CN107285762A - A kind of high pressure low-loss ceramic capacitor dielectric and preparation method thereof - Google Patents

A kind of high pressure low-loss ceramic capacitor dielectric and preparation method thereof Download PDF

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CN107285762A
CN107285762A CN201710487075.0A CN201710487075A CN107285762A CN 107285762 A CN107285762 A CN 107285762A CN 201710487075 A CN201710487075 A CN 201710487075A CN 107285762 A CN107285762 A CN 107285762A
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high pressure
ceramic capacitor
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pressure low
capacitor dielectric
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陈映义
牛继恩
曹彦运
陈应和
王新婷
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Shantou Rui Sheng Electronics Co Ltd
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Shantou Rui Sheng Electronics Co Ltd
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Abstract

A kind of high pressure low-loss ceramic capacitor dielectric, the raw material matched by following weight is made：BaTiO355 90%, SrTiO32 25%, CoNb2O62 15%, Bi2(SnO3)30.05 10%, MnNb2O60.03 1.0%, ZnO 0.1 1.5%, MnO20.03‑1.0%.The present invention also provides a kind of preparation method of above-mentioned high pressure low-loss ceramic capacitor dielectric.The high pressure low-loss ceramic capacitor dielectric dielectric constant of the present invention is high, proof voltage is high and dielectric loss is small, free from environmental pollution during preparation and use, and can sinter at a lower temperature.

Description

A kind of high pressure low-loss ceramic capacitor dielectric and preparation method thereof
Technical field
The present invention relates to technical field of inorganic nonmetallic materials, and in particular to a kind of high pressure low-loss ceramic capacitor dielectric And the preparation method of this high pressure low-loss ceramic capacitor dielectric.
Background technology
The fields such as colour TV, computer, communication, Aero-Space, guided missile, navigation are in the urgent need to breakdown voltage is high, temperature stability Good, reliability height, miniaturization, the ceramic capacitor of Large Copacity.
Be generally employed to produce in the medium of high voltage ceramic capacitor contain a certain amount of lead, this not only production, using and Human body and environment are caused harm in waste procedures, and also have harmful effect to stability.
In existing ceramic capacitor dielectric, though some media belong to unleaded dielectric material, its resistance to pressure is poor, and dielectric is normal Number is too small；And although some medium dielectric constants are high, resistance to pressure is too poor；Although some medium dielectric constants are very high, medium Loss is larger, and resistance to pressure is poor.It can be seen that, existing ceramic capacitor dielectric can not take into account high-k, low dielectric loss and The requirement of each side such as high withstand voltage.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high pressure low-loss ceramic capacitor dielectric and this height The preparation method of loss ceramic capacitor dielectric is forced down, this high pressure low-loss ceramic capacitor dielectric dielectric constant is high, resistance to electricity Pressure is high and dielectric loss is small, free from environmental pollution during preparation and use, and can sinter at a lower temperature.Use Technical scheme is as follows：
A kind of high pressure low-loss ceramic capacitor dielectric, it is characterised in that the raw material matched by following weight is made： BaTiO3 55-90%, SrTiO32-25%, CoNb2O62-15%, Bi2(SnO3)30.05-10%, MnNb2O6 0.03-1.0%, ZnO 0.1-1.5%, MnO2 0.03-1.0%。
In a kind of preferred scheme, the raw material that above-mentioned high pressure low-loss ceramic capacitor dielectric is matched by following weight is made： BaTiO360-86%, SrTiO33-22%, CoNb2O63-12%, Bi2(SnO3)30.5-8%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
In another preferred scheme, the raw material system that above-mentioned high pressure low-loss ceramic capacitor dielectric is matched by following weight Into：BaTiO365-83%, SrTiO33-19%, CoNb2O64-10%, Bi2(SnO3)31-6%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
In another preferred scheme, the raw material system that above-mentioned high pressure low-loss ceramic capacitor dielectric is matched by following weight Into：BaTiO370-81%, SrTiO34-17%, CoNb2O63-8%, Bi2(SnO3)31-5%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
It is preferred that above-mentioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6It is using conventional chemical raw material respectively With Solid phase synthesis.
