CN109879666A - The method for obtaining hollow yttrium-aluminium-garnet heat insulation fiber using bombax cotton - Google Patents
The method for obtaining hollow yttrium-aluminium-garnet heat insulation fiber using bombax cotton Download PDFInfo
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- CN109879666A CN109879666A CN201910308738.7A CN201910308738A CN109879666A CN 109879666 A CN109879666 A CN 109879666A CN 201910308738 A CN201910308738 A CN 201910308738A CN 109879666 A CN109879666 A CN 109879666A
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- yttrium
- aluminium
- garnet
- salt
- bombax cotton
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Abstract
The invention discloses a kind of methods for obtaining hollow yttrium aluminium garnet fibers using bombax cotton, belong to heat-barrier material field.It the steps include: that aluminium salt and yttrium salt are dissolved in 50vol% ethyl alcohol according to a certain percentage is configured to solution, the bombax cotton for having hollow structure is immersed in solution after impregnating, extracting, be dried in vacuo, it is sintered under aerobic atmosphere, to obtain the yttrium aluminium garnet fibers of hollow structure.The present invention is simple, stable, practical, and the fibre diameter prepared is 10 QUOTE Left and right, and density is low, degree of hollowness is high, thermal coefficient is low, more solid YAG fiber, the hollow fibre thermal conductivity of this method preparation reduces hot 500 °C of the face 51%().
Description
Technical field
The invention belongs to fire resisting material fields, and in particular to a kind of to obtain hollow yttrium-aluminium-garnet using bombax cotton
(YAG) method of heat insulation fiber.
Background technique
Yttrium-aluminium-garnet (YAG) is the composite oxides of aluminium oxide and yttrium oxide, belongs to cubic system, has garnet
Structure.Lattice constant is 1.2002nm, and fusing point is 1970 °C, density 4.55g/cm3, chemical property is stablized, insoluble in sulfuric acid, salt
Acid, nitric acid and hydrofluoric acid.YAG has high intensity, high-modulus, high temperature resistant, anti-oxidant, resistant to chemical etching and excellent optical
Matter and mechanical behavior under high temperature (high-temerature creep is small) are a kind of very important inorganic non-metallic materials.YAG is also domestic and international one kind
Novel lightweight refracrory, can the normal use under 1500 °C~1600 °C high temperature for a long time.In addition, YAG high temperature creep resistance
Can be excellent, it is best in current all oxides.(Li Chengshun, Zhang Yujun, Zhang Jingde wait yttrium aluminium garnet fibers
Preparation and application study progress [J] silicate notification, 2009,28 (1): 132~137.) excellent Properties of High Temperature Creep
Original appearance is kept when high temperature, permanent load use for a long time conducive to refractory material, this performance pole to structure function material
For key.
The YAG fiber prepared at present is solid fibre, and thermal coefficient is 0.148 W/ (mK), heat-insulated performance at 500 °C
It is general and it is difficult have big promotion, which has limited its application ranges in heat-insulated field.
Summary of the invention
The object of the present invention is to provide a kind of sides that hollow yttrium-aluminium-garnet (YAG) heat insulation fiber is obtained using bombax cotton
Method.
The purpose of the present invention is achieved through the following technical solutions:
A method of hollow yttrium-aluminium-garnet (YAG) heat insulation fiber being obtained using bombax cotton, the method steps are as follows:
Step 1, the ethanol solution of configuration aluminium salt, yttrium salt；
Step 2 immerses bombax cotton in above-mentioned solution, impregnates 1~10 minute, takes out, extracts and dry；
Step 3, by the resulting bombax cotton of step 2 under aerobic atmosphere, after keeping the temperature 1~5h under 1500 °C~1600 °C,
Yttrium-aluminium-garnet (YAG) heat insulation fiber of the hollow structure is made in furnace cooling.
Further, in step 1, the concentration of ethanol solution is 50vol%.
