CN104844181B - A kind of electroceramics adding aluminum manufacturer sludge and preparation method thereof - Google Patents
A kind of electroceramics adding aluminum manufacturer sludge and preparation method thereof Download PDFInfo
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- CN104844181B CN104844181B CN201510220000.7A CN201510220000A CN104844181B CN 104844181 B CN104844181 B CN 104844181B CN 201510220000 A CN201510220000 A CN 201510220000A CN 104844181 B CN104844181 B CN 104844181B
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Abstract
The invention discloses a kind of electroceramics adding aluminum manufacturer sludge and preparation method thereof, raw material composition percentage: SiO2 10~20%、Al2O3 10~25%、Fe2O3 10~20%、TiO2 1~5%、CaO 2~10%、MgO 0~3%、K2O 5~15%、Na2O 3 ~ 8% and aluminum manufacturer sludge 2 ~ 15%.The present invention can not only promote the Crystallization Process of mullite phase in electroceramics by adding aluminum manufacturer sludge, is obviously enhanced the fracture strength of electroceramics；And achieve the recycling of garbage, there is important economic and social benefit.It is simple that the present invention prepares raw material, is easy to get, and process stabilizing is ripe, has reached practical and industrialized condition.
Description
Technical field
The invention belongs to high tension insulator field, be specifically related to a kind of electroceramics adding aluminum manufacturer sludge and preparation method thereof.
Background technology
High tension insulator refers to that rated voltage is at the electrotechnical porcelain product higher than 1kV.Refer mainly to for ultra-high-tension power transmission line and power station
With the insulating ceramics of various electrical appliances, also referred to as insulator, it it is the important component part of power industry.High tension insulator is according to contained by it
The difference of chemical composition is divided into siliceous electroceramics and aluminum matter electroceramics, and aluminum matter electroceramics is divided into aluminum matter porcelain and high-strength aluminum porcelain, according to electricity
The different application field of porcelain kind is the most different, and the electroceramics that the present invention relates to belongs to high-strength aluminum porcelain, is mainly used in supertension
Insulator or the insulator of high mechanical properties.Compared with external type of industry, domestic most enterprises technological level is poor, causes product
Quality is uneven.At present, intensity domestic, general porcelain is at 60-80kN/cm2, the intensity of high-strength ceramic is at 100-180kN/cm2,
The low 15%-25% of intensity than external homotype porcelain body.Therefore, electroceramics intensity deficiency is restriction the most prominent the asking of domestic high tension insulator
Topic.Relevant research shows, in electroceramics, the content of mullite phase is the key (silicic acid determining its mechanical performance especially fracture strength
Salt is circulated a notice of, and 2010,29 (6): 1472-1477).
In recent years, domestic electric ceramic industry adjusts production technology the most one after another, the formula of raw material, ball-milling technology, forming method,
The aspects such as calcining system all put into substantial amounts of human and material resources and undergo technological transformation and upgrade.Wherein, by adjusting powder material
Chemical composition and technological parameter, be the main path improving porcelain body performance at present.Such as West China Electric power Co,
Fushun high-tech Electric Manufacture company limited, leaf victory equality patent applicant are respectively by adding Kaolin and illite clay, changing
Property bentonite, commercial alumina etc. adjust composition of raw materials improve electroceramics performance (refer to ZL 201310719303.4, ZL
200610134907.2 with ZL 200510134951.9 etc.).Additionally, there is numerous aluminium manufacturers in China, single Fujian Province is sent out in Nei Jiuyou Fujian
Aluminum, Nan Ping Aluminum, put forth energy to pacify Aluminum etc. up to six.The sludge quantity of the annual output of aluminium manufacturer is many and consumes nowhere, becomes for two
Secondary pollutant, Shi Ge big business need to separately spend the problem that fund solves.
Summary of the invention
In order to solve the inferior position existing for above-mentioned domestic electroceramics and the process of aluminum manufacturer sludge, the invention provides one and add
Electroceramics adding aluminum manufacturer sludge and preparation method thereof, participates in the analysis of mullite phase in electroceramics by adding appropriate aluminum manufacturer sludge
Crystalline substance, thus improve the fracture strength of electroceramics, realize the recycling of garbage simultaneously, there is significant economic and social benefit.
The present invention implements by following technical solution:
A kind of electroceramics adding aluminum manufacturer sludge, raw material composition percentage: SiO2 10~20%、Al2O3 10~25%、
Fe2O3 10~20%、TiO2 1~5%、CaO 2~10%、MgO 0~3%、K2O 5~15%、Na2O 3 ~ 8% and aluminum manufacturer sludge 2 ~ 15%；Institute
Mainly comprising as α-AlOOH, content of the aluminum manufacturer sludge stated > 98%.
Preferably, raw material composition percentage: SiO2 10~20%、Al2O3 10~25%、Fe2O3 10~20%、
TiO2 1~3%、CaO 4~10%、MgO 0~2%、K2O 8~15%、Na2O 3 ~ 8% and aluminum manufacturer sludge 5 ~ 10%.