Above-mentioned BaTiO3It can be prepared using following technique：By 1:1 mol ratio is equipped with BaCO3And TiO2, then to BaCO3 And TiO2It is ground and is well mixed, then by BaCO3And TiO2Mixed material be put into alumina crucible, at 1250 DEG C Insulation 120 minutes, obtains BaTiO3.Obtained BaTiO3After cooling, ground and 200 mesh sieves excessively are standby.
Above-mentioned SrTiO3It can be prepared using following technique：By 1:1 mol ratio is equipped with SrCO3And TiO2, then to SrCO3 And TiO2It is ground and is well mixed, then by SrCO3And TiO2Mixed material be put into alumina crucible, at 1260 DEG C Insulation 120 minutes, obtains SrTiO3.Obtained SrTiO3After cooling, ground and 200 mesh sieves excessively are standby.
Above-mentioned CoNb2O6It can be prepared using following technique：By 1:1 mol ratio is equipped with CoCO3And Nb2O5, then to CoCO3 And Nb2O5It is ground and is well mixed, then by CoCO3And Nb2O5Mixed material be put into alumina crucible, in 1250- 120 minutes are incubated at 1280 DEG C, CoNb is obtained2O6.Obtained CoNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Above-mentioned Bi2(SnO3)3It can be prepared using following technique：By 1：3 mol ratio is equipped with Bi2O3And SnO2, it is then right Bi2O3And SnO2It is ground and is well mixed, then by Bi2O3And SnO2Mixed material be put into alumina crucible, in 1160- 120 minutes are incubated at 1180 DEG C, Bi is obtained2(SnO3)3.Obtained Bi2(SnO3)3After cooling, ground and 200 mesh sieves excessively are standby With.
Above-mentioned MnNb2O6It can be prepared using following technique：By 1:1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3 And Nb2O5It is ground and is well mixed, then by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 1150- 1200 DEG C are incubated 120 minutes, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
The present invention also provides a kind of preparation method of above-mentioned high pressure low-loss ceramic capacitor dielectric, it is characterised in that including Following step：
（1）BaTiO is equipped with proportion3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2；
（2）By step（1）Provisioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2Crush simultaneously It is well mixed, obtain mixed powder；
（3）To step（2）Obtained mixed powder is dried, and obtains dry mash；
（4）Binding agent is added into dry mash and is granulated, granular material is obtained；
（5）By step（4）Obtained granular material is pressed into green sheet；
（6）Green sheet is placed at 1250-1270 DEG C and is incubated 1-4 hours, green sheet is discharged binding agent and is sintered, obtains described High pressure low-loss ceramic capacitor dielectric.
Obtained high pressure low-loss ceramic capacitor dielectric is potsherd, is incubated and is burnt at 780-870 DEG C for 15 minutes Silver, forms silver electrode, then solder taul, is encapsulated, produce ceramic capacitor.
Step（2）In, it is well mixed after can various raw materials be crushed respectively；Carried out after can also various raw materials be mixed Crush, crush side mixing with back, or be again well mixed various raw materials after crushing.Disintegrating apparatus can use ball milling, can also Using other disintegrating apparatus.It is preferred to use planetary ball mill to carrying out ball milling with the raw material got ready, by the raw material of ball milling, used Ball, the part by weight of water used are：Raw material:Ball:Water=1:3:(0.6-1.0), mechanical milling process continues 4-8 hours.Water can be using steaming Distilled water or deionized water.
Step（4）Binding agent can use polyvinyl alcohol water solution（That is PVA solution）.Preferred steps（4）Binding agent adopt With the poly-vinyl alcohol solution that weight percent concentration is 10%, the weight of the poly-vinyl alcohol solution added is the weight of dry mash 8-10%.
Step（4）In, 40 mesh sieves can be crossed after the pelletizing.
Preferred steps（5）In, it is dry-pressing formed to granular material progress under 20-30Mpa pressure, obtain green sheet.
The present invention compared with prior art, has the following advantages that：
（1）The dielectric constant of the ceramic capacitor dielectric of the present invention is high（Dielectric constant is more than 6000）, proof voltage height（Direct current is resistance to Voltage is up to more than 19kV/mm, and ac voltage withstanding is up to more than 12kV/mm）, dielectric loss is small（Dielectric loss is less than 0.3%）；By It is high in dielectric constant, thus miniaturization and the Large Copacity of ceramic capacitor can be realized, it can equally reduce cost.
