CN105924203B - A kind of preparation method of light porous aluminum phosphate-calcium silicates Ceramic Balls - Google Patents
A kind of preparation method of light porous aluminum phosphate-calcium silicates Ceramic Balls Download PDFInfo
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
- C04B38/0035—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors by evaporation induced self-assembly
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
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- C04B35/447—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on phosphates, e.g. hydroxyapatite
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3436—Alkaline earth metal silicates, e.g. barium silicate
- C04B2235/3454—Calcium silicates, e.g. wollastonite
Abstract
A kind of preparation method of light porous phosphoric acid calcium aluminosilicate Ceramic Balls, it is characterised in that use following steps:(1)Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder carries out dry-mixed;(2)It is granulated, molding, cylindric green body is made;(3)After 70 DEG C of dry base substrates 5 hours, green body is put into the alumina crucible that interior bottom is semicircle spherical shape, 150 DEG C are heated to the speed of 5 DEG C/min and keep the temperature 2 hours under air atmosphere, 380 DEG C are heated to the speed of 10 20 DEG C/min and keep the temperature 1 hour again, then 680 DEG C are heated to the speed of 1 DEG C/min and keeps the temperature 2 hours, finally 1150 DEG C are heated to the speed of 5 DEG C/min and keep the temperature 2 hours, room temperature then is naturally cooled to, obtains light porous phosphoric acid calcium aluminosilicate Ceramic Balls.
Description
Technical field
The present invention is to provide a kind of preparation methods of light porous aluminum phosphate-calcium silicates Ceramic Balls, belong to special cermacis
Technical field of material.
Background technology
Porous alumionphosphate (AlPO4)-calcium silicates(CaSiO3) Ceramic Balls being widely used in the industrial production be general, it can be with
As catalyst carrier, chemical filler, heat preservation and refractory material etc..It is catalyzed as carrier of photocatalyst and other liquid phase reactors
Agent carrier, and as in water when the adsorbent of noxious material, in order to ensure with efficient catalytic effect and(Or)Absorption effect
Rate often requires that porous ceramic ball is in suspended state in water, this just needs to prepare a kind of light porous ceramic ball.Currently,
Ball is then mainly removed by firing using " core " of the sphere made of the organic matter lost as spherical green body is easily burnt both at home and abroad
Shape is organic " core ", to prepare a kind of suspensible porous ceramics hollow ball.The disadvantages of this method is:Molding is more difficult, and
During organic matter burns mistake, easily leads to ceramics cracking or destroy, reduce the yield rate of product;In addition, this technical process compared with
Complexity, cost is higher, deficiency in economic performance, environment easy to pollute.In order to overcome above-mentioned problem, invention provides one kind efficiently,
Simply, the preparation method of safe and reliable, easily operated, low-cost light porous aluminum phosphate-calcium silicates Ceramic Balls.
Invention content
The technology of the present invention provides a kind of efficient, simple, safe and reliable, easily operated, low-cost light porous phosphoric acid
The preparation method of aluminium-calcium silicates Ceramic Balls, technical solution are:
A kind of preparation method of light porous aluminum phosphate-calcium silicates Ceramic Balls, it is characterised in that use following steps:(1)
Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder is 2 according to mass ratio:1:3.11:0.03 ratio
Example carries out dry-mixed;Wherein, the silica containing 50 wt% lithias, the sodium oxide molybdena and 20 wt% of 30 wt% in frit;(2)Add
Add the poly-vinyl alcohol solution of a concentration of 8 wt% as binder, the additive amount of binder is the 5% of blank gross mass;Then it makes
Grain, molding, are made cylindric green body;(3)After 70 DEG C of dry base substrates 5 hours, it is that semicircle is spherical that green body, which is put into interior bottom,
In alumina crucible, 150 DEG C are heated to the speed of 5 DEG C/min under air atmosphere and keep the temperature 2 hours, then with 10-
The speed of 20 DEG C/min heats to 380 DEG C and keeps the temperature 1 hour, is then heated to the speed of 1 DEG C/min
680 DEG C and 2 hours are kept the temperature, finally heat to 1150 DEG C with the speed of 5 DEG C/min and keeps the temperature 2 hours, it is then natural
It is cooled to room temperature, obtains light porous aluminum phosphate-calcium silicates Ceramic Balls.
A kind of preparation method of the light porous aluminum phosphate-calcium silicates Ceramic Balls, it is characterised in that:Step(1)In
Calcium silicates powder and oxide powder average grain diameter all be 0.6 micron, aluminium dihydrogen phosphate powder average particle size be 0.5 micron,
The average grain diameter of frit powder is 0.7 micron.
A kind of preparation method of the light porous aluminum phosphate-calcium silicates Ceramic Balls, it is characterised in that:Step(2)In
Molding refer to powder carry out dry-pressing formed, briquetting pressure 10-25MPa.
