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CN100455539C - A kind of microwave dielectric ceramic and preparation method thereof - Google Patents

A kind of microwave dielectric ceramic and preparation method thereof Download PDF

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CN100455539C
CN100455539C CNB2006100408919A CN200610040891A CN100455539C CN 100455539 C CN100455539 C CN 100455539C CN B2006100408919 A CNB2006100408919 A CN B2006100408919A CN 200610040891 A CN200610040891 A CN 200610040891A CN 100455539 C CN100455539 C CN 100455539C
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CN1887793A (en
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张其土
张校平
李斌
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Nanjing Tech University
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Abstract

本发明涉及移动通信用介质天线、滤波器及模块等射频元器件的微波介质陶瓷及制备方法，尤其涉及一种钡铱钛系微波介质陶瓷及其制备方法。其技术方案为：将原料BaCO3，Y2O3，TiO2按比例称好，经球磨、烘干、预烧、再球磨、造粒，过筛，压制成型并烧结得BaO-Y2O3-TiO2系微波介质陶瓷；本发明BaO-Y2O3-TiO2系微波介质陶瓷具有介电性能好、固有烧结温度较低、对环境无污染、价格低等优点，本发明还有利于提高稀土资源的综合利用效率，减缓Y2O3稀土氧化物的相对过剩。The invention relates to microwave dielectric ceramics of radio frequency components such as dielectric antennas, filters and modules for mobile communication and a preparation method thereof, in particular to a barium iridium titanium series microwave dielectric ceramics and a preparation method thereof. Its technical plan is: weigh the raw materials BaCO 3 , Y 2 O 3 , and TiO 2 in proportion, ball mill, dry, calcinate, ball mill again, granulate, sieve, press and sinter to obtain BaO-Y 2 O 3 -TiO 2 series microwave dielectric ceramics; the BaO-Y 2 O 3 -TiO 2 series microwave dielectric ceramics of the present invention have the advantages of good dielectric properties, low inherent sintering temperature, no pollution to the environment, and low price. The present invention also has the following advantages: It is conducive to improving the comprehensive utilization efficiency of rare earth resources and slowing down the relative excess of Y 2 O 3 rare earth oxides.

