JPH04325454A - Dielectric porcelain composition - Google Patents
Dielectric porcelain compositionInfo
- Publication number
- JPH04325454A JPH04325454A JP3097068A JP9706891A JPH04325454A JP H04325454 A JPH04325454 A JP H04325454A JP 3097068 A JP3097068 A JP 3097068A JP 9706891 A JP9706891 A JP 9706891A JP H04325454 A JPH04325454 A JP H04325454A
- Authority
- JP
- Japan
- Prior art keywords
- composition
- dielectric
- temperature
- dielectric constant
- porcelain composition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 23
- 229910052573 porcelain Inorganic materials 0.000 title abstract description 5
- 229910019653 Mg1/3Nb2/3 Inorganic materials 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 9
- 235000019169 all-trans-retinol Nutrition 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 10
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000003989 dielectric material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- ZKATWMILCYLAPD-UHFFFAOYSA-N niobium pentoxide Chemical compound O=[Nb](=O)O[Nb](=O)=O ZKATWMILCYLAPD-UHFFFAOYSA-N 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000010216 calcium carbonate Nutrition 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten(VI) oxide Inorganic materials O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Inorganic Insulating Materials (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、低温焼成が可能であり
、かつ大きな比誘電率を持ち、誘電率の温度変化率が小
さく、マイクロ波域での無負荷Ｑが大きい誘電体磁器組
成物である。[Industrial Application Field] The present invention provides a dielectric ceramic composition that can be fired at a low temperature, has a large relative dielectric constant, has a small rate of change in dielectric constant with temperature, and has a large no-load Q in the microwave range. It is.
【０００２】0002
【従来の技術】近年、マイクロ波帯域の電波を利用した
自動車電話可搬型電話などの移動体通信機、あるいは衛
星放送などの進展にともない機器の小型化が要求されて
いる。このためには、機器を構成する個々の部品が小型
化される必要があり、その手段の一つに、帯域通過フィ
ルターとして誘電体材料を使ったＬＣフィルターが提案
されている。2. Description of the Related Art In recent years, with the development of mobile communication devices such as portable car telephones that utilize radio waves in the microwave band, and satellite broadcasting, there has been a demand for smaller devices. For this purpose, it is necessary to downsize the individual components that make up the device, and one of the means for achieving this is an LC filter using a dielectric material as a bandpass filter.
【０００３】小型のＬＣフィルターを作製するには、高
い誘電率を有する材料が必要である。また、それ以外に
もマイクロ波域での無負荷Ｑが大きいこと、誘電率の温
度変化率が小さいこと、使用する電極材料の選択や同時
焼成のために焼成温度が低いことが要求されている。[0003] To make small LC filters, materials with high dielectric constants are required. In addition, other requirements include a large no-load Q in the microwave range, a small rate of change in dielectric constant with temperature, and a low firing temperature for selection of electrode materials and simultaneous firing. .
【０００４】従来、マイクロ波域で利用されてきた誘電
体材料には、Ｂａ（Ｍｇ１／３Ｔａ２／３）Ｏ３、Ｂａ
（Ｚｎ１／３Ｔａ１／３）Ｏ３等が知られているが、こ
れらは焼成温度が１３００℃以上と高く、逆に焼成温度
の低いものは誘電率が１０以下と小さく小型のＬＣフィ
ルター材料としては利用できない。
また、焼成温度が低く小さな温度変化率を持つ材料とし