（2）The percentage of capacitance variation with temperature of the ceramic capacitor dielectric of the present invention is small, meets the requirement of Y5U characteristics；While by It is small in dielectric loss, therefore stability is good in use, it is safe, and the application model of ceramic capacitor can be expanded Enclose.
（3）The ceramic capacitor dielectric of the present invention can intermediate sintering temperature（1250-1270℃）, can so substantially reduce high pressure pottery The cost of porcelain condenser.
（4）The present invention ceramic capacitor dielectric component in not leaded and cadmium, during preparation and use to environment without Pollution.
The ceramic capacitor dielectric of the present invention is suitable for preparing monolithic ceramic capacitor and multiple-layer sheet ceramic capacitor, energy The cost of ceramic capacitor is substantially reduced, while proof voltage can be improved to expand the application of ceramic capacitor.
Embodiment
Embodiment 1
First, with Solid phase synthesis BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6。
BaTiO3Prepared using following technique：By 1:1 mol ratio is equipped with BaCO3And TiO2, then to BaCO3And TiO2Enter Row, which is ground, to be simultaneously well mixed, then by BaCO3And TiO2Mixed material be put into alumina crucible, at 1250 DEG C be incubated 120 points Clock, obtains BaTiO3.Obtained BaTiO3After cooling, ground and 200 mesh sieves excessively are standby.
SrTiO3Prepared using following technique：By 1:1 mol ratio is equipped with SrCO3And TiO2, then to SrCO3And TiO2Enter Row, which is ground, to be simultaneously well mixed, then by SrCO3And TiO2Mixed material be put into alumina crucible, at 1260 DEG C be incubated 120 points Clock, obtains SrTiO3.Obtained SrTiO3After cooling, ground and 200 mesh sieves excessively are standby.
CoNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with CoCO3And Nb2O5, then to CoCO3And Nb2O5 It is ground and is well mixed, then by CoCO3And Nb2O5Mixed material be put into alumina crucible, at 1270 DEG C be incubated 120 minutes, obtain CoNb2O6.Obtained CoNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Bi2(SnO3)3Prepared using following technique：By 1：3 mol ratio is equipped with Bi2O3And SnO2, then to Bi2O3With SnO2It is ground and is well mixed, then by Bi2O3And SnO2Mixed material be put into alumina crucible, at 1170 DEG C protect Temperature 120 minutes, obtains Bi2(SnO3)3.Obtained Bi2(SnO3)3After cooling, ground and 200 mesh sieves excessively are standby.
MnNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed, then by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 1180 DEG C be incubated 120 Minute, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high pressure low-loss ceramic capacitor dielectric：
（1）BaTiO is equipped with proportion3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2；
Reference table 1, the percentage by weight of the various raw materials of outfit is as follows： BaTiO381%, SrTiO36%, CoNb2O65%, Bi2(SnO3)37%, MnNb2O60.3%, ZnO 0.3%, MnO20.4%；
（2）By step（1）Provisioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2Crush simultaneously It is well mixed, obtain mixed powder；
This step（2）In, using planetary ball mill to carrying out ball milling with the raw material got ready, by the raw material of ball milling, balls, used The part by weight of water is：Raw material:Ball:Water=1:3:0.8, mechanical milling process continues 6 hours；
（3）To step（2）Obtained mixed powder is dried, and obtains dry mash；
（4）Binding agent is added into dry mash and is granulated（40 mesh sieves are crossed after the pelletizing）, obtain granular material；
This step（4）Binding agent use weight percent concentration for 10% poly-vinyl alcohol solution, the polyvinyl alcohol added is molten The weight of liquid is the 9% of the weight of dry mash；
（5）By step（4）Obtained granular material is pressed into green sheet；
This step（5）In, it is dry-pressing formed to granular material progress under 25Mpa pressure, obtain green sheet；
（6）Green sheet is placed at 1260 DEG C and is incubated 3 hours, green sheet is discharged binding agent and is sintered, obtains the height and force down Ceramic capacitor dielectric is lost.
