxide are crushed to fineness for 320- in together being calcined after 60 minutes at 1200 DEG C
340nm, obtains mixed powder B；
(4) by above-mentioned mixed powder A, mixed powder B and sesbania powder and the mixed powder A, mixed powder B and sesbania powder
The water of gross weight 80% is mixed, and adjusts pH value for after 9, old 1 day of sealing and standing, old temperature is 35 DEG C, and humidity is 90%,
Obtain old pug；
(5) by above-mentioned old pug in base substrate is made under 3000kN pressure, by base substrate in dry 45 minutes at 200 DEG C
Afterwards, fired 80 minutes in the case where temperature is 1090 DEG C of reducing atmosphere, and be incubated 60 minutes, you can obtain the ceramics.
Embodiment 2
A kind of heat-insulation and heat-preservation ceramics of the present embodiment, are prepared from the following raw materials in parts by weight：60 parts of expanded perlite, Mo Lai
30 parts of stone, 36 parts of clay, 23 parts of dolomite, 16 parts of potassium feldspar, 14 parts of spodumene, 9 parts of magnesite, 3 parts of zirconium oxide, boron nitride 7
Part, 15 parts of calcium oxide, 9 parts of magnesia, 4 parts of carboxymethyl cellulose, 26 parts of sesbania powder, 9 parts of potassium carbonate, 5 parts of sodium metasilicate, dodecane
0.8 part of 1.7 parts of base sodium sulphate, 0.9 part of alumina fibre and lanthana.
A kind of preparation method of heat-insulation and heat-preservation ceramics of the present embodiment, comprises the following steps：
(1) each raw material is weighed by above-mentioned parts by weight；
(2) by expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene and magnesite at 950 DEG C together
After calcining 60 minutes, fineness is crushed to for 300-400nm, mixed powder A is obtained；
(3) by zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, potassium carbonate, sodium metasilicate, dodecyl
Sodium sulphate, alumina fibre and rare earth oxide are crushed to fineness for 320- in together being calcined after 40 minutes at 1250 DEG C
340nm, obtains mixed powder B；
(4) by above-mentioned mixed powder A, mixed powder B and sesbania powder and the mixed powder A, mixed powder B and sesbania powder
The water of gross weight 90% is mixed, and adjusts pH value for after 10, old 2 days of sealing and standing, old temperature is 30 DEG C, and humidity is
95%, obtain old pug；
(5) by above-mentioned old pug in base substrate is made under 4000kN pressure, by base substrate in dry 35 minutes at 250 DEG C
Afterwards, fired 70 minutes in the case where temperature is 1100 DEG C of reducing atmosphere, and be incubated 75 minutes, you can obtain the ceramics.
Embodiment 3
A kind of heat-insulation and heat-preservation ceramics of the present embodiment, are prepared from the following raw materials in parts by weight：55 parts of expanded perlite, Mo Lai
28 parts of stone, 34 parts of clay, 20 parts of dolomite, 14 parts of potassium feldspar, 13 parts of spodumene, 7 parts of magnesite, 2 parts of zirconium oxide, boron nitride 5
Part, 13 parts of calcium oxide, 6 parts of magnesia, 3 parts of carboxymethyl cellulose, 22 parts of sesbania powder, 8 parts of potassium carbonate, 2 parts of sodium metasilicate, dodecane
0.6 part of 1.4 parts of base sodium sulphate, 0.7 part of alumina fibre and luteium oxide.
A kind of preparation method of heat-insulation and heat-preservation ceramics of the present embodiment, comprises the following steps：
(1) each raw material is weighed by above-mentioned parts by weight；
(2) by expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene and magnesite at 900 DEG C together
After calcining 65 minutes, fineness is crushed to for 300-400nm, mixed powder A is obtained；
(3) by zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, potassium carbonate, sodium metasilicate, dodecyl
Sodium sulphate, alumina fibre and rare earth oxide are crushed to fineness for 320- in together being calcined after 50 minutes at 1230 DEG C
340nm, obtains mixed powder B；
(4) by above-mentioned mixed powder A, mixed powder B and sesbania powder and the mixed powder A, mixed powder B and sesbania powder
The water of gross weight 85% is mixed, and adjusts pH value for after 9.5, old 1.5 days of sealing and standing, old temperature is 33 DEG C, and humidity is
92%, obtain old pug；
(5) by above-mentioned old pug in base substrate is made under 3500kN pressure, by base substrate in dry 40 minutes at 230 DEG C
Afterwards, fired 75 minutes in the case where temperature is 1095 DEG C of reducing atmosphere, and be incubated 70 minutes, you can obtain the ceramics.
