CN104817322B - A kind of temperature-stable capacitor ceramic material Sr4euTiNb9o30and preparation method thereof - Google Patents
A kind of temperature-stable capacitor ceramic material Sr4euTiNb9o30and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of temperature-stable capacitor ceramic material Sr4EuTiNb9O30And preparation method thereof.By SrCO3, Eu2O3, TiO2And Nb2O5Ball milling in advance, refines raw material, according to stoichiometric proportion Sr4EuTiNb9O30Carry out dispensing, through pre-burning, secondary ball milling operation, utilize solid reaction process to prepare ceramic capacitor material Sr4EuTiNb9O30.The inventive method can obtain excellent temperature-stable ceramic capacitor material；The inventive method is simple, energy-saving and emission-reduction, moderate cost, is suitable for batch production.
Description
Technical field
The present invention relates to a kind of temperature-stable ceramic capacitor material Sr4EuTiNb9O30And preparation method thereof, belong to the technical field of ceramic material of electronic devices and components.
Background technology
Ceramic capacitor is the important foundation device of electronic information technology, along with developing rapidly of electronic device, it is desirable to ceramic capacitor can keep stable dielectric properties within the scope of wider temperature.In the fields such as military project, space flight and aviation and exploration, there is the biggest demand for the electronic devices and components of high temperature can be born.Current most of ceramic capacitor material capacity temperature characteristic has certain limitation.Therefore, research and development have the medium ceramic material of wide temperature stability, have important actual application value.It addition, most of ceramic capacitors use tungsten bronze structure based on perovskite structure, the present invention, contribute to the material type of expanded capacitor device pottery.
Summary of the invention
1. it is an object of the invention to provide a kind of temperature-stable ceramic capacitor material Sr4EuTiNb9O30And preparation method thereof.
2. the chemical constitution formula of the temperature-stable ceramic capacitor material that the present invention relates to is: Sr4EuTiNb9O30。
3. the method for said temperature stabilization type ceramic capacitor material concretely comprises the following steps:
(1) purity is more than the SrCO of 99.9%3, Eu2O3, TiO2And Nb2O5For initiation material, according to SrCO3: Eu2O3: TiO2: Nb2O5
The mol ratio of=4:0.5:1:4.5 carries out dispensing, adds in dehydrated alcohol, and mixing and ball milling 48 hours dries the powder preparing mix homogeneously；
(2) by the powder of step (1) 1000～1250 DEG C of pre-burnings 4 hours, the powder body after pre-burning is prepared；
(3) by the powder body after step (2) pre-burning, 48 hours mix homogeneously of ball milling in dehydrated alcohol, dry；Add 5 ~ 10wt% polyvinyl alcohol water solution and carry out pelletize, compressing after crossing 60 mesh sieves, it is subsequently placed in high temperature furnace air atmosphere, naturally cools to room temperature after sintering 4～10 hours at 1100～1400 DEG C, i.e. obtain described temperature-stable ceramic capacitor material Sr4EuTiNb9O30。
The preferred concentration of described polyvinyl alcohol water solution is 8wt%.
4. the present invention provides described temperature-stable ceramic capacitor material, and temperature stability is good.The present invention uses traditional solid phase method to prepare dielectric material, and under middle temperature, sintering gets final product the temperature-stable ceramic capacitor material of excellent, and technique is simple, with low cost, environmental sound.In China, medium ceramic material is among development, especially as the Special Medium pottery that these type of temperature a lot are relatively stable, studies the most perfect, the most unrealized scale industrialization.Thus, ceramic capacitor material provided by the present invention and preparation method thereof, there is good industrialization prospect.
Accompanying drawing explanation
1. Fig. 1 is the Sr that the embodiment of the present invention prepares4EuTiNb9O30The X-ray collection of illustrative plates of ceramic capacitor material；
2. Fig. 2 is the Sr that the embodiment of the present invention prepares4EuTiNb9O30The surface microstructure photo of ceramic capacitor material；
3. Fig. 3 is the Sr that the embodiment of the present invention prepares4EuTiNb9O30The dielectric constant with temperature Changing Pattern of ceramic capacitor material；
4. Fig. 4 is the Sr that the embodiment of the present invention prepares4EuTiNb9O30The temperature of ceramic capacitor material and rate of change of capacitance relation.