Obtained high pressure low-loss ceramic capacitor dielectric is potsherd, and being incubated 15 minutes at 820 DEG C carries out silver ink firing, shape Into silver electrode, then solder taul, encapsulated, produce ceramic capacitor.
Embodiment 2
First, with Solid phase synthesis BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6。
BaTiO in the present embodiment3、SrTiO3Preparation technology it is same as Example 1.
CoNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with CoCO3And Nb2O5, then to CoCO3And Nb2O5 It is ground and is well mixed, then by CoCO3And Nb2O5Mixed material be put into alumina crucible, at 1250 DEG C be incubated 120 minutes, obtain CoNb2O6.Obtained CoNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Bi2(SnO3)3Prepared using following technique：By 1：3 mol ratio is equipped with Bi2O3And SnO2, then to Bi2O3With SnO2It is ground and is well mixed, then by Bi2O3And SnO2Mixed material be put into alumina crucible, at 1160 DEG C protect Temperature 120 minutes, obtains Bi2(SnO3)3.Obtained Bi2(SnO3)3After cooling, ground and 200 mesh sieves excessively are standby.
MnNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed, then by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 1150 DEG C be incubated 120 Minute, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high pressure low-loss ceramic capacitor dielectric：
（1）BaTiO is equipped with proportion3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2；
Reference table 1, the percentage by weight of the various raw materials of outfit is as follows： BaTiO383%, SrTiO38%, CoNb2O66%, Bi2(SnO3)32%, MnNb2O60.3%, ZnO 0.5%, MnO20.2%；
（2）By step（1）Provisioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2Crush simultaneously It is well mixed, obtain mixed powder；
This step（2）In, using planetary ball mill to carrying out ball milling with the raw material got ready, by the raw material of ball milling, balls, used The part by weight of water is：Raw material:Ball:Water=1:3:1.0, mechanical milling process continues 4 hours；
（3）To step（2）Obtained mixed powder is dried, and obtains dry mash；
（4）Binding agent is added into dry mash and is granulated（40 mesh sieves are crossed after the pelletizing）, obtain granular material；
This step（4）Binding agent use weight percent concentration for 10% poly-vinyl alcohol solution, the polyvinyl alcohol added is molten The weight of liquid is the 8% of the weight of dry mash；
（5）By step（4）Obtained granular material is pressed into green sheet；
This step（5）In, it is dry-pressing formed to granular material progress under 20Mpa pressure, obtain green sheet；
（6）Green sheet is placed at 1250 DEG C and is incubated 4 hours, green sheet is discharged binding agent and is sintered, obtains the height and force down Ceramic capacitor dielectric is lost.
Obtained high pressure low-loss ceramic capacitor dielectric is potsherd, and being incubated 15 minutes at 780 DEG C carries out silver ink firing, shape Into silver electrode, then solder taul, encapsulated, produce ceramic capacitor.
Embodiment 3
First, with Solid phase synthesis BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6。
BaTiO in the present embodiment3, SrTiO preparation technology it is same as Example 1.
CoNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with CoCO3And Nb2O5, then to CoCO3And Nb2O5 It is ground and is well mixed, then by CoCO3And Nb2O5Mixed material be put into alumina crucible, at 1280 DEG C be incubated 120 minutes, obtain CoNb2O6.Obtained CoNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Bi2(SnO3)3Prepared using following technique：By 1：3 mol ratio is equipped with Bi2O3And SnO2, then to Bi2O3With SnO2It is ground and is well mixed, then by Bi2O3And SnO2Mixed material be put into alumina crucible, at 1180 DEG C protect Temperature 120 minutes, obtains Bi2(SnO3)3.Obtained Bi2(SnO3)3After cooling, ground and 200 mesh sieves excessively are standby.
MnNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5 It is ground and is well mixed, then by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 1200 DEG C be incubated 120 Minute, obtain MnNb2O6.Obtained MnNb2O6After cooling, ground and 200 mesh sieves excessively are standby.