Description

A kind of microwave-medium ceramics and preparation method thereof
Technical field
The present invention relates to the microwave-medium ceramics and the preparation method of radio frequency components and parts such as tracking exchage polyrod antenna, wave filter and module; Relate in particular to a kind of serial BaO-Y2O3-TiO2 microwave-medium ceramics and preparation method thereof.
Background technology
Microwave-medium ceramics is widely used in many fields of microwave technology, as mobile telephone, telestar receptor, military radar, wireless remote control etc.Along with mobile communication gets fast development, mobile communication terminal is just towards miniaturization, lightweight, integrated direction development in recent years.The stupalith of low temperature system more and more is subject to people's attention.Study maximum BaO-Sm at present 2O 3-TiO 2System, BaO-Nd 2O 3-TiO 2System waits microwave-medium ceramics ε rBe about 50～80, Qf 〉=4000, but intrinsic sintering temperature is than higher (being about 1340 ℃～1400 ℃), and rare earths materials such as Sm, Nd are relatively more expensive, cause product price higher, are not suitable for popular the popularization.BaO-B 2O 3-SiO 2-TiO 2The system (patent No. CN1559981) though microwave-medium ceramics sintering temperature lower (about 950 ℃), ε rHave only 4～50, be not suitable for the demand for development of microwave technical field.
Summary of the invention
Technical problem to be solved by this invention is in order to overcome the intrinsic sintering temperature of prior art than higher, though or the low ε of sintering temperature rThe shortcoming that value is low and proposed the relatively lower BaO-Y of the relatively good and intrinsic temperature of a kind of dielectric properties 2O 3-TiO 2Series microwave dielectric ceramic; Another object of the present invention has also proposed the preparation method of above-mentioned microwave-medium ceramics.
Technical scheme of the present invention is: it is as follows that a kind of microwave dielectric ceramic materials, its material component and each component account for the molar percentage of raw material total amount:
The material component molar percentage
BaCO 3 10～20％
Y 2O 3 14～33％
TiO 2 57～72％
The present invention also provides the preparation method of above-mentioned microwave dielectric ceramic materials, and its step is as follows:
A, take by weighing raw material in above-mentioned raw materials component ratio; The raw material that weighs up ball milling 16～24 hours on ball mill, oven dry again;
The pre-burning that heats up after B, the raw material stoving is reduced to 18 ℃～25 ℃ with stove then; The pellet of pre-burning was ground 5～8 hours;
C, in the powder that above-mentioned ball milling is crossed, add the PVA binding agent, grind granulation about 1～3 hour then, sieve, and with powder compression moulding;
D, forming composition is heated up, sintering and insulation are reduced to 18 ℃～25 ℃ with stove then.
Wherein ball mill is preferably the roller milling machine in the steps A, adopts wet ball grinding.3～3.5 ℃/min of temperature rise rate among the step B, calcined temperature are 900 ℃～1150 ℃, and the pre-burning time is 2h～8h.
The add-on of PVA binding agent is the 7～10wt% that accounts for raw materials quality among the step C.Sieve among the step C with 80 mesh sieve, the general compression moulding of powder is thin rounded flakes.3～3.5 ℃/min of temperature rise rate among the step D, sintering temperature is 1220～1280 ℃, soaking time 2h～8h.
Beneficial effect:
1. BaO-Y of the present invention 2O 3-TiO 2Series microwave dielectric ceramic dielectric properties (ε rBe about 50～84, Qf 〉=4000) suitable with other prescription series, but intrinsic sintering temperature lower (1220 ℃～1280 ℃) greatly reduces energy consumption, is fit to low sintering research, helps the development and the application of new low temperature system microwave-medium ceramics.
2. compliance with environmental protection requirements of the present invention, nontoxicity, environmentally safe, and Y 2O 3Price is more cheap with respect to the rare earth of other system, and marketable value is arranged.
3. the present invention helps improving the comprehensive utilization ratio of rare earth resources, slows down Y 2O 3The surplus relatively of rare earth oxide.
Embodiment
The invention will be further described below in conjunction with embodiment, but should not limit protection scope of the present invention with this.
The composition of 9 specific embodiments of serial BaO-Y2O3-TiO2 microwave dielectric ceramic materials of the present invention is as shown in table 1:
Table 1
Figure C20061004089100041
Embodiment 1 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1150 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1280 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=79, Qf=4083, τ f=-28ppm/ ℃
Embodiment 2 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 900 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1270 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=50, Qf=4333, τ f=-15ppm/ ℃
Embodiment 3 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1000 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1240 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=80, Qf=5500, τ f=11ppm/ ℃
Embodiment 4 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1050 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1240 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=58, Qf=8300, τ f=9ppm/ ℃
Embodiment 5 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1100 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1250 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=65, Qf=8520, τ f=10ppm/ ℃
Embodiment 6 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1100 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 1 hour in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1240 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=57, Qf=7200, τ f=9ppm/ ℃
Embodiment 7 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1050 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 2 hours in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1280 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=60, Qf=5000, τ f=50ppm/ ℃
Embodiment 8 #:
Composition is shown in 1# in the table 1, and concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1150 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 3 hours in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1220 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=78, Qf=5250, τ f=22ppm/ ℃
Embodiment 9 #:
Form as in the table 11 #Shown in, concrete preparation method comprises the following steps:
1. calculate the weight percent of raw material by the molar percentage (mol%) of the composition of selecting raw material, take by weighing raw material then.
2. the sample that weighs up is placed ball grinder, wet ball grinding 24 hours.
3. after the raw material stoving in 1150 ℃, air atmosphere pre-burning 2h, 3.5 ℃/min of temperature rise rate lowers the temperature with stove then.
4. with the material of pre-burning, wet ball grinding 6 hours (300 rev/mins) on planetary mills.
5. the ratio adding concentration in 7wt% is the PVA binding agent of 7wt%, grinds granulation in about 3 hours in agate mortar, crosses 80 mesh sieves.
6. the powder that will be mixed with 7wt%PVA with powder compressing machine is pressed into thick one by one about 3mm, and the thin discs of diameter 13mm, pressure are about 100MPa.
7. with disk at 1260 ℃, sintering in the air atmosphere, 3 ℃/min of temperature rise rate, soaking time 2h lowers the temperature with stove then.
Test result to this microwave dielectric ceramic materials is as follows:
With the sample surfaces polishing, adopt Agilient 8722ET network analyzer, measure DIELECTRIC CONSTANT according to the Hakki-Coleman method rAnd quality factor q.Temperature coefficient of resonance frequency is according to formula τ f = f 2 - f 1 f 1 ( T 2 - T 1 ) Calculate.Dielectric properties are as follows: ε r=62, Qf=7142, τ f=16ppm/ ℃

Claims (7)