Detailed description of the invention
1. purity is more than the SrCO of 99.9%3, Eu2O3, TiO2And Nb2O5Raw material is stoichiometrically Sr4EuTiNb9O30Dispensing is put in ball grinder, selective oxidation zirconium ball and nylon tank；Added powder quality is the 8% of mill ball quality；Ball-milling Time is 48 hours, and rotating speed is 350 revs/min, and ball-milling medium is dehydrated alcohol；Products therefrom is placed in the baking oven of 100 DEG C drying 5 hours, first rises to 1200 DEG C of pre-burnings 4 hours with the heating rate of 5 DEG C/minute；Take out the powder body after pre-burning to grind, with dehydrated alcohol for medium 48 hours mix homogeneously of ball milling again, powdery is ground to form after drying, with PVOH aqueous solution (PVA) that mass percentage concentration is 5% as organic binder bond pelletize, depressing to a diameter of 12mm at 100MPa pressure after crossing 60 mesh sieve, thickness is the disc-shaped green compact of 1mm；Disk green compact are risen to 550 DEG C with the heating rate of 1.5 DEG C/minute, is incubated 4 hours discharge colloids and rises to 1300 DEG C with the heating rate of 5 DEG C/minute again, be incubated 10 hours, naturally cool to room temperature with stove, obtain ceramic capacitor material Sr4EuTiNb9O30。
Upper silver electrode is all burnt in the ceramic capacitor dielectric material both sides that the present embodiment prepares, makes wafer capacitance device, then test and calculate the relative dielectric constant variation with temperature of this dielectric material.The relative dielectric constant variation with temperature rule of sample as shown in Figure 3, Fig. 4 illustrates Sr intuitively4EuTiNb9O30Ceramic material has stable temperature characterisitic in the widest temperature range, proves that it can be as a kind of temperature-stable ceramic capacitor material further.
Claims (2)
1. a temperature-stable ceramic capacitor material, it is characterised in that the chemical constitution formula of described ceramic capacitor material is Sr4EuTiNb9O30；
The preparation process of described ceramic capacitor material is:
(1) purity is more than the SrCO of 99.9%3, Eu2O3, TiO2And Nb2O5For initiation material, according to SrCO3: Eu2O3: TiO2: Nb2O5
The mol ratio of=4:0.5:1:4.5 carries out dispensing, adds in dehydrated alcohol, and mixing and ball milling 48 hours dries the material preparing mix homogeneously；
(2) material step (1) produced was 1000～1250 DEG C of pre-burnings 4 hours, prepared the powder body after pre-burning；
(3) by the powder body after step (2) pre-burning, 48 hours mix homogeneously of ball milling in dehydrated alcohol, dry；Add 5 ~ 10wt% polyvinyl alcohol water solution pelletize, compressing after crossing 60 mesh sieves, it is subsequently placed in high temperature furnace air atmosphere, naturally cools to room temperature after sintering 4～10 hours at 1100～1400 DEG C, i.e. obtain described temperature-stable ceramic capacitor material Sr4EuTiNb9O30。
A kind of temperature-stable ceramic capacitor material the most according to claim 1, it is characterised in that in the preparation process of described ceramic capacitor material, the concentration of the polyvinyl alcohol water solution of addition is 8wt%.
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| CN106631018A (en) * | 2016-12-30 | 2017-05-10 | 桂林融通科技有限公司 | Stale-temperature dielectric material and preparation method thereof |
| CN106631019A (en) * | 2016-12-30 | 2017-05-10 | 桂林融通科技有限公司 | Temperature-stable-type ceramic dielectric material and preparation method thereof |
| CN106588009A (en) * | 2016-12-30 | 2017-04-26 | 桂林融通科技有限公司 | High-temperature-stability electric material and preparation method thereof |
| CN107188560B (en) * | 2017-07-24 | 2020-02-14 | 陕西欧西克电子有限公司 | Preparation method of ceramic capacitor material |
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| CN102249670A (en) * | 2011-04-15 | 2011-11-23 | 桂林理工大学 | Low temperature sintered microwave dielectric ceramic Li2Ba1-xSrxTi4O16 and preparation method thereof |
| CN104446468A (en) * | 2014-11-30 | 2015-03-25 | 桂林理工大学 | X9R ceramic capacitor dielectric material and preparation method thereof |
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Patent Citations (4)
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| CN101143317A (en) * | 2007-10-18 | 2008-03-19 | 桂林工学院 | Composite oxide photocatalyst containing niobium and preparation method |
| CN102211019A (en) * | 2011-03-24 | 2011-10-12 | 桂林理工大学 | Visible light-responsive composite oxide photochemical catalyst Ba1-xSrxLi2Ti6O14 and preparation method thereof |
| CN102249670A (en) * | 2011-04-15 | 2011-11-23 | 桂林理工大学 | Low temperature sintered microwave dielectric ceramic Li2Ba1-xSrxTi4O16 and preparation method thereof |
| CN104446468A (en) * | 2014-11-30 | 2015-03-25 | 桂林理工大学 | X9R ceramic capacitor dielectric material and preparation method thereof |
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