Then, it is prepared according to the following steps high pressure low-loss ceramic capacitor dielectric：
（1）BaTiO is equipped with proportion3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2；
Reference table 1, the percentage by weight of the various raw materials of outfit is as follows： BaTiO355-90%, SrTiO32-25%, CoNb2O6 2-15%, Bi2(SnO3)30.05-10%, MnNb2O60.03-1.0%, ZnO 0.1-1.5%, MnO20.03-1.0%；
（2）By step（1）Provisioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2Crush simultaneously It is well mixed, obtain mixed powder；
This step（2）In, using planetary ball mill to carrying out ball milling with the raw material got ready, by the raw material of ball milling, balls, used The part by weight of water is：Raw material:Ball:Water=1:3:0.6, mechanical milling process continues 8 hours；
（3）To step（2）Obtained mixed powder is dried, and obtains dry mash；
（4）Binding agent is added into dry mash and is granulated（40 mesh sieves are crossed after the pelletizing）, obtain granular material；
This step（4）Binding agent use weight percent concentration for 10% poly-vinyl alcohol solution, the polyvinyl alcohol added is molten The weight of liquid is the 10% of the weight of dry mash；
（5）By step（4）Obtained granular material is pressed into green sheet；
This step（5）In, it is dry-pressing formed to granular material progress under 30Mpa pressure, obtain green sheet；
（6）Green sheet is placed at 1270 DEG C and is incubated 2 hours, green sheet is discharged binding agent and is sintered, obtains the height and force down Ceramic capacitor dielectric is lost.
Obtained high pressure low-loss ceramic capacitor dielectric is potsherd, and being incubated 15 minutes at 870 DEG C carries out silver ink firing, shape Into silver electrode, then solder taul, encapsulated, produce ceramic capacitor.
Embodiment 4-9
In embodiment 4-9, the proportioning of various raw materials is as shown in table 1.High pressure low-loss ceramic capacitor is prepared in embodiment 4,7 to be situated between The method of matter is same as Example 1（The process conditions such as the temperature of each step, time, pressure can be adjusted according to actual conditions It is whole）；The method that high pressure low-loss ceramic capacitor dielectric is prepared in embodiment 5,8 is same as Example 3（Can be according to actual conditions The process conditions such as the temperature of each step, time, pressure are adjusted）；High pressure low-loss ceramic condenser is prepared in embodiment 6,9 The method of device medium is same as Example 2（The process conditions such as the temperature of each step, time, pressure can be entered according to actual conditions Row adjustment）.
Various embodiments above is made after ceramic capacitor, tests its performance, the performance such as table 2 of each embodiment ceramic capacitor dielectric It is shown.From table 2 it can be seen that prepared ceramic capacitor dielectric proof voltage is high, direct current proof voltage up to more than 19kV/mm, Ac voltage withstanding is up to more than 12kV/mm；Dielectric constant is more than 6000；Dielectric loss is less than 0.3%；Percentage of capacitance variation with temperature is small, Meet the requirement of Y5U characteristics.
The raw material proportioning of the various embodiments of the present invention of table 1（Percentage by weight）
Embodiment BaTiO3 SrTiO3 CoNb2O6 Bi2(SnO3)3 MnNb2O6 ZnO MnO2
1 81 6 5 7 0.3 0.3 0.4
2 83 8 6 2 0.3 0.5 0.2
3 86 4 4 5 0.4 0.4 0.2
4 81 5 6.5 6 0.5 0.4 0.6
5 78 10 6 5 0.4 0.3 0.3
6 75 11 9 4 0.2 0.6 0.2
7 74 13 5 7 0.4 0.4 0.2
8 72 14 7 6 0.3 0.3 0.4
9 70 11 9 8 0.5 0.7 0.8
The performance of ceramic capacitor dielectric made from the various embodiments of the present invention of table 2

Claims (10)

1. a kind of high pressure low-loss ceramic capacitor dielectric, it is characterised in that the raw material matched by following weight is made： BaTiO3 55-90%, SrTiO32-25%, CoNb2O62-15%, Bi2(SnO3)30.05-10%, MnNb2O6 0.03-1.0%, ZnO 0.1-1.5%, MnO2 0.03-1.0%。
