CN104445958B - Fluorcanasite microcrystalline reinforced foam glass and preparation method thereof - Google Patents
Fluorcanasite microcrystalline reinforced foam glass and preparation method thereof Download PDFInfo
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- CN104445958B CN104445958B CN201410659183.8A CN201410659183A CN104445958B CN 104445958 B CN104445958 B CN 104445958B CN 201410659183 A CN201410659183 A CN 201410659183A CN 104445958 B CN104445958 B CN 104445958B
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Abstract
The invention relates to the field of foam glass and particularly relates to fluorcanasited microcrystalline reinforced foam glass and a preparation method thereof. The preparation method of the fluorcanasite microcrystalline reinforced foam glass comprises the following steps: uniformly mixing base glass, a foaming agent and a modifier as raw materials at mass percentage of 100:(0.5-6):(0.5-4) to obtain a mixture and placing the mixture into a heat-resistant mold; placing the heat-resistant mold into a foaming kiln and heating the heat-resistant mold to 680-750 DEG C at a heating speed of 3-10 DEG C/min and carrying out heat preservation for 30-60 minutes; heating the heat-resistant mold to 850-900 DEG C at a heating speed of 10-15 DEG C/min and carrying out heat preservation for 10-30 minutes; and cooling to room temperature at a cooling speed of 0.2-2 DEG C/min. The main crystalline phase of the fluorcanasite microcrystalline reinforced foam glass is canasite or a derivative crystalline phase of canasite. The compressive strength and flexural strength of the fluorcanasite microcrystalline reinforced foam glass are significantly reinforced.
Description
Technical field
The present invention relates to foam glass, especially a kind of fluorcanasite crystallite enhancing foam glass and preparation method thereof.
Background technology
Foam glass has the performances such as superior insulation, sound absorption, fire prevention, waterproof and dampproof, acid and alkali-resistance, can make chemical industry,
Building heat preservation, heat-insulated and ornament materials.Raising fire resistance rating being required with insulation material for building, foam glass is increasingly
It is taken seriously.Traditional foam glass is to utilize cullet, typically soda-lime-silica glass, by soda-lime-silica glass and foaming agent, steady
After the ball milling mixings such as infusion are uniform, lightweight that foamed annealing obtains, low thermal conductivity material.Find in practical application, foam glass
The mechanical strength of glass is relatively low, greatly limit the range of foam glass, and therefore, the mechanical performance improving foam glass becomes
The striving direction of numerous research worker.By in foam glass batch add additive so as to foaming after in foam glass
Middle separate out some crystal method, can by a relatively large margin raising foam glass mechanical strength.But, existing crystallite
In the fabrication process, foaming is in bad order for foam glass.
Content of the invention
In view of this, the present invention provides a kind of fluorcanasite crystallite to strengthen foam glass and preparation method thereof, main mesh
Be, manufacture a kind of good crystallite foam glass of foaming.
In order to achieve the above object, present invention generally provides following technical scheme:
On the one hand, embodiments of the invention provide a kind of fluorcanasite crystallite to strengthen the preparation method of foam glass.
The preparation method that described fluorcanasite crystallite strengthens foam glass comprises the following steps:
Blending process: by mass percent be the parent glass of 100:0.5～6:0.5～4, foaming agent and regulator mixing
Put in heat-resisting die after uniformly；
Temperature reaction process: heat-resisting die is put in foaming kiln, is warming up to the heating rate of 3～10 DEG C/min
680～750 DEG C, it is incubated 30～60min；Be warming up to 850～900 DEG C with the heating rate of 10～15 DEG C/min again, insulation 10～
30min；
Hypothermic response process: room temperature is cooled to the rate of temperature fall of 0.2～2 DEG C/min；
Demoulding cutting process: the product of above-mentioned hypothermic response process is carried out after demoulding lattice, shape, size are cut on demand
Cut,
Wherein: described parent glass is r2o-cao-sio2- f system glass；Or
Described parent glass is r2o-cao-sio2- f system glass and the mixture of common soda-lime-silica glass.
Aforesaid fluorcanasite crystallite strengthens the preparation method of foam glass, described r2o-cao-sio2- f system glass,
It is cullet or the cullet that can separate out fluorcanasite by dominated crystallization.
Aforesaid fluorcanasite crystallite strengthens the preparation method of foam glass, described r2o-cao-sio2- f system glass
It is using the glass that can separate out fluorcanasite carrying out water quenching preparation after chemical industry or raw mineral materials melting.