1、一种微波介质陶瓷材料，其原料组成及各组份占原料总量的摩尔百分比如下：1. A microwave dielectric ceramic material, the composition of its raw materials and the molar percentage of each component in the total amount of raw materials are as follows: 原料组份                摩尔百分比Raw material composition Mole percent BaCO3                   10～20％BaCO 3 10～20% Y2O3                    14～33％Y 2 O 3 14～33% TiO2                    57～72％。TiO 2 57-72%. 2、一种如权利要求1所述的微波介质陶瓷材料的制备方法，其步骤如下：2. A method for preparing a microwave dielectric ceramic material as claimed in claim 1, the steps of which are as follows: A、按权利要求1的比例称取原料；称好的原料在球磨机上球磨16～24小时，再烘干；A, take the raw material according to the ratio of claim 1; The weighed raw material is ball milled on a ball mill for 16 to 24 hours, and then dried; B、原料烘干后升温预烧，然后随炉降至18℃～25℃；将预烧过的料球磨5～8小时；B. After the raw materials are dried, the temperature is raised for pre-burning, and then the temperature is lowered to 18 ℃ to 25 ℃ with the furnace; the pre-burned materials are ball milled for 5 to 8 hours; C、在上述球磨过的粉料中加入PVA粘结剂，然后研磨1～3小时造粒，过筛，并将粉料压制成型；C. Add PVA binder to the ball-milled powder, then grind for 1 to 3 hours to granulate, sieve, and press the powder into shape; D、将成型物升温，烧结并保温，然后随炉降至18℃～25℃。D. Raise the temperature of the molding, sinter and keep it warm, and then lower it to 18°C to 25°C with the furnace. 3、根据权利要求2所述的制备方法，其特征在于步骤A中球磨机为滚筒式球磨机，采用湿法球磨。3. The preparation method according to claim 2, characterized in that the ball mill in step A is a drum-type ball mill, and wet ball milling is adopted. 4、根据权利要求2所述的制备方法，其特征在于步骤B中升温速率3～3.5℃/min，预烧温度为900℃～1150℃，预烧时间为2h～8h。4. The preparation method according to claim 2, characterized in that in step B, the heating rate is 3-3.5°C/min, the pre-calcination temperature is 900°C-1150°C, and the pre-calcination time is 2h-8h. 5、根据权利要求2所述的制备方法，其特征在于步骤C中PVA粘结剂的加入量为占原料质量的7～10wt％。5. The preparation method according to claim 2, characterized in that the amount of PVA binder added in step C is 7-10 wt% of the raw material mass. 6、根据权利要求2所述的制备方法，其特征在于步骤C中过筛用80目筛子，粉料压制成型为圆形薄片。6. The preparation method according to claim 2, characterized in that in step C, the powder is sieved with an 80-mesh sieve, and the powder is pressed into circular flakes. 7、根据权利要求2所述的制备方法，其特征在于步骤D中升温速率3～3.5℃/min，烧结温度为1220～1280℃，保温时间2h～8h。7. The preparation method according to claim 2, characterized in that in step D, the heating rate is 3-3.5°C/min, the sintering temperature is 1220-1280°C, and the holding time is 2h-8h.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1136026A (en) * 1996-05-07 1996-11-20 浙江大学 HF dielectric ceramics and its manufacture
CN1212439A (en) * 1997-09-25 1999-03-31 株式会社村田制作所 Dielectric ceramic composition and monolithic multilayer ceramic capacitor using same
CN1244514A (en) * 1998-08-11 2000-02-16 株式会社村田制作所 Dielectric ceramic composition and laminated ceramic capacitor with said composition
CN1247843A (en) * 1998-09-11 2000-03-22 株式会社村田制作所 Dielectric ceramic composition and laminated ceramic element
CN1360320A (en) * 2000-12-19 2002-07-24 株式会社村田制作所 Synthetic multi-layer ceramic electronic component and mfg. method thereof
CN1445792A (en) * 2002-03-15 2003-10-01 株式会社村田制作所 Dielectric ceramic composite and its making method, and laminated capacitor
CN1208783C (en) * 2000-07-21 2005-06-29 株式会社村田制作所 Dielectric ceramic composition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1136026A (en) * 1996-05-07 1996-11-20 浙江大学 HF dielectric ceramics and its manufacture
CN1212439A (en) * 1997-09-25 1999-03-31 株式会社村田制作所 Dielectric ceramic composition and monolithic multilayer ceramic capacitor using same
CN1244514A (en) * 1998-08-11 2000-02-16 株式会社村田制作所 Dielectric ceramic composition and laminated ceramic capacitor with said composition
CN1247843A (en) * 1998-09-11 2000-03-22 株式会社村田制作所 Dielectric ceramic composition and laminated ceramic element
CN1208783C (en) * 2000-07-21 2005-06-29 株式会社村田制作所 Dielectric ceramic composition
CN1360320A (en) * 2000-12-19 2002-07-24 株式会社村田制作所 Synthetic multi-layer ceramic electronic component and mfg. method thereof
CN1445792A (en) * 2002-03-15 2003-10-01 株式会社村田制作所 Dielectric ceramic composite and its making method, and laminated capacitor

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