て（ＰｂｘＣａ１−ｘ）（Ｍｇ１／３Ｎｂ２／３）ｙ（
Ｍｇ１／２Ｗ１／２）１−ｙＯ３が知られているが（特
開昭６３−１１６３０７号公報）、マイクロ波域での特
性は明らかでなかった。Dielectric materials conventionally used in the microwave range include Ba(Mg1/3Ta2/3)O3, Ba
(Zn1/3Ta1/3)O3 etc. are known, but these have a high firing temperature of 1300℃ or higher, whereas those with a low firing temperature have a low dielectric constant of 10 or less and are used as small LC filter materials. Can not. In addition, (PbxCa1-x)(Mg1/3Nb2/3)y(
Although Mg1/2W1/2)1-yO3 is known (Japanese Unexamined Patent Publication No. 116307/1983), its properties in the microwave region were not clear.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、低温焼成が
でき、かつ大きな比誘電率を持ち、温度特性が小さく、
マイクロ波域での無負荷Ｑが大きい誘電体磁器組成物を
提供することを目的とする。[Problems to be Solved by the Invention] The present invention can be fired at a low temperature, has a large dielectric constant, has small temperature characteristics,
It is an object of the present invention to provide a dielectric ceramic composition having a large no-load Q in the microwave region.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
、本発明は一般式が（ＰｂｘＣａ１−ｘ）α（Ｍｇ１／
３Ｎｂ２／３）ｙ（Ｍｇ１／２Ｗ１／２）１−ｙＯ２＋
α で表わされる磁器組成物において、αが、
１≦α≦１．１
の範囲内にあり、かつｘおよびｙが、ｘｙ 平面で表わ
したとき、下記の組成点Ａ，Ｂ，Ｃ，Ｄ，の四点に囲ま
れる領域内の組成物からなることを特徴とする誘電体磁
器組成物である。[Means for Solving the Problems] In order to achieve this object, the present invention provides that the general formula (PbxCa1-x)α(Mg1/
3Nb2/3)y(Mg1/2W1/2)1-yO2+
In the porcelain composition represented by α, when α is within the range of 1≦α≦1.1, and x and y are expressed on the xy plane, the following composition points A, B, C, D, This is a dielectric ceramic composition characterized in that it consists of a composition within a region surrounded by four points.
【０００７】
Ａ：（ｘ＝０．５，ｙ＝１．０） Ｂ：（ｘ＝０
．５，ｙ＝０．２５）
Ｃ：（ｘ＝０．３，ｙ＝０．２５） Ｄ：（ｘ＝０
．３，ｙ＝１．０）但し、ＡＤを結ぶ線上の点は除外す
る。A: (x=0.5, y=1.0) B: (x=0
．． 5, y=0.25) C: (x=0.3, y=0.25) D: (x=0
．． 3, y=1.0) However, points on the line connecting AD are excluded.
【０００８】[0008]
【作用】一般式がＰｂ（Ｍｇ１／３Ｎｂ２／３）ｙ（Ｍ
ｇ１／２Ｗ１／２）１−ｙＯ３で表わされる固溶体のＰ
ｂを、一部Ｃａで置換することにより、低温焼成ができ
、かつ比誘電率が大きく、温度特性が小さく、無負荷Ｑ
の大きい特性を持つ誘電体磁器組成物を得ることが出来
る。[Action] The general formula is Pb(Mg1/3Nb2/3)y(M
P of the solid solution represented by g1/2W1/2)1-yO3
By partially replacing b with Ca, low-temperature firing is possible, the dielectric constant is large, the temperature characteristics are small, and the no-load Q
A dielectric ceramic composition having great characteristics can be obtained.
【０００９】[0009]
【実施例】出発原料として、純度がそれぞれ９９．６８
％、９９．００％、９７．７０％、９９．８７％、９９
．３０％、９９．９０％のＰｂＯ，ＣａＣＯ３，ＭｇＯ
，Ｎｂ２Ｏ５，ＷＯ３を用いた。これらを純度補正を行
なった上で所定量を秤量し、安定化ジルコニア製玉石を
用い純水を溶媒としてボールミルで１７時間混合した。
これを吸引ろ過して水分の大半を分離した後乾燥し、ア
ルミナるつぼ中に入れ７００〜８００℃で２時間仮焼し
た。次に仮焼物をアルミナ乳鉢で粗砕し、さらに安定化
ジルコニア製玉石を用い純水を溶媒としてボールミルで
１７時間粉砕し、吸引ろ過して水分の大半を分離した後
乾燥した。これをアルミナ乳鉢で粉砕し、その中へバイ
ンダーとしてポリビニルアルコール６ｗｔ％水溶液を粉
体量の６ｗｔ％加え、３２メッシュふるいを通して造粉
し、成形圧力２００ｋｇ／ｃｍ２で、直径１３ｍｍ高さ
約５ｍｍの円柱状に成形した。成形物を空気中で６００
℃まで昇温し２時間保持することによりポリビニルアル
コール分をバーンアウトし、冷却後これをマグネシア磁
器容器に移し、同質の蓋をし、所定の温度まで毎時４０
０℃で昇温し、２時間保持後毎時４００℃で降温した。[Example] Purity of each starting material is 99.68.