Description of the drawings
Fig. 1 is the photo that light porous aluminum phosphate-calcium silicates Ceramic Balls prepared by the technology of the present invention float in water;From figure
In it can be seen that:Aluminum phosphate-calcium silicates Ceramic Balls float in water, illustrate that the bulk density of aluminum phosphate-calcium silicates Ceramic Balls is small
In the density of water, i.e., the material that prepared by the technology of the present invention belongs to light porous ceramic material.
The principle of this technology invention is as follows:
Using aluminium dihydrogen phosphate it is fusible at a lower temperature be liquid, then at relatively high temperatures again solidifiable property
It can so that green body is spontaneously formed in sintering process as sphere, and concrete principle is as follows:Aluminium dihydrogen phosphate be heated to 150 DEG C,
After heat preservation 2 hours, aluminium dihydrogen phosphate is changed into as liquid, is then heated rapidly to 380 DEG C and keeps the temperature 1 hour, the purpose is to make
Various raw materials form a kind of prodigious viscous body of viscosity at such a temperature.The effect that frit is added is on the one hand can to promote raw material
Melting be a kind of prodigious viscous body of viscosity, on the other hand can also increase surface tension so that viscous physical efficiency spontaneously form for
Sphere.It is heated slowly to during 680 DEG C, aluminium dihydrogen phosphate is gradually solidified as solid;In temperature-rise period, aluminium dihydrogen phosphate meeting
It is decomposed into aluminum phosphate, vapor and phosphorus pentoxide, the phosphorus pentoxide of generation can generate aluminum phosphate-silicic acid with magnesium carbonate reaction
Calcium, and vapor and carbon dioxide etc. have the function of pore-forming, can thus prepare light porous aluminum phosphate-calcium silicates ceramics.
Specific implementation mode
Embodiment 1
Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder is 2 according to mass ratio:1:3.11:
0.03 ratio carries out dry-mixed;Wherein, the titanium dioxide containing 50 wt% lithias, the sodium oxide molybdena and 20 wt% of 30 wt% in frit
Silicon;The average grain diameter for controlling calcium silicates powder and oxide powder is 0.6 micron, and aluminium dihydrogen phosphate powder average particle size is 0.5 micro-
The average grain diameter of rice, frit powder is 0.7 micron;The poly-vinyl alcohol solution of a concentration of 8 wt% is added as binder, binder
Additive amount be the 5% of blank gross mass;Then it is granulated, is dry-pressing formed with 10MPa pressure, cylindric green body is made;At 70 DEG C
After dry base substrate 5 hours, green body be put into interior bottom be semicircle spherical shape alumina crucible in, under air atmosphere with 5 DEG C/
The speed of min heats to 150 DEG C and keeps the temperature 2 hours, then heats to 380 DEG C with the speed of 10 DEG C/min and protect
Then warm 1 hour heats to 680 DEG C with the speed of 1 DEG C/min and keeps the temperature 2 hours, finally with the speed of 5 DEG C/min
Degree heats to 1150 DEG C and keeps the temperature 2 hours, then naturally cools to room temperature, obtains light porous aluminum phosphate-silicic acid
Calcium Ceramic Balls.The bulk density that porous ceramic ball is measured with Archimedes method is 0.93 g/cm3, open pore rate is 35 %.With
The crystalline phase that XRD analysis measures Ceramic Balls is aluminum phosphate and calcium silicates.
Embodiment 2
Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder are 2 according to mass ratio:1:3.11:
0.03 ratio carries out dry-mixed;Wherein, the titanium dioxide containing 50 wt% lithias, the sodium oxide molybdena and 20 wt% of 30 wt% in frit
Silicon;The average grain diameter for controlling calcium silicates powder and oxide powder is 0.6 micron, and aluminium dihydrogen phosphate powder average particle size is 0.5 micro-
The average grain diameter of rice, frit powder is 0.7 micron;The poly-vinyl alcohol solution of a concentration of 8 wt% is added as binder, binder
Additive amount be the 5% of blank gross mass;Then it is granulated, is dry-pressing formed with 20MPa pressure, cylindric green body is made;At 70 DEG C
After dry base substrate 5 hours, green body be put into interior bottom be semicircle spherical shape alumina crucible in, under air atmosphere with 5 DEG C/
The speed of min heats to 150 DEG C and keeps the temperature 2 hours, then heats to 380 DEG C with the speed of 15 DEG C/min and protect
Then warm 1 hour heats to 680 DEG C with the speed of 1 DEG C/min and keeps the temperature 2 hours, finally with the speed of 5 DEG C/min
Degree heats to 1150 DEG C and keeps the temperature 2 hours, then naturally cools to room temperature, obtains light porous aluminum phosphate-silicic acid
Calcium Ceramic Balls.The bulk density that porous ceramic ball is measured with Archimedes method is 0.91 g/cm3, open pore rate is 34 %.With
The crystalline phase that XRD analysis measures Ceramic Balls is aluminum phosphate and calcium silicates.