Aforesaid fluorcanasite crystallite strengthens the preparation method of foam glass, described r2o-cao-sio2-f system glass
Glass, including following material composition and mass percent sio2: 55～62%, cao:15～18%, k2O:8～10%, na2O:4～
7%, f:2～4%, al2O3:1～2%, mgo:0～1%, zno:0～2%, tio2:0～1.5%, other 0.5～1%.
Aforesaid fluorcanasite crystallite strengthens the preparation method of foam glass, described foaming agent is carbon dust, Calcium Carbonate,
One or more of Natrii Sulfas, carborundum,
Aforesaid fluorcanasite crystallite strengthens the preparation method of foam glass, and described regulator is sodium phosphate, phosphoric acid
One or more of magnesium, Borax, boric acid.
On the other hand, the purpose of the present invention can also strengthen foam glass by a kind of fluorcanasite crystallite and realize.
It is to strengthen foam glass by above-mentioned fluorcanasite crystallite that described fluorcanasite crystallite strengthens foam glass
Prepared by preparation method, the principal crystalline phase that described fluorcanasite crystallite strengthens foam glass is canasite or canasite spreads out
Raw crystalline phase, paracrystalline phase includes caf2.
Aforesaid fluorcanasite crystallite strengthens foam glass, and described fluorcanasite crystallite strengthens the para-crystal of foam glass
Mutually also include: sio2, nepheline and/or amphibole.
Aforesaid fluorcanasite crystallite strengthens foam glass, and described fluorcanasite principal crystalline phase is lath-shaped silicon alkali calcium
Stone, microstructure is in needle-like cross structure.
Aforesaid fluorcanasite crystallite strengthens foam glass, and described fluorcanasite crystallite strengthens the average hole of foam glass
Footpath is 0.2～3mm, and bulk density is 150～600kg/m3.
Aforesaid fluorcanasite crystallite strengthens foam glass, and the heat conductivity at 25 DEG C is 0.05～0.15w/mk.
Aforesaid fluorcanasite crystallite strengthens foam glass, and comprcssive strength is 2.0～30mpa, and rupture strength 1.5～
15mpa.
By technique scheme, a kind of fluorcanasite crystallite proposed by the present invention strengthens foam glass and its preparation side
Method at least has the advantage that
1) fluorcanasite crystallite proposed by the present invention strengthens foam glass, under same volume density conditions, and existing
Foam glass compare, heat conductivity is constant, and comprcssive strength and rupture strength are remarkably reinforced.
2) bubble ratio that fluorcanasite crystallite proposed by the present invention strengthens in foam glass is more uniform.
3) fluorcanasite crystallite proposed by the present invention strengthens the preparation method of foam glass it is achieved that crystallize and foaming work
The matched well of skill.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description
Fig. 1 is the stream of the preparation method that a kind of fluorcanasite crystallite that embodiments of the invention provide strengthens foam glass
Cheng Tu；
Fig. 2 is the scanning electron microscopic picture that a kind of fluorcanasite crystallite that embodiments of the invention provide strengthens foam glass
One；
Fig. 3 is the scanning electron microscopic picture that a kind of fluorcanasite crystallite that embodiments of the invention provide strengthens foam glass
Two；
Fig. 4 is that a kind of fluorcanasite crystallite after 750 DEG C of foaming heat treatments that embodiments of the invention provide strengthens
The xrd figure of foam glass；
Fig. 5 is that a kind of fluorcanasite crystallite after 850 DEG C of foaming heat treatments that embodiments of the invention provide strengthens
The xrd figure of foam glass.
Specific embodiment
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, strengthen foam glass and preparation method thereof to according to a kind of fluorcanasite crystallite proposed by the present invention
Specific embodiment, structure, feature and its effect, describe in detail as after.In the following description, different " embodiment " or
What " embodiment " referred to is not necessarily same embodiment.Additionally, special characteristic in one or more embodiments, structure or feature can
Combined by any suitable form.
The invention discloses a kind of fluorcanasite crystallite strengthens the preparation method of foam glass, concrete technology flow process referring to
Fig. 1, the preparation method that described fluorcanasite crystallite strengthens foam glass comprises the following steps: blending process: by percent mass
Put in heat-resisting die than for the parent glass of 100:0.5～6:0.5～4, foaming agent and regulator；Temperature reaction process: will
Heat-resisting die is put in foaming kiln, is warming up to 680～750 DEG C with the heating rate of 3～10 DEG C/min, is incubated 30～60min；
It is warming up to 850～900 DEG C with the heating rate of 10～15 DEG C/min again, be incubated 10～30min；Hypothermic response process: with 0.2～
The rate of temperature fall of 2 DEG C/min is cooled to room temperature；Demoulding cutting process: the product of above-mentioned hypothermic response process is carried out demoulding lattice
Afterwards, shape, size cutting on demand.Wherein: described parent glass is r2o-cao-sio2- f system glass, or described parent glass
For r2o-cao-sio2- f system glass and the mixture of soda-lime-silica glass.