Ceramic performance analysis of the present invention：
In order to illustrate the heat preservation and insulation of ceramics of the invention, applicant has done comparative testing below：Experiment is divided into point
For the 1st group, the 2nd group, the 3rd group, control group 1, control group 2, totally 6 groups of control group 3, wherein, the 1st group using embodiment 1
Formula and preparation method make ceramics；2nd group makes ceramics using the formula and preparation method of embodiment 2；3rd group using implementation
The formula and preparation method of example 3 make ceramics；Control group 1 is made using the preparation method of embodiment 3, but without oxidation in formula
The material composition of zirconium and boron nitride；Control group 2 using embodiment 3 preparation method make, but formula in do not contain sodium metasilicate and
The material composition of lauryl sodium sulfate；Control group 3 is made using the preparation method of embodiment 3, but does not contain oxidation in formula
The material composition of aluminum fiber.Ceramics made from each group are subjected to the porosity, average pore size, thermal conductivity factor, compression strength after sintering
Etc. performance detection, detection is carried out under identical environmental condition, wherein, compression strength passes through the electronic anti-folding of KZY-300-1 types
Instrument is measured；The porosity uses Archimedes method, is measured by medium of kerosene；Average pore size is surveyed using nitrogen adsorption methods
Amount；Thermal conductivity factor is measured using laser flash method.Measurement result is as shown in table 1：
The ceramic properties testing result of table 1
By 1 group, the 2nd group, the 3rd group of data, the ceramic porosity of invention is 62.77-65.89%, average pore size
For 48-50 μm, thermal conductivity factor is 0.1-0.15W (mK), and compression strength is 170.76-173.18MPA；It is by the 3rd group and right
Contrast according to group 1 understands that raw material zirconium oxide of the present invention, boron nitride, the synergy of calcium oxide and magnesia enhance ceramic
Heat resistance and mechanical strength；By the contrast of the 3rd group and control group 2 understand carboxymethyl cellulose in raw material of the present invention, sesbania powder,
The cooperation of potassium carbonate, sodium metasilicate and lauryl sodium sulfate can increase the porosity；Pass through the 3rd group and the contrast of control group 3
The addition of alumina fibre reduce further thermal conductivity factor in raw material of the present invention, make heat insulating effect more notable.
Described above is the detailed description for the present invention preferably possible embodiments, but embodiment is not limited to this hair
The equal change or modification change completed under bright patent claim, the technical spirit suggested by all present invention, all should belong to
Cover the scope of the claims in the present invention.
Claims (6)
1. a kind of heat-insulation and heat-preservation ceramics, it is characterised in that：It is prepared from the following raw materials in parts by weight：50-60 parts of expanded perlite,
24-30 parts of mullite, 29-36 parts of clay, 18-23 parts of dolomite, 12-16 parts of potassium feldspar, 10-14 parts of spodumene, magnesite 6-9
Part, 1-3 parts of zirconium oxide, 3-7 parts of boron nitride, 10-15 parts of calcium oxide, 4-9 parts of magnesia, 2-4 parts of carboxymethyl cellulose, sesbania powder
18-26 parts, 5-9 parts of potassium carbonate, 1-5 parts of sodium metasilicate, 0.9-1.7 parts of lauryl sodium sulfate, 0.5-0.9 parts of alumina fibre and
0.4-0.8 parts of rare earth oxide.
2. a kind of heat-insulation and heat-preservation ceramics according to claim 1, it is characterised in that：By the raw material system of following parts by weight
Into：55 parts of expanded perlite, 28 parts of mullite, 34 parts of clay, 20 parts of dolomite, 14 parts of potassium feldspar, 13 parts of spodumene, magnesite
7 parts, 2 parts of zirconium oxide, 5 parts of boron nitride, 13 parts of calcium oxide, 6 parts of magnesia, 3 parts of carboxymethyl cellulose, 22 parts of sesbania powder, carbonic acid
0.6 part of 8 parts of potassium, 2 parts of sodium metasilicate, 1.4 parts of lauryl sodium sulfate, 0.7 part of alumina fibre and rare earth oxide.
3. a kind of heat-insulation and heat-preservation ceramics according to claim 1 or 2, it is characterised in that：The rare earth oxide is oxidation
One kind in cerium, lanthana or luteium oxide.
4. a kind of preparation method of heat-insulation and heat-preservation ceramics according to claim 1 or 2, it is characterised in that：Including following step
Suddenly：
(1) each raw material is weighed by above-mentioned parts by weight；
(2) by expanded perlite, mullite, clay, dolomite, potassium feldspar, spodumene and magnesite at 800-950 DEG C together
After calcining 60-70 minutes, fineness is crushed to for 300-400nm, mixed powder A is obtained；
(3) by zirconium oxide, boron nitride, calcium oxide, magnesia, carboxymethyl cellulose, potassium carbonate, sodium metasilicate, dodecyl sulphate
Sodium, alumina fibre and rare earth oxide are crushed to fineness for 320- in together being calcined after 40-60 minutes at 1200-1250 DEG C
340nm, obtains mixed powder B；
(4) by above-mentioned mixed powder A, mixed powder B and sesbania powder and the mixed powder A, mixed powder B and sesbania powder gross weight
The water for measuring 80-90% is mixed, and adjusts pH value for after 9-10, old 1-2 days of sealing and standing obtains old pug；
(5) by above-mentioned old pug in base substrate is made under 3000-4000kN pressure, by base substrate in dry 35- at 200-250 DEG C
After 45 minutes, fired 70-80 minutes in the case where temperature is 1090-1100 DEG C, and be incubated 60-75 minutes, you can obtain the ceramics.
5. a kind of preparation method of heat-insulation and heat-preservation ceramics according to claim 4, it is characterised in that：It is described in step (4)
Old temperature is 30-35 DEG C, and humidity is 90-95%.
6. a kind of preparation method of heat-insulation and heat-preservation ceramics according to claim 4, it is characterised in that：It is described in step (5)
Firing is to carry out under reducing atmosphere.
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| CN110683847A (en) * | 2019-10-25 | 2020-01-14 | 苏师大半导体材料与设备研究院(邳州)有限公司 | Preparation process of heat insulation ceramic |
| CN116239396A (en) * | 2023-05-10 | 2023-06-09 | 东台市圣德尔耐热材料有限公司 | Preparation process of light refractory brick for kiln |
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