The preparation method of a kind of Longquan celadon reinforced blank and products thereof
Technical field
The present invention relates to the preparation method of a kind of Longquan celadon reinforced blank and products thereof, belong to Longquan celadon household china, building decoration porcelain, packing porcelain (bottle) production field.
Background technology
Longquan celadon was risen in five generations of Tang end, and the Southern Song Dynasty to the Yuan Dynasty reaches prosperous, begins decline after the Late Ming Dynasty, and production history reaches thousand, a kiln system that be that the firing time is the longest on the Chinese porcelain making history, distribution range is the widest, has the greatest impact.That Longqun Cave produces is of a great variety, have good quality, and especially is world-famous for " thousand peaks in emerald colour " and " as ice like jade " sparkling and crystal-clear glaze, and for a long time, Longquan celadon is offering convenience and aesthetic feeling for daily life.In the very long years, Longquan celadon is travelled across the oceans as the carrier of Chinese culture, economy, becomes the envoy of friendship who links up Chinese and foreign cultural exchange, overseas trade, by being favored countries in the world.For this reason, country has lost " Longquan celadon technology " organize to Shen, the world as unique " immaterial legacy protection " project of Chinese pottery industry and has declared.
Yet entered since 21st century, along with improving constantly of living standards of the people, people are more and more higher for the requirement of daily living article, past, brilliant history was earned the share in many markets to Longquan celadon, but people no longer are satisfied with history in the past, but require tradition name porcelain to have the various new functions that meet requirements of the times.In household china, porcelain bottle production, though the appearance of celadon has received great concern, the expansion that low this problem of celadon intensity has had a strong impact on produce market particularly brings unnecessary loss owing to colliding in transportation, cargo handling process.Therefore, the intensity that improves Longquan celadon has become the bottleneck of celadon enterprise development, up to now, also lacks the improvement technology of this respect in the manufacturing enterprise of existing Longquan celadon.
At present, the ceramic reinforced technology mainly contains the following aspects:
(1), refined crystalline strengthening
By rational technology controlling and process grain-size, make uniform crystal particles, refinement, promote carcass densification (Zhang Yubing brief talks the intensity and the reinforcement of pottery, " Hebei pottery ", vol.26, no.3,1998).
(2), grain-boundary strengthening
By changing the mechanical behavior under high temperature that the behavior of ceramic interface can improve stupalith, i.e. grain-boundary strengthening.The crystal boundary phenomenon of pottery all has great effect to mechanical properties such as the breaking tenacity of pottery, toughness, viscous deformation, high temperature creeps.As the ceramic body of liquid phase sintering, cooling back liquid phase is stayed on the crystal boundary with vitreous state and is made material at high temperature mechanical property deterioration.The effective ways of grain-boundary strengthening are to make the crystallization of crystal boundary glassy phase by thermal treatment.Practice shows that this method is to improving ceramic high temperature mechanical property effect significantly (Qiu Guanming, new ceramics, Beijing: weapon industry press, 1993).
(3), phase transformation strengthening
Come intensified ceramic (Zhang Yubing brief talks the intensity and the reinforcement of pottery, " Hebei pottery ", vol.26, no.3,1998) by controlling ceramic intravital phase transformation.
(4), complex intensifying
Complex intensifying strengthens ceramic matrix particle and fiber composite exactly.Different strengthening phases can make material have different mechanical property (Zhang Yubing brief talks the intensity and the reinforcement of pottery, " Hebei pottery ", vol.26, no.3,1998).
The Longquan celadon carcass adopts is raw material based on the porcelain stone of this real estate of dragon's fountain, forms through 1280-1350 ℃ of high-temperature calcination, has the advantages that high silicon hangs down aluminium.Its glaze is to be the Chinese traditional high calcium glaze system of tinting material with the ferric oxide.Glaze is sparkling and crystal-clear, and glaze pure green colour such as kingfisher are harmless, thereby Longquan celadon is highly suitable for the production field of household china, building decoration porcelain and packing porcelain (bottle).But celadon intensity is lower, generally at 60mpa.This problem has had a strong impact on the Product Safety of enterprise, particularly brings unnecessary loss owing to colliding in transportation, cargo handling process.
Summary of the invention
For solving low this problem of Longquan celadon intensity, the invention provides the preparation method of a kind of Longquan celadon reinforced blank and products thereof.
A kind of Longquan celadon reinforced blank, according to weight percent meter, composed of the following components:
Nanometer α-Al
2O
3Powder 12%~25%
Celadon base mud powder 71%~87%
Useless porcelain powder 1%~4%
The celadon base mud powder of the porcelain stone preparation of raw material of dragon's fountain this locality got final product when described celadon base mud powder adopted tradition to fire celadon, the general 200-250 mesh sieve of crossing of particle diameter.