Described blending process, after above-mentioned raw materials are weighed by proportioning, puts into ball mill ball milling, after being milled to powdery, makes
Parent glass batch.
Selectively, described blending process or the independent ball milling of different glass component, foaming agent obtain micropowder, so
After remix uniformly as foamed glass foaming raw material.
In the present invention, described r2o-cao-sio2R in-f system glass can be the alkali metals such as na and k.
Described r2o-cao-sio2- f system glass, in 700～850 DEG C of isothermal holding, can be lured by early stage caf2 forming core core
Send out the coring growth of canasite crystal, and ultimately form the microstructure that the needle-like of densification is interlocked.And cold stage 700～
800 DEG C of split-phases, forming core initial stages are less to the viscosity influence of parent glass, are conducive to obtaining preferable foaming structure.Described r2o-
cao-sio2The organizational structure that in-f system glass, a large amount of aeolotropic crystals and needle-like are interlocked is so that product has the intensity of superelevation
And toughness, fracture toughness up to 4.8～5.2mpa.m1/2.
In (700～800 DEG C) glass under low temperature first precipitation be caf2Nucleus, then at high temperature (800～900 DEG C) place
Canasite crystal fast growth during reason.
And, described r2o-cao-sio2- f system glass is easier preparation or easy acquisition.
Preferably, another embodiment of the present invention proposes the preparation side that a kind of fluorcanasite crystallite strengthens foam glass
Method, compared with above-described embodiment, described r2o-cao-sio2- f system glass, can be to meet composition range requirement, can pass through to be subject to
Control crystallization separates out the cullet of fluorcanasite, cullet.
Preferably, another embodiment of the present invention proposes the preparation side that a kind of fluorcanasite crystallite strengthens foam glass
Method, compared with above-described embodiment, using the special glass material of chemical industry, the preparation of raw mineral materials melt water quenching.
Specifically, described melt water quenching prepares r2o-cao-sio2- f system glass, process is: using quartz sand, aluminium oxide,
Soda, potassium carbonate, calcium fluoride, prodan, magnesium oxide etc., or corresponding raw mineral materials is such as: Anhydrite, fluorite, calcite, fluorine
Sodium silicate, dolomite obtain the glass batch of tie element, and in glass melter, 1480～1550 DEG C melt 2～6 hours, obtain
After obtaining the glass melt uniformly clarified, then shape broken or water quenching acquisition glass pellets, treat that ball milling is used.
Preferably, another embodiment of the present invention proposes the preparation side that a kind of fluorcanasite crystallite strengthens foam glass
Method, compared with above-described embodiment, described r2o-cao-sio2- f system glass, becomes and mass percent including following material
sio2: 55～62%, cao:15～18%, k2O:8～10%, na2O:4～7%, f:2～4%, al2o3: 1～2%, mgo:0
～1%, zno:0～2%, tio2:0～1.5%, other 0.5～1%.
Preferably, another embodiment of the present invention proposes the preparation side that a kind of fluorcanasite crystallite strengthens foam glass
Method, compared with above-described embodiment, described foaming agent is one or more of carbon dust, Calcium Carbonate, Natrii Sulfas, carborundum,
Preferably, another embodiment of the present invention proposes the preparation side that a kind of fluorcanasite crystallite strengthens foam glass
Method, compared with above-described embodiment, described regulator is one or more of sodium phosphate, magnesium phosphate, Borax, boric acid.
Generally, same foaming agent consumption is more, and the porosity of foam glass is higher, and bubble is bigger, that is, steeps
Foam glass density is less, and corresponding intensity is also lower, but the quantity of pore and the foaming of shape marine site in foam glass in practice
The species of agent, the property of parent glass, foam process have much relations, and the harmonious relations between only several persons have been got well and just can have been obtained
Best result.
In blending process, select 0.5% amount taking carborundum as a example, the density of the foam glass prepared is 0.9～
1.2g/cm3；Select 3% amount in blending process, the density of the foam glass prepared is 0.5～0.6g/cm3, it is not
Linear proportionate relationship.