Embodiment 3
Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder are 2 according to mass ratio:1:3.11:
0.03 ratio carries out dry-mixed;Wherein, the titanium dioxide containing 50 wt% lithias, the sodium oxide molybdena and 20 wt% of 30 wt% in frit
Silicon;The average grain diameter for controlling calcium silicates powder and oxide powder is all 0.6 micron, and aluminium dihydrogen phosphate powder average particle size is 0.5
The average grain diameter of micron, frit powder is 0.7 micron;The poly-vinyl alcohol solution of a concentration of 8 wt% is added as binder, is bonded
The additive amount of agent is the 5% of blank gross mass;Then it is granulated, is dry-pressing formed with 25 MPa pressure, cylindric green body is made;70
DEG C dry base substrate is put into green body in the alumina crucible that interior bottom is semicircle spherical shape, after 5 hours with 5 under air atmosphere
DEG C/speed of min heats to 150 DEG C and keeps the temperature 2 hours, then heat to 380 DEG C simultaneously with the speed of 20 DEG C/min
1 hour is kept the temperature, then heat to 680 DEG C with the speed of 1 DEG C/min and keeps the temperature 2 hours, finally with 5 DEG C/min's
Speed heats to 1150 DEG C and keeps the temperature 2 hours, then naturally cools to room temperature, obtains light porous aluminum phosphate-silicon
Sour calcium Ceramic Balls.The bulk density that porous ceramic ball is measured with Archimedes method is 0.95g/cm3, open pore rate is 35 %.With
The crystalline phase that XRD analysis measures Ceramic Balls is aluminum phosphate and calcium silicates.
Claims (2)
1. a kind of preparation method of light porous aluminum phosphate-calcium silicates Ceramic Balls, it is characterised in that use following steps:(1)
Calcium silicates powder, alumina powder, biphosphate aluminium powder, frit powder are 2 according to mass ratio:1:3.11:0.03 ratio
It carries out dry-mixed;Wherein, the silica containing 50 wt% lithias, the sodium oxide molybdena and 20 wt% of 30 wt% in frit;Control silicon
The average grain diameter of sour calcium powder and alumina powder is all 0.6 micron, and aluminium dihydrogen phosphate powder average particle size is 0.5 micron, is melted
The average grain diameter of block powder is 0.7 micron;(2)The poly-vinyl alcohol solution of a concentration of 8 wt% is added as binder, binder
Additive amount is the 5% of blank gross mass;Then it is granulated, is molded, cylindric green body is made;(3)In 70 DEG C of dry base substrates 5 hours
Afterwards, green body is put into the alumina crucible that interior bottom is semicircle spherical shape, is heated with the speed of 5 DEG C/min under air atmosphere
It is warming up to 150 DEG C and keeps the temperature 2 hours, then heat to 380 DEG C with the speed of 10-20 DEG C/min and keep the temperature 1 hour,
Then 680 DEG C are heated to the speed of 1 DEG C/min and keeps the temperature 2 hours, finally with the speed heat temperature raising of 5 DEG C/min
To 1150 DEG C and 2 hours are kept the temperature, room temperature is then naturally cooled to, obtains light porous aluminum phosphate-calcium silicates Ceramic Balls.
2. a kind of preparation method of light porous aluminum phosphate-calcium silicates Ceramic Balls as described in claim 1, it is characterised in that:
Step(2)In molding refer to powder carry out dry-pressing formed, briquetting pressure 10-25MPa.
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Citations (4)
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CN1091764A (en) * | 1993-02-19 | 1994-09-07 | 胡小弟 | The high temperature compound binding agent |
CN102503510A (en) * | 2011-11-03 | 2012-06-20 | 杭州中亚新材料科技有限公司 | Production process for firing alumina foamed ceramic filter board in roller kiln |
CN103396150A (en) * | 2013-07-30 | 2013-11-20 | 河南煤业化工集团研究院有限责任公司 | Method for preparing foam ceramic self-insulation wall material by utilizing solid wastes |
CN105481464A (en) * | 2014-09-19 | 2016-04-13 | 青岛百键城环保科技有限公司 | Porous refractory material and preparation method thereof |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1091764A (en) * | 1993-02-19 | 1994-09-07 | 胡小弟 | The high temperature compound binding agent |
CN102503510A (en) * | 2011-11-03 | 2012-06-20 | 杭州中亚新材料科技有限公司 | Production process for firing alumina foamed ceramic filter board in roller kiln |
CN103396150A (en) * | 2013-07-30 | 2013-11-20 | 河南煤业化工集团研究院有限责任公司 | Method for preparing foam ceramic self-insulation wall material by utilizing solid wastes |
CN105481464A (en) * | 2014-09-19 | 2016-04-13 | 青岛百键城环保科技有限公司 | Porous refractory material and preparation method thereof |
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