CN108178627A - A kind of preparation method of yttria-stabilized zirconia ceramic core - Google Patents
A kind of preparation method of yttria-stabilized zirconia ceramic core Download PDFInfo
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- CN108178627A CN108178627A CN201611120082.9A CN201611120082A CN108178627A CN 108178627 A CN108178627 A CN 108178627A CN 201611120082 A CN201611120082 A CN 201611120082A CN 108178627 A CN108178627 A CN 108178627A
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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Abstract
Ceramic core is made through dispensing, mixing, sieving, heating, cooling, molding and high-temperature roasting by following raw material % by weight in a kind of preparation method of yttria-stabilized zirconia ceramic core.The raw material consists of the following compositions：Zirconia powder 70 75% aoxidizes yttrium powder 8.5 14%, Paris white 8 12%, Zirconium oxide fibre 2.2 5%, nano oxidized zirconium powder 1.5 2%, paraffin 4 8%, beeswax 0.2 0.4%, polyethylene 0.1 0.3%, oleic acid 0.4 0.6%.The preparation method can significantly improve precision castings inner cavity quality, while during can avoiding essence casting, and due to insufficient strength, caused disconnected core phenomenon substantially increases qualified cast rate.
Description
Technical field
The present invention relates to a kind of high stability, high-strength ceramic cores, are mainly used in precision-investment casting field.
Background technology
Ceramic core is the adapter to form precision castings complexity hollow lumen structure, the surface quality and ruler of precision castings inner cavity
Very little precision is determined completely by ceramic core, therefore it is required that ceramic core material will have good high-temperature stability, to ensure
Any react cannot occur with molten metal bath in casting cycle；In addition in use, ceramic core needs bear pressure wax
When wax liquor and casting when high-temperature molten metal liquid impact, it is therefore desirable to have enough intensity.Existing ceramic core is mainly adopted
It is prepared with silica, it is impossible to meet the demands of actual production for stability and intensity.
Invention content
The present invention mainly solves stability and insufficient strength of the existing technology, shadow for the purpose of solving the above problems
The technical issues of ringing precision castings product quality, and a kind of high stability, high-strength ceramic core are provided.
To achieve the above object, the present invention uses following technical proposals：High stability, high-strength ceramic core, by following
Raw materials by weight forms, wherein zirconia powder 70-75%, aoxidizes yttrium powder 8.5-14%, Paris white 8-12%, oxidation
Zirconium fiber 2.2-5%, nano oxidized zirconium powder 1.5-2%, paraffin 4-8%, beeswax 0.2-0.4%, polyethylene 0.1-0.3% are oily
Sour 0.4-0.6%.
Preparation method：Zirconia powder, oxidation yttrium powder, Paris white, Zirconium oxide fibre are crossed into 325 mesh standard sieves respectively, taken
Lower part of screen point.Then it is mixed in following ratios：Zirconia powder 70-75% aoxidizes yttrium powder 8.5-14%, Paris white 8-12%,
Zirconium oxide fibre 2.2-5%, nano oxidized zirconium powder 1.5-2%, paraffin 4-8%, beeswax 0.2-0.4%, polyethylene 0.1-
In 105 DEG C of heating powder to be made in 2 hours spare after mixing in 0.3%, oleic acid 0.4-0.6%；Paraffin 4-8%, beeswax 0.2-
0.6%, polyethylene 0.1-0.3% are uniformly mixed at 120 DEG C, and it is spare that plasticizer is made in 325 mesh standard sieves excessively.By batch mixer
120 DEG C are warming up to, adds in prepared plasticizer, then adds in the above-mentioned powder mixed while stirring, powder all adds
After continue stirring 12 hours, pour out cooling and material ingot be made.If form is made according to mold with ceramic core molding machine in above-mentioned material ingot
The ceramic core green compact of shape.Ceramic core is made through 1190-1320 DEG C of high-temperature roasting in green compact.
The features of the present invention and advantageous effect
The ceramic core material has good high-temperature stability and enough intensity, can significantly improve precision castings inner cavity
Quality, while during can avoiding essence casting, due to insufficient strength, caused disconnected core phenomenon substantially increases qualified cast rate.
The material system that the present invention uses can avoid reacting with core material in high temperature casting process molten metal, be produced in core cavity
Raw reactivity defect.
Specific embodiment
Embodiment one
Zirconia powder 70%, oxidation yttrium powder 8.5%, Paris white 8%, Zirconium oxide fibre 4% are taken, crosses 325 targets respectively
Quasi- sieve, takes lower part of screen point to be mixed with nano oxidized zirconium powder 2% and oleic acid 0.4%, heated after mixing at 105 DEG C 2 hours it is spare, take
Paraffin 6.5%, beeswax 0.4%, polyethylene 0.2% are uniformly mixed at 120 DEG C, and it is standby that plasticizer is made in 325 mesh standard sieves excessively
With.Batch mixer is warming up to 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed, powder while stirring
Continue stirring 12 hours after all adding, pour out cooling and material ingot is made.