When being embodied as, during preparing fluorcanasite crystallite enhancing foam glass, two kinds typically can be selected to send out
Infusion, such as carbon dust and carbonic acid silicon.The decomposition temperature of carbon dust is 700 DEG C, and the blowing temperature of carborundum can reach 1000 DEG C.This
Bright use both foaming agent it can be ensured that all substantial amounts of bubble can be produced in large temperature range, that is, in described fluorine
Bubble all can be produced in canasite crystallite enhancing foam glass preparation process.
The invention discloses a kind of fluorcanasite crystallite strengthens foam glass, as shown in Figure 4 and Figure 5, described fluorine silicon alkali
The xrd principal crystalline phase that calcium stone crystallite strengthens foam glass is canasite or canasite derives crystalline phase, and paracrystalline phase includes caf2.
More due to strengthening addition element in the preparation process of foam glass in fluorcanasite crystallite, composition and standard
Canasite crystalline component has deviation, thus the crystal phase structure of canasite can be led to change.Described canasite spreads out
Raw crystalline phase is also likely to be the distressed structure of canasite.
Described canasite derives crystalline phase and includes na4-3k2-3ca5(si12o30)f4Or k2(na3ca5)si12o30f4h2o.
Preferably, another embodiment of the present invention proposes a kind of fluorcanasite crystallite strengthens foam glass, with above-mentioned reality
Apply example to compare, the paracrystalline phase that described fluorcanasite crystallite strengthens foam glass also includes sio2, one of nepheline and amphibole
Or it is several.
Preferably, another embodiment of the present invention proposes a kind of fluorcanasite crystallite strengthens foam glass, with above-mentioned reality
Apply example to compare, described canasite principal crystalline phase is lath-shaped canasite, microstructure is in needle-like cross structure.
Preferably, another embodiment of the present invention proposes a kind of fluorcanasite crystallite strengthens foam glass, with above-mentioned reality
To apply example to compare, it is 0.2～3mm that described fluorcanasite crystallite strengthens foam glass average pore size, bulk density is 150～
600kg/m3.
Preferably, another embodiment of the present invention proposes a kind of fluorcanasite crystallite strengthens foam glass, with above-mentioned reality
Apply example to compare, the heat conductivity at 25 DEG C is 0.05～0.15w/mk.
Preferably, another embodiment of the present invention proposes a kind of fluorcanasite crystallite strengthens foam glass, with above-mentioned reality
Apply example to compare, comprcssive strength is 2.0～30mpa, rupture strength 1.5～15mpa.
The bulk density of existing foam glass is in 160kg/m3Left and right, heat conductivity is in below 0.058w/m*k, resistance to compression
Intensity >=0.7mpa, rupture strength >=0.5mpa.
Fluorcanasite crystallite disclosed in this invention strengthens foam glass, compared with existing foam glass, identical
Under the conditions of bulk density, heat conductivity is substantially identical, but, comprcssive strength and rupture strength are remarkably reinforced.And,
The bubble ratio that described fluorcanasite crystallite strengthens in foam glass is more uniform.
Using r2o-cao-sio2- f system glass is the specific embodiment of foam glass raw material:
The present embodiment, by the use of chemical industry or raw mineral materials as raw material, prepares synthesis parent glass first.Wherein, according to chemical industry
Or the difference of raw mineral materials, its usage amount is also different.Specifically, chemical industry or mineral proportioning: sio are calculated by following compositions2:
60.5%, cao:17.5%, k2O:8.5%, na2O:6.5%, f:3.3%, al2o3: 2%, zno:1.0%, mgo:0.3%,
Other 0.4%.
In the present embodiment, using following chemical industry or raw mineral materials, concrete proportioning is: 60 parts of quartz sand, and 25 parts of calcite is pure
11 parts of alkali, 13 parts of potassium carbonate, 7 parts of fluorite, 1.5 parts of aluminium oxide, 1.0 parts of zinc oxide, 0.5 part of magnesium oxide.By above-mentioned raw materials by joining
Stir than being added to batch mixer after weighing, make parent glass batch.
Parent glass batch is delivered glass melter melt 2～4 hours in the range of 1480～1500 DEG C, Ran Houjing
The positions such as kiln dog-hole, work pool, in 1300～1350 DEG C of scope inside holding homogenizing, clarification in 1～2 hour, obtain desired height
Warm glass melt.