Further, in step 1, the quality ratio of aluminium salt and ethanol solution is 5~30:100, and quality is than preferably 10~20:
100；Guarantee the Y in yttrium salt3+With the Al in aluminium salt3+Doping molar ratio be 3:5, the preferred yttrium nitrate hexahydrate of yttrium salt, aluminium salt is preferred
Nine water aluminum nitrates.
Further, in step 2, soaking time is preferably 5min.
Further, in step 3, the oxygen atmosphere that has is air, pure oxygen atmosphere.
Further, in step 3, heating rate is 5~20 °C, preferably 5 °C/min；Preferably 1500 °C of sintering temperature, heat preservation
Time preferred 1h.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention is at low cost, and preparation process is simple, and raw material sources are extensive, has excellent performance.
(2) the hollow fibre thermal conductivity of more solid YAG fiber, this method preparation promotes hot 500 °C of the face 51%().
Detailed description of the invention
Fig. 1 is yttrium-aluminium-garnet (YAG) X ray diffracting spectrum obtained in the embodiment of the present invention 1.
Fig. 2 is yttrium-aluminium-garnet (YAG) fiber SEM high magnification micro-structure diagram obtained in the embodiment of the present invention 1.
Fig. 3 is yttrium-aluminium-garnet (YAG) fiber SEM low range micro-structure diagram obtained in the embodiment of the present invention 1.
Fig. 4 is yttrium-aluminium-garnet (YAG) X ray diffracting spectrum obtained in the embodiment of the present invention 2.
Fig. 5 is yttrium-aluminium-garnet (YAG) fiber SEM high magnification micro-structure diagram obtained in the embodiment of the present invention 2.
Fig. 6 is yttrium-aluminium-garnet (YAG) fiber SEM low range micro-structure diagram obtained in the embodiment of the present invention 3.
Fig. 7 is yttrium-aluminium-garnet (YAG) fiber SEM high magnification micro-structure diagram obtained in the embodiment of the present invention 3.
Specific embodiment
Embodiment 1(5% aluminium salt)
In the ethanol solution for the 50vol% that nine water aluminum nitrates of the yttrium nitrate hexahydrate and 1.76g that take 1.07g are dissolved in 20ml.It will be wooden
Cotton fiber immerses in solution, extracts after impregnating 5min, takes out drying；By the bombax cotton after drying with the heating speed of 5 °C/min
Rate rises to 1500 °C, keeps the temperature 0.5h, hollow yttrium-aluminium-garnet (YAG) fiber is made.It was found from the X ray diffracting spectrum of Fig. 1
The material is yttrium-aluminium-garnet (YAG).Fig. 2,3 be yttrium-aluminium-garnet (YAG) fiber high and low multiplying power photo.It can be seen that fiber is in
Hollow form, and there is certain continuity.Since concentration is lower, product fiber tube wall is relatively thin and shrinks serious.
Embodiment 2(10% aluminium salt)
The Aluminum Chloride Hexahydrate of the yttrium nitrate hexahydrate and 3.52g that take 2.15g is dissolved in the ethanol solution of the 50vol% of 20ml.It will be wooden
Cotton fiber immerses in solution, extracts after impregnating 5min, takes out drying；By the bombax cotton after drying with the heating speed of 5 °C/min
Rate rises to 1500 °C, keeps the temperature 1h, hollow yttrium-aluminium-garnet (YAG) fiber is made.It should known to from the X ray diffracting spectrum of Fig. 4
Material is yttrium-aluminium-garnet (YAG).Fig. 5 is the high magnification photo of yttrium-aluminium-garnet (YAG) fiber, it is seen that fiber is compared with more fluffy
And there is certain continuity.After testing, the YAG of 10% concentration is 0.072 W/ (mK) in 500 DEG C of thermal conductivity, more in fact
Core fiber improves 51%.