Embodiment two
Zirconia powder 72%, oxidation yttrium powder 8.2%, Paris white 10%, Zirconium oxide fibre 2.2% are taken, crosses 325 mesh respectively
Standard screen takes lower part of screen point to be mixed with nano oxidized zirconium powder 2% and oleic acid 0.6%, heated after mixing at 105 DEG C 2 hours it is spare,
Paraffin 4.3%, beeswax 0.4%, polyethylene 0.3% are taken, is uniformly mixed at 120 DEG C, it is standby that plasticizer is made in 325 mesh standard sieves excessively
With.Batch mixer is warming up to 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed, powder while stirring
Continue stirring 12 hours after all adding, pour out cooling and material ingot is made.
Embodiment three
Zirconia powder 75%, oxidation yttrium powder 8.5%, Paris white 8%, Zirconium oxide fibre 2.2% are taken, crosses 325 mesh respectively
Standard screen takes lower part of screen point to be mixed with nano oxidized zirconium powder 1.5% and oleic acid 0.4%, heated after mixing at 105 DEG C 2 hours it is standby
With, paraffin 4%, beeswax 0.3%, polyethylene 0.1% are taken, it is uniformly mixed at 120 DEG C, it crosses 325 mesh standard sieves and plasticizer is made
It is spare.Batch mixer is warming up to 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed, powder while stirring
Material continues stirring 12 hours after all adding, pour out cooling and material ingot is made.
Example IV
Zirconia powder 70.5%, oxidation yttrium powder 9%, Paris white 8%, Zirconium oxide fibre 3% are taken, crosses 325 targets respectively
Quasi- sieve, takes lower part of screen point to be mixed with nano oxidized zirconium powder 0.5% and oleic acid 0.8%, heated after mixing at 105 DEG C 2 hours it is spare,
Paraffin 7.7%, beeswax 0.3%, polyethylene 0.2% are taken, is uniformly mixed at 120 DEG C, it is standby that plasticizer is made in 325 mesh standard sieves excessively
With.Batch mixer is warming up to 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed, powder while stirring
Continue stirring 12 hours after all adding, pour out cooling and material ingot is made.
Above-mentioned material ingot ceramic core molding machine, the ceramic core green compact of several shapes are made through 1190- according to mold
Ceramic core is made in 1320 DEG C of high-temperature roastings.
The present invention and the intensity technique Indexes Comparison such as following table of existing product：
| Intensity | |
| Existing ceramic core | ≤20MPa |
| Ceramic core of the present invention | 35-40MPa |
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modification made within refreshing and principle, equivalent replacement and improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of preparation method of yttria-stabilized zirconia ceramic core, which is characterized in that include the following steps：
1) prepare raw material：By zirconia powder, oxidation yttrium powder, Paris white, Zirconium oxide fibre crosses 325 mesh standard sieves, takes sieve respectively
Then lower part is mixed raw material by following weight % ratios：Zirconia powder 70-75% aoxidizes yttrium powder 8.5-14%, Paris white
8-12%, Zirconium oxide fibre 2.2-5%, nano oxidized zirconium powder 1.5-2%, paraffin 4-8%, beeswax 0.2-0.4%, polyethylene
0.1-0.3%, oleic acid 0.4-0.6%；
2) that in 105 DEG C of heating the mixed raw material of step 1) was made powder in 2 hours is spare；
3) it by paraffin 4-8%, beeswax 0.2-0.4%, polyethylene 0.1-0.3%, is uniformly mixed at 120 DEG C, it is accurate to cross 325 targets
Sieve series is spare into plasticizer；
4) batch mixer is warming up to 120 DEG C, adds in prepared plasticizer, then add in the above-mentioned powder mixed while stirring
Material, powder continue stirring 12 hours, pour out cooling and material ingot is made after all adding；
5) step 4) material ingot obtained is made to the ceramic core green compact of several shapes, green compact with ceramic core molding machine according to mold
Ceramic core is made through 1190-1320 DEG C of high-temperature roasting.
2. the preparation method of yttria-stabilized zirconia ceramic core as described in claim 1, it is characterised in that：Take zirconium oxide
Powder 70%, oxidation yttrium powder 8.5%, Paris white 8%, Zirconium oxide fibre 4%, cross 325 mesh standard sieves respectively, take lower part of screen point with
Nano oxidized zirconium powder 2% and oleic acid 0.4% mix, after mixing 105 DEG C heating 2 hours it is spare, take paraffin 6.5%, beeswax
0.4%th, polyethylene 0.2% is uniformly mixed at 120 DEG C, and it is spare that plasticizer is made in 325 mesh standard sieves excessively；Batch mixer is heated up
To 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed while stirring, powder continues after all adding
Stirring 12 hours, pours out cooling and material ingot is made.