Preparation method comprises the following steps:
(1) dispensing；Raw material dries 12h respectively at 90 ~ 100 DEG C, weighs by formula, compounding ingredient；
(2) ball milling；Using zirconium ball, ball is 2:1 with the volume ratio of material, crosses 270 mesh sieves；
(3) except ferrum, press filt, old, pugging: crossing with the equipment for removing ferric ion of solenoid and permanent magnet and screen out ferrum, add water squeezing
After mud, moisture content is 22%, and the old time is 72h, and vacuum is pugging under 0.05 ~ 0.09MPa；
(4) molding；Vacuum is to carry out extruded under 0.01MPa, and molded samples is diameter 2.3cm, long 13.6cm
Column；
(5) it is dried；First dry in the shade 12h, then dries 48h at 90 ~ 100 DEG C；
(6) kiln sintering；Heating rate is 5 DEG C/min, 1000 DEG C of insulation 30min, 1150 ~ 1260 DEG C of insulation 30min.
The remarkable advantage of the present invention is:
(1) Al of high concentration is added3+Composition fluctuations is caused, for mullite phase (Al in electroceramics4.56Si1.44O9.72) analysis
The thermodynamic (al) driving force of brilliant offer；
(2) α-AlOOH is formed after 600 ~ 1050 DEG C of calcinings and has highly active aluminium oxide (β-Al2O3) (structural chemistry,
2003,22(5), P607-612).High activity β-Al2O3With the SiO in electroceramics2 is violentReaction, it is possible to remarkably promote in electroceramics not come
The crystallize of stone phase；
(3) kiln in-furnace temperature > 1100 DEG C time, β-Al2O3Start to be changed into α-Al2O3, α-Al2O3Can make in sintering process
For the core of nucleation process heterogeneous in electroceramics, also the precipitation for mullite crystalline phase provides substantial amounts of forming core place, promotes further
The Crystallization Process of mullite phase；
(4) present invention prepares raw material simply, is easy to get, and process stabilizing is ripe, has reached practical and industrialized condition.
Accompanying drawing explanation
Fig. 1 is the electroceramics adding different content aluminum manufacturer sludge fracture strength comparison diagram after 1230 DEG C of sintering.
Fig. 2 is the electroceramics adding 0% and 10% aluminum manufacturer sludge respectively XRD figure after 1230 DEG C of sintering.
Detailed description of the invention
A kind of electroceramics adding aluminum manufacturer sludge, raw material composition percentage: SiO2 10~20%、Al2O3 10~25%、
Fe2O3 10~20%、TiO2 1~5%、CaO 2~10%、MgO 0~3%、K2O 5~15%、Na2O 3 ~ 8% and aluminum manufacturer sludge 2 ~ 15%；Institute
Mainly comprising as α-AlOOH, content of the aluminum manufacturer sludge stated > 98%.
Preparation method comprises the following steps:
(1) dispensing；Raw material dries 12h respectively at 90 ~ 100 DEG C, weighs by formula, compounding ingredient；
(2) ball milling；Using zirconium ball, ball is 2:1 with the volume ratio of material, crosses 270 mesh sieves；
(3) except ferrum, press filt, old, pugging: crossing with the equipment for removing ferric ion of solenoid and permanent magnet and screen out ferrum, add water squeezing
After mud, moisture content is 22%, and the old time is 72h, and vacuum is pugging under 0.05 ~ 0.09MPa；
(4) molding；Vacuum is to carry out extruded under 0.01MPa, and molded samples is diameter 2.3cm, long 13.6cm
Column；
(5) it is dried；First dry in the shade 12h, then dries 48h at 90 ~ 100 DEG C；
(6) kiln sintering；Heating rate is 5 DEG C/min, 1000 DEG C of insulation 30min, 1150 ~ 1260 DEG C of insulation 30min.
Table 1 is electroceramics component table (mass percent) in embodiment 1-5
Embodiment 1: the preparation of electroceramics and sintering
According to the proportioning of each component of table 1, weigh a certain amount of raw material (Samantabhadra soil, Xia Xitu, elutriation soil, lithium Anhydrite, Zhang
State soil, flint clay, feldspar powder, bauxite, aluminum manufacturer sludge), then according to aforesaid pottery preparation process carries out ball milling successively, removes
Ferrum, press filt, old, pugging, molding and the operation such as be dried.Dried sample is placed in program control stove and is sintered.Fig. 1 is for adding
Fracture strength schematic diagram after different content aluminum manufacturer sludge sintering.Fig. 1 shows, adds the sample of 2% aluminum manufacturer sludge, and its fracture is strong
Degree is 1291 ± 16MPa.
Embodiment 2: the preparation of electroceramics and sintering
According to the proportioning of each component of table 1, weigh a certain amount of raw material (Samantabhadra soil, Xia Xitu, elutriation soil, lithium Anhydrite, Zhang
State soil, flint clay, feldspar powder, bauxite, aluminum manufacturer sludge), then according to the technique of example 1 prepares electroceramics.As it is shown in figure 1, add
Adding the sample of 5% aluminum manufacturer sludge, its fracture strength is 1388 ± 13MPa.