Above-mentioned glass melt passes through calendering or pours into parent glass plate, block, after cooling broken obtain glass fragment,
Grain；Or will be dried after above-mentioned glass melt direct-water-quenching, obtain parent glass pellet.
According to the proportioning raw materials of foam glass, accurately weigh 100 parts of parent glass granules, 1 part of carborundum, 0.5 powder carbon dust,
1 part of sodium phosphate, 1 part of Borax；Then by raw material mixing and ball milling to 200 mesh, sieve, form foam glass raw material.
The above-mentioned foam glass blank mixing is sent in foaming kiln together with mould, with the heating rate of 5 DEG C/min
It is warming up to 700 DEG C；It is warming up to 760 DEG C with 1 DEG C/min again；R during this again2o-cao-sio2- f system glass forms substantial amounts of forming core
Core, but the required viscosity temperature characteristic of later stage foaming can't be affected, it is, the liquation of described foam glass blank
Viscosity is constant, and when being warming up to 860 DEG C and being incubated 30min with the heating rate of 10 DEG C/min again, vitreous body can be formed in a large number
The uniformly pore of closing, and canasite crystal also can be big in the enterprising step-length of key foundation；Again with the cooling of 15 DEG C/min
Speed is lowered the temperature 600 DEG C, is then cooled to room temperature with the rate of temperature fall of 0.5 DEG C/min.In glass under low temperature first precipitation be
caf2Nucleus, the then canasite crystal fast growth in high-temperature process.
After the foam glass demoulding obtained above, it is transferred to cutting place and carries out cutting, pack, become foam glass and produce
Product.
Obtaining its principal crystalline phase of foam glass is canasite (canasite-a), and its paracrystalline phase is caf2, its principal crystalline phase
For lath-shaped canasite, microstructure is in needle-like cross structure, sees accompanying drawing 2.
Described fluorcanasite crystallite strengthens foam glass, and according to different ratio and foam process, its average pore size is
0.8mm, its bulk density is 350kg/m3, heat conductivity is 0.11w/mk (25 DEG C), and comprcssive strength is 5.4mpa.
With r2o-cao-sio2- f system glass and soda-lime-silica glass are mixed into the specific embodiment of foam glass raw material:
The present embodiment utilizes r2o-cao-sio2- f system glass and soda-lime-silica glass, as raw material, prepare synthesis basis first
Glass.Specifically, calculate r by following compositions2o-cao-sio2- f system glass and the proportioning of soda-lime-silica glass: sio2: 58.5%,
Cao:17%, k2O:7.7%, na2O:6.8%, f:3.8%, al2o3: 2.0%, zno:2.0%, mgo:0.5%, tio2:
1.0%, other 0.7%.
According to the proportioning raw materials of foam glass, accurately weigh 100 parts of parent glass granules, 1 part of carborundum, 1.5 powder carbon dusts,
1 part of sodium phosphate, 1 part of Borax；Wherein 100 parts parent glass include 20 parts of r2o-cao-sio2- f system glass and 80 parts of sodium calcium silicon glass
Glass, soda-lime-silica glass discards the particulate material of plate glass；Then by above-mentioned raw materials mixing and ball milling to 200 mesh, sieve, form foam
Frit.
The above-mentioned foam glass raw material mixing is loaded in heat-resisting die, blank is sent in foaming kiln together with mould,
It is warming up to 650 DEG C with the heating rate of 5 DEG C/min；It is warming up to 750 DEG C with 1 DEG C/min again；Again with the heating rate of 10 DEG C/min
It is warming up to 900 DEG C and be incubated 20min；Lowered the temperature 600 DEG C with the rate of temperature fall of 15 DEG C/min again, then with the cooling of 0.5 DEG C/min
Speed is cooled to room temperature.
After the foam glass demoulding obtained above, it is transferred to cutting place and carries out cutting, pack, become foam glass and produce
Product.
Obtaining its crystalline phase of foam glass is canasite, and its paracrystalline phase is caf2, canasite is in residual glass phase
In needle-like divergent structure, see accompanying drawing 3.
Described fluorcanasite crystallite strengthens foam glass, and according to different ratio and foam process, its average pore size is
1.4mm, its bulk density is 160kg/m3, heat conductivity is 0.06w/mk (25 DEG C), and comprcssive strength is 1.4mpa.