Embodiment 3(30% aluminium salt)
In the ethanol solution for the 50vol% that nine water aluminum nitrates of the yttrium nitrate hexahydrate and 7.51g that take 4.60g are dissolved in 20ml.It will be wooden
Cotton fiber immerses in solution, extracts after impregnating 5min, takes out drying；By the bombax cotton after drying with the heating speed of 5 °C/min
Rate rises to 1600 °C, keeps the temperature 0.5h, hollow yttrium-aluminium-garnet (YAG) fiber is made.Fig. 6,7 are that SEM is low under the concentration, high magnification
Micro-structure diagram, it is evident that fiber tube wall is thicker, and pattern is more preferable, more smooth when compared with fiber surface low concentration.
Claims (9)
1. a kind of method for obtaining hollow yttrium-aluminium-garnet heat insulation fiber using bombax cotton, which is characterized in that its step are as follows:
Step 1, the ethanol solution of configuration aluminium salt, yttrium salt；
Step 2 immerses bombax cotton in above-mentioned solution, impregnates 1~10 minute, takes out, extracts and dry；
Step 3, by the resulting bombax cotton of step 2 under aerobic atmosphere, after keeping the temperature 1~5h under 1500 °C~1600 °C,
The yttrium-aluminium-garnet heat insulation fiber of hollow structure is made in furnace cooling.
2. the method as described in claim 1, which is characterized in that the concentration of ethanol solution is 50vol%.
3. the method as described in claim 1, which is characterized in that in step 1, the quality ratio of aluminium salt and ethanol solution is 5~
30:100, quality is than being preferably 10~20:100.
4. the method as described in claim 1, which is characterized in that yttrium salt is yttrium nitrate hexahydrate, and aluminium salt is nine water aluminum nitrates.
5. method as described in claim 1 or 4, which is characterized in that the Y in yttrium salt3+With the Al in aluminium salt3+Doping molar ratio
For 3:5.
6. the method as described in claim 1, which is characterized in that in step 2, soaking time 5min.
7. the method as described in claim 1, which is characterized in that in step 3, having oxygen atmosphere is air, pure oxygen atmosphere.
8. the method as described in claim 1, which is characterized in that in step 3, heating rate be 5~20 °C, preferably 5 °C/
min。
9. the method as described in claim 1, which is characterized in that sintering temperature is 1500 °C, soaking time 1h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174690A (en) * | 2020-10-12 | 2021-01-05 | 南京理工大学 | Method for preparing hollow aluminum titanate fiber by using kapok fiber |
| CN113233894A (en) * | 2021-06-04 | 2021-08-10 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of yttrium tantalate fiber high-temperature heat-insulating material |
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| JP2010070401A (en) * | 2008-09-16 | 2010-04-02 | Covalent Materials Corp | Yag polycrystalline substrate and method for polishing the same |
| CN102584202A (en) * | 2011-01-06 | 2012-07-18 | 中国科学院过程工程研究所 | Preparation method for YAG (Yttrium Aluminum Garnet) powder and reaction device thereof |
| CN106350899A (en) * | 2016-08-24 | 2017-01-25 | 南京理工大学 | Preparation method for hollow aluminum oxide fiber |
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| CN101595251A (en) * | 2006-10-05 | 2009-12-02 | 技术研究及发展基金有限公司 | microtubule and preparation method thereof |
| JP2010070401A (en) * | 2008-09-16 | 2010-04-02 | Covalent Materials Corp | Yag polycrystalline substrate and method for polishing the same |
| CN102584202A (en) * | 2011-01-06 | 2012-07-18 | 中国科学院过程工程研究所 | Preparation method for YAG (Yttrium Aluminum Garnet) powder and reaction device thereof |
| CN106350899A (en) * | 2016-08-24 | 2017-01-25 | 南京理工大学 | Preparation method for hollow aluminum oxide fiber |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112174690A (en) * | 2020-10-12 | 2021-01-05 | 南京理工大学 | Method for preparing hollow aluminum titanate fiber by using kapok fiber |
| CN113233894A (en) * | 2021-06-04 | 2021-08-10 | 中钢集团洛阳耐火材料研究院有限公司 | Preparation method of yttrium tantalate fiber high-temperature heat-insulating material |
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Application publication date: 20190614 |