Embodiment 3: the preparation of electroceramics and sintering
According to the proportioning of each component of table 1, weigh a certain amount of raw material (Samantabhadra soil, Xia Xitu, elutriation soil, lithium Anhydrite, Zhang
State soil, flint clay, feldspar powder, bauxite, aluminum manufacturer sludge), then according to the technique of example 1 prepares electroceramics.As it is shown in figure 1, add
Adding the sample of 8% aluminum manufacturer sludge, its fracture strength is 1524 ± 17MPa.
Embodiment 4: the preparation of electroceramics and sintering
According to the proportioning of each component of table 1, weigh a certain amount of raw material (Samantabhadra soil, Xia Xitu, elutriation soil, lithium Anhydrite, Zhang
State soil, flint clay, feldspar powder, bauxite, aluminum manufacturer sludge), then according to the technique of example 1 prepares electroceramics.As it is shown in figure 1, add
The fracture strength adding 10% aluminum manufacturer sludge sample is 1624 ± 15MPa.Fig. 2 is this embodiment and the formula being not added with aluminum manufacturer sludge
XRD figure after sintering.Obviously, add aluminum manufacturer sludge and can dramatically increase the relative amount of mullite phase in sample.This example is excellent
Select example.
Embodiment 5: the preparation of electroceramics and sintering
According to the proportioning of each component of table 1, weigh a certain amount of raw material (Samantabhadra soil, Xia Xitu, elutriation soil, lithium Anhydrite, Zhang
State soil, flint clay, feldspar powder, bauxite, aluminum manufacturer sludge), then according to the technique of example 1 prepares electroceramics.As it is shown in figure 1, add
Adding 15% aluminum manufacturer sludge sample fracture strength is 1811 ± 15MPa.This example is preference.
The present invention obtains the electroceramics with high fracture strength by above-mentioned enforcement.Its significant effect embodies a concentrated reflection of electricity
In the lifting of porcelain fracture strength.As seen from the above embodiment, when adding aluminum manufacturer sludge content and reaching 15-20%, it is possible to significantly promote
The crystallize of mullite phase in sample introduction product, thus it is effectively improved the intensity of electroceramics.
The invention mainly relates to high tension insulator field, can make variously-shaped for use as required.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with
Modify, all should belong to the covering scope of the present invention.
Claims (2)
1. the electroceramics adding aluminum manufacturer sludge, it is characterised in that: raw material composition percentage: SiO2 10~20%、
Al2O3 10~25%、Fe2O3 10~20%、TiO2 1~5%、CaO 2~10%、MgO 0~3%、K2O 5~15%、Na2O 3 ~ 8% and aluminum
Factory's mud 2 ~ 15%；The percetage by weight sum of above-mentioned raw materials composition is 100%；Described aluminum manufacturer sludge mainly comprise for α-
AlOOH, content > 98%；Its preparation process comprises the following steps:
(1) dispensing；Raw material dries 12h respectively at 90 ~ 100 DEG C, weighs by formula, compounding ingredient；
(2) ball milling；Using zirconium ball, ball is 2:1 with the volume ratio of material, crosses 270 mesh sieves；
(3) except ferrum, press filt, old, pugging: cross with the equipment for removing ferric ion of solenoid and permanent magnet and screen out ferrum, after the press filt that adds water
Moisture content is 22%, and the old time is 72h, and vacuum is pugging under 0.05 ~ 0.09MPa；
(4) molding；Vacuum be carry out under 0.01MPa extruded；
(5) it is dried；First dry in the shade 12h, then dries 48h at 90 ~ 100 DEG C；
(6) kiln sintering；Heating rate is 5 DEG C/min, 1000 DEG C of insulation 30min, 1150 ~ 1260 DEG C of insulation 30min.
The electroceramics of interpolation aluminum manufacturer sludge the most according to claim 1, it is characterised in that: raw material composition weight percent
Meter: SiO2 10~20%、Al2O3 10~25%、Fe2O3 10~20%、TiO2 1~3%、CaO 4~10%、MgO 0~2%、K2O 8~15%、
Na2O 3 ~ 8% and aluminum manufacturer sludge 5 ~ 10%；The percetage by weight sum of above-mentioned raw materials composition is 100%.
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| CN102718467A (en) * | 2012-06-11 | 2012-10-10 | 浙江贝爱达电瓷电器制造有限责任公司 | Circuit ceramic material composition and preparation process thereof |
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| CN101857424A (en) * | 2010-05-27 | 2010-10-13 | 中国科学院地球化学研究所 | Method for selecting and proportioning blank raw materials of 550kN grade suspension type porcelain insulator |
| CN104402400A (en) * | 2014-10-25 | 2015-03-11 | 青岛拓联信息技术有限公司 | High performance electric ceramic |
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