2. high pressure low-loss ceramic capacitor dielectric according to claim 1, it is characterised in that the high pressure low-loss pottery The raw material that porcelain condenser medium is matched by following weight is made：BaTiO360-86%, SrTiO33-22%, CoNb2O63-12%, Bi2(SnO3)30.5-8%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
3. high pressure low-loss ceramic capacitor dielectric according to claim 1, it is characterised in that the high pressure low-loss pottery The raw material that porcelain condenser medium is matched by following weight is made：BaTiO365-83%, SrTiO33-19%, CoNb2O64-10%, Bi2(SnO3)31-6%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
4. high pressure low-loss ceramic capacitor dielectric according to claim 1, it is characterised in that the high pressure low-loss pottery The raw material that porcelain condenser medium is matched by following weight is made：BaTiO370-81%, SrTiO34-17%, CoNb2O63-8%, Bi2(SnO3)31-5%, MnNb2O60.2-0.6%, ZnO 0.2-0.7%, MnO2 0.03-1.0%。
5. the high pressure low-loss ceramic capacitor dielectric according to claim any one of 1-4, it is characterised in that the BaTiO3 Prepared using following technique：By 1:1 mol ratio is equipped with BaCO3And TiO2, then to BaCO3And TiO2It is ground and mixes Uniformly, then by BaCO3And TiO2Mixed material be put into alumina crucible, at 1250 DEG C be incubated 120 minutes, obtain BaTiO3。
6. the high pressure low-loss ceramic capacitor dielectric according to claim any one of 1-4, it is characterised in that the SrTiO3 Prepared using following technique：By 1:1 mol ratio is equipped with SrCO3And TiO2, then to SrCO3And TiO2It is ground and mixes Uniformly, then by SrCO3And TiO2Mixed material be put into alumina crucible, at 1260 DEG C be incubated 120 minutes, obtain SrTiO3。
7. the high pressure low-loss ceramic capacitor dielectric according to claim any one of 1-4, it is characterised in that described CoNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with CoCO3And Nb2O5, then to CoCO3And Nb2O5It is ground And be well mixed, then by CoCO3And Nb2O5Mixed material be put into alumina crucible, at 1250-1280 DEG C be incubated 120 points Clock, obtains CoNb2O6。
8. the high pressure low-loss ceramic capacitor dielectric according to claim any one of 1-4, it is characterised in that the Bi2 (SnO3)3Prepared using following technique：By 1：3 mol ratio is equipped with Bi2O3And SnO2, then to Bi2O3And SnO2It is ground simultaneously It is well mixed, then by Bi2O3And SnO2Mixed material be put into alumina crucible, at 1160-1180 DEG C be incubated 120 minutes, Obtain Bi2(SnO3)3。
9. the high pressure low-loss ceramic capacitor dielectric according to claim any one of 1-4, it is characterised in that described MnNb2O6Prepared using following technique：By 1:1 mol ratio is equipped with MnCO3And Nb2O5, then to MnCO3And Nb2O5It is ground And be well mixed, then by MnCO3And Nb2O5Mixed material be put into alumina crucible, in 1150-1200 DEG C be incubated 120 points Clock, obtains MnNb2O6。
10. the preparation method of the high pressure low-loss ceramic capacitor dielectric described in claim any one of 1-4, it is characterised in that bag Include following step：
（1）BaTiO is equipped with proportion3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2；
（2）By step（1）Provisioned BaTiO3、SrTiO3、CoNb2O6、Bi2(SnO3)3、MnNb2O6, ZnO and MnO2Crush simultaneously It is well mixed, obtain mixed powder；
（3）To step（2）Obtained mixed powder is dried, and obtains dry mash；
（4）Binding agent is added into dry mash and is granulated, granular material is obtained；
（5）By step（4）Obtained granular material is pressed into green sheet；
（6）Green sheet is placed at 1250-1270 DEG C and is incubated 1-4 hours, green sheet is discharged binding agent and is sintered, obtains described High pressure low-loss ceramic capacitor dielectric.
CN201710487075.0A 2017-06-23 2017-06-23 A kind of high pressure low-loss ceramic capacitor dielectric and preparation method thereof Withdrawn CN107285762A (en)

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Application publication date: 20171024