The chemical constitution of the celadon mud powder of dragon's fountain this locality is generally as follows:
Composition |
??Na
2O
|
??K
2O
|
??CaO |
??MgO |
??SiO
2 |
??Al
2O
3 |
??Fe
2O
3 |
??TiO
2 |
Content % (weight) |
??0.4-??0.8 |
??4.0-??5.0 |
??0.9-??1.5 |
??0.12-??0.49 |
??64.0-??72.0 |
??17.0-??21.0 |
??0.8-??1.8 |
??0.03-??0.1 |
The raw material of described useless porcelain powder adopts by the useless porcelain relic of local celadon.The control fineness of will giving up after broken behind the ceramics pick, the fine grinding is standby, and fineness control particle diameter is crossed 120 purposes sieve.Adopting a spot of useless porcelain powder is utilization of waste material on the one hand, and the protection environment saves material, and is that an amount of useless porcelain powder can the acceleration of sintering process on the other hand, reduces firing temperature.Because nanometer α-Al
2O
3Adding, cause the firing temperature of product to increase, a spot of useless porcelain powder can play the shock absorption of a temperature.
Described nanometer α-Al
2O
3It is 40-80nm that the powder optimum is chosen particle diameter, reaches the effect of disperse refined crystalline strengthening.
A kind of method that adopts above-mentioned Longquan celadon reinforced blank to burn till product comprises the steps:
(1) it is standby celadon base mud to be dried into celadon base mud powder;
(2) in celadon base mud powder, add nanometer α-Al
2O
3Powder and useless porcelain powder, the butt powder is pressed proportion ingredient, adds water for ball milling and mixes, and it is old standby to obtain Longquan celadon reinforced slurry blank;
(3) the Longquan celadon reinforced blank slurry is used casting, the dry demoulding is dried behind the repaired biscuit reason base;
(4) the process biscuiting earlier of the work in-process after the shaping, 650-850 ℃ of biscuiting temperature, loading of kiln after glazing, drying again, high temperature burns till under reducing atmosphere, firing temperature 1330-1380 ℃.
Step (3) and (4) specifically can be, and Longquan celadon reinforced blank is made grout material or mud section, adopt the casting or the demoulding of rolling forming after drying, through repaired biscuit, reason base, biscuiting in the kiln of packing into after the drying, 600-850 ℃ of biscuiting temperature, no atmosphere requirement.Pick behind the kiln discharge, glazing (soaking glaze or glaze spraying), dry back is fired into the celadon product, firing temperature 1330-1380 ℃ under reducing atmosphere.
Described celadon mud, the processes such as slurry, old, oven dry of changing are the conventional process in the celadon preparation.
The inventive method can make Longquan celadon intensity improve on original basis more than 50%, improves the celadon carcass strength and reaches more than the 100mpa.
The present invention is keeping under the constant prerequisite of characteristics such as traditional Longquan celadon prescription, Technology and product style, utilization nanometer α-Al
2O
3Novel material has been prepared has high-intensity Longquan celadon blank, owing to do not change its processing technology routine substantially, do not change to burn till and install fully and calcining system, therefore, although material cost increases, firing temperature increases, but the total materials amount of implements can reduce, and the high-intensity performance of product makes the breakage rate of finished product reduce greatly, so comprehensive cost improves about 8%, average sale price improves 18%, and profit on sales is expected to improve about 10%, and economic benefit is very remarkable.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Embodiment 1
The celadon base mud powder of 82g dragon's fountain this locality is crossed 200 mesh sieves, with nanometer α-Al of useless porcelain powder of 3g 120 purposes and 15g 40-80nm
2O
3Powder mixes stirs, and changes slurry, old (standby as grout material).
Injection forming then, after the demoulding drying, through the repaired biscuit moisturizing, at 700 ℃ of following biscuiting 6h, the base after the biscuiting is put into the klining of high temperature liquefied gas again after soaking glaze, drying after the seasoning, and 1350 ℃ of top temperatures insulation were down burnt till in 1 hour.
The folding strength of products obtained therefrom is 79.67mpa.
Embodiment 2
The celadon base mud powder of 77g dragon's fountain this locality is crossed 200 mesh sieves, with nanometer α-Al of useless porcelain powder of 3g 120 purposes and 20g 40-80nm
2O
3Powder mixes stirs, and changes slurry, old (standby as grout material).
Injection forming then, demoulding drying are after the repaired biscuit moisturizing, and at 800 ℃ of following biscuiting 6h, the base after the biscuiting is put into the klining of high temperature liquefied gas again after soaking glaze, drying after the seasoning, and 1360 ℃ of top temperatures insulation were down burnt till in 1 hour.
The folding strength of products obtained therefrom is 88.25mpa.
Embodiment 3
The celadon base mud powder of 70g dragon's fountain this locality is crossed 200 mesh sieves, with nanometer α-Al of useless porcelain powder of 2g 120 purposes and 25g 40-80nm
2O
3Powder mixes stirs, and changes slurry, old (standby as grout material).
Injection forming then, demoulding drying are after the repaired biscuit moisturizing, and at 800 ℃ of following biscuiting 6h, the base after the biscuiting is put into the klining of high temperature liquefied gas again after soaking glaze, drying after the seasoning, and 1380 ℃ of top temperatures insulation were down burnt till in 1 hour.
The folding strength of products obtained therefrom is 103.06mpa.