The present invention, by the abundant analysis to glass material characteristic and foam process, selects close with soda-lime-silica glass composition
R2o-cao-sio2- f system glass as addO-on therapy or foamed glass component, avoid foam pyroceram preparation in crystallize with
Contradiction between foaming.On the basis of keeping the uniform sealed porosity of foaming process to be formed, lath-shaped is obtained by quick crystallize
Canasite crystalline phase and needle-like interlock organizational structure, and then change foam glass structure cleavage mechanism, significantly improve this
The intensity of foam glass and toughness.The crystallite obtaining a kind of excellent combination property strengthens foam glass.
The above, be only presently preferred embodiments of the present invention, and not the present invention is made with any pro forma restriction, according to
Any simple modification, equivalent variations and modification above example made according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (8)
1. a kind of fluorcanasite crystallite strengthens the preparation method of foam glass it is characterised in that comprising the following steps:
Blending process: by mass percent be the parent glass of 100:0.5～6:0.5～4, foaming agent and regulator mix homogeneously
After put in heat-resisting die；
Temperature reaction process: heat-resisting die is put in foaming kiln, it is warming up to 680 with the heating rate of 3～10 DEG C/min～
750 DEG C, it is incubated 30～60min；It is warming up to 850～900 DEG C with the heating rate of 10～15 DEG C/min again, be incubated 10～30min；
Hypothermic response process: room temperature is cooled to the rate of temperature fall of 0.2～2 DEG C/min；
Demoulding cutting process: the product of above-mentioned hypothermic response process is carried out after the demoulding, on demand shape, size cutting,
Wherein: described parent glass is r2o-cao-sio2- f system glass or r2o-cao-sio2- f system glass and common sodium calcium silicon glass
The mixture of glass, described r2o-cao-sio2- f system glass, including following material composition and mass percent sio2: 55～
62%, cao:15～18%, k2O:8～10%, na2O:4～7%, f:2～4%, al2o3: 1～2%, mgo:0～1%,
Zno:0～2%, tio2: 0～1.5%, other 0.5～1%.
2. fluorcanasite crystallite according to claim 1 strengthen foam glass preparation method it is characterised in that
Described r2o-cao-sio2- f system glass, is cullet or the cullet that can separate out fluorcanasite by dominated crystallization；
Or
Using the glass that can separate out fluorcanasite carrying out water quenching preparation after chemical industry or raw mineral materials melting.
3. fluorcanasite crystallite according to claim 1 strengthen foam glass preparation method it is characterised in that
Described foaming agent is one or more of carbon dust, Calcium Carbonate, Natrii Sulfas, carborundum,
Described regulator is one or more of sodium phosphate, magnesium phosphate, Borax, boric acid.
4. a kind of fluorcanasite crystallite strengthens foam glass it is characterised in that described fluorcanasite crystallite strengthens foam glass
Glass is that the fluorcanasite crystallite any one of claims 1 to 3 strengthens prepared by the preparation method of foam glass,
The principal crystalline phase that described fluorcanasite crystallite strengthens foam glass is canasite or canasite derives crystalline phase, and paracrystalline phase includes
caf2, described canasite principal crystalline phase is lath-shaped canasite, and microstructure is in needle-like cross structure.
5. fluorcanasite crystallite according to claim 4 strengthen foam glass it is characterised in that
The paracrystalline phase that described fluorcanasite crystallite strengthens foam glass also includes: sio2, nepheline and/or amphibole.
6. fluorcanasite crystallite according to claim 4 strengthen foam glass it is characterised in that
It is 0.2～3mm that described fluorcanasite crystallite strengthens foam glass average pore size, and bulk density is 150～600kg/m3.
7. fluorcanasite crystallite according to claim 4 strengthen foam glass it is characterised in that
Heat conductivity at 25 DEG C is 0.05～0.15w/mk.
8. fluorcanasite crystallite according to claim 4 strengthen foam glass it is characterised in that
Comprcssive strength is 2.0～30mpa, rupture strength 1.5～15mpa.
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| CN108821599A (en) * | 2018-09-06 | 2018-11-16 | 四川名微晶科技股份有限公司 | A method of devitrified glass is prepared using nepheline tailing as primary raw material |
| CN112759266A (en) * | 2021-01-04 | 2021-05-07 | 安徽火凤凰新材料科技有限公司 | Low-melting-point white microcrystalline glass plate and preparation method and application thereof |
| CN114790084B (en) * | 2022-04-20 | 2023-11-28 | 河南省高新技术实业有限公司 | Porous microcrystalline glass and preparation method thereof |
| CN115028364B (en) * | 2022-06-07 | 2024-01-16 | 山东国瓷功能材料股份有限公司 | Glass ceramic, preparation method thereof and dental restoration material |
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