3. the preparation method of yttria-stabilized zirconia ceramic core as described in claim 1, it is characterised in that:Take zirconium oxide
Powder 72%, oxidation yttrium powder 8.2%, Paris white 10%, Zirconium oxide fibre 2.2%, cross 325 mesh standard sieves, take lower part of screen respectively
Point mixed with nano oxidized zirconium powder 2% and oleic acid 0.6%, heated after mixing at 105 DEG C 2 hours it is spare, take paraffin 4.3%, bee
Wax 0.4%, polyethylene 0.3% are uniformly mixed at 120 DEG C, and it is spare that plasticizer is made in 325 mesh standard sieves excessively；Batch mixer liter
For temperature to 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed while stirring, powder all adds subsequent
Continuous stirring 12 hours, pours out cooling and material ingot is made.
4. the preparation method of yttria-stabilized zirconia ceramic core as described in claim 1, it is characterised in that：Take zirconium oxide
Powder 75%, oxidation yttrium powder 8.5%, Paris white 8%, Zirconium oxide fibre 2.2%, cross 325 mesh standard sieves, take lower part of screen point respectively
Mixed with nano oxidized zirconium powder 1.5% and oleic acid 0.4%, after mixing 105 DEG C heating 2 hours it is spare, take paraffin 4%, beeswax
0.3%th, polyethylene 0.1% is uniformly mixed at 120 DEG C, and it is spare that plasticizer is made in 325 mesh standard sieves excessively；Batch mixer is heated up
To 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed while stirring, powder continues after all adding
Stirring 12 hours, pours out cooling and material ingot is made.
5. the preparation method of yttria-stabilized zirconia ceramic core as described in claim 1, which is characterized in that take zirconium oxide
Powder 70.5%, oxidation yttrium powder 9%, Paris white 8%, Zirconium oxide fibre 3%, cross 325 mesh standard sieves respectively, take lower part of screen point with
Nano oxidized zirconium powder 0.5% and oleic acid 0.8% mix, after mixing 105 DEG C heating 2 hours it is spare, take paraffin 7.7%, beeswax
0.3%th, polyethylene 0.2% is uniformly mixed at 120 DEG C, and it is spare that plasticizer is made in 325 mesh standard sieves excessively；Batch mixer is heated up
To 120 DEG C, addition prepares plasticizer, then adds in the above-mentioned powder mixed while stirring, powder continues after all adding
Stirring 12 hours, pours out cooling and material ingot is made.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793033A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Ceramic core material for precision casting of Titanium alloy |
| CN1793012A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Ceramic core material by composited inorganic fibre |
| CN101429024A (en) * | 2008-12-05 | 2009-05-13 | 辽宁省轻工科学研究院特铸材料有限公司 | Compound ceramic mould core material employing nano-zirconium oxide |
| CN101429023A (en) * | 2008-12-05 | 2009-05-13 | 辽宁省轻工科学研究院特铸材料有限公司 | Compound zirconia ceramics core material employing inorfil |
| CN104446453A (en) * | 2013-09-18 | 2015-03-25 | 辽宁省轻工科学研究院 | Ceramic core with high stability and high strength |
| US20150239037A1 (en) * | 2012-10-25 | 2015-08-27 | Beihang University | Calcium oxide-based ceramic core and preparation method thereof |
| CN105418058A (en) * | 2015-11-16 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of low-deformation toughened silica-based ceramic core |
-
2016
- 2016-12-08 CN CN201611120082.9A patent/CN108178627A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1793033A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Ceramic core material for precision casting of Titanium alloy |
| CN1793012A (en) * | 2005-11-29 | 2006-06-28 | 辽宁省轻工科学研究院 | Ceramic core material by composited inorganic fibre |
| CN101429024A (en) * | 2008-12-05 | 2009-05-13 | 辽宁省轻工科学研究院特铸材料有限公司 | Compound ceramic mould core material employing nano-zirconium oxide |
| CN101429023A (en) * | 2008-12-05 | 2009-05-13 | 辽宁省轻工科学研究院特铸材料有限公司 | Compound zirconia ceramics core material employing inorfil |
| US20150239037A1 (en) * | 2012-10-25 | 2015-08-27 | Beihang University | Calcium oxide-based ceramic core and preparation method thereof |
| CN104446453A (en) * | 2013-09-18 | 2015-03-25 | 辽宁省轻工科学研究院 | Ceramic core with high stability and high strength |
| CN105418058A (en) * | 2015-11-16 | 2016-03-23 | 沈阳黎明航空发动机(集团)有限责任公司 | Making method of low-deformation toughened silica-based ceramic core |
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