%, 99.00%, 97.70%, 99.87%, 99
．． 30%, 99.90% PbO, CaCO3, MgO
, Nb2O5, and WO3 were used. After correcting the purity of these, a predetermined amount was weighed and mixed in a ball mill for 17 hours using stabilized zirconia cobblestones and pure water as a solvent. This was filtered under suction to remove most of the moisture, then dried, placed in an alumina crucible, and calcined at 700 to 800°C for 2 hours. Next, the calcined product was roughly crushed in an alumina mortar, further crushed in a ball mill using stabilized zirconia cobblestones and pure water as a solvent for 17 hours, filtered under suction to remove most of the moisture, and then dried. This was pulverized in an alumina mortar, 6 wt % of the powder was added with a 6 wt % aqueous solution of polyvinyl alcohol as a binder, and the powder was formed through a 32 mesh sieve at a molding pressure of 200 kg/cm2 to form a circle with a diameter of 13 mm and a height of about 5 mm. Shaped into a column. 600 min of molded product in air
℃ and held for 2 hours to burn out the polyvinyl alcohol. After cooling, the container was transferred to a magnesia porcelain container, covered with a similar lid, and heated at 40°C per hour to the specified temperature.
The temperature was raised to 0°C, held for 2 hours, and then lowered to 400°C per hour.
【００１０】得られた焼結体を誘電体共振法による測定
から共振周波数と無負荷Ｑを求め、焼結体の寸法と共振
周波数より比誘電率を算出した。共振周波数は３〜６Ｇ
Ｈｚであった。また、−２５℃〜８５℃の温度範囲で比
誘電率を測定し、２０℃を基準として温度変化率を算出
した。The resonance frequency and no-load Q of the obtained sintered body were determined by measurement using a dielectric resonance method, and the relative dielectric constant was calculated from the dimensions of the sintered body and the resonance frequency. Resonant frequency is 3~6G
It was Hz. Further, the dielectric constant was measured in a temperature range of -25°C to 85°C, and the rate of temperature change was calculated with 20°C as a reference.
【００１１】[0011]
【表１】[Table 1]
【００１２】（表１）に本発明の組成範囲及び周辺組成
の成分、焼成温度、比誘電率、Ｑ、誘電率の温度変化率
を示す。同表において、ｘ，ｙ，αは前記一般式におけ
る係数を示す。また、同表の試料Ｎｏ．の欄に＊印をつ
けたものは発明の範囲外の比較例である。これらは、焼
成温度が１３００℃以上、Ｑ値が３００以下、温度変化
率が１００ｐｐｍ／℃以上か−１００ｐｐｍ／℃以下の
いずれかであり、マイクロ波誘電体として望ましくない
ので請求範囲から除外した。（図１）に本発明の誘電体
磁器組成物の組成範囲を示す。図中の番号は（表１）の
番号に対応する。Table 1 shows the composition range of the present invention, the components of the surrounding composition, the firing temperature, the relative dielectric constant, Q, and the temperature change rate of the dielectric constant. In the same table, x, y, and α represent coefficients in the above general formula. Also, sample No. in the same table. Items marked * in the column are comparative examples outside the scope of the invention. These have a firing temperature of 1300° C. or more, a Q value of 300 or less, and a temperature change rate of 100 ppm/° C. or more or -100 ppm/° C. or less, and are not desirable as microwave dielectrics, so they are excluded from the scope of claims. (FIG. 1) shows the composition range of the dielectric ceramic composition of the present invention. The numbers in the figure correspond to the numbers in (Table 1).
【００１３】[0013]
【発明の効果】本発明の誘電体磁器組成物によれば、比
誘電率が２５以上、マイクロ波域での無負荷Ｑが３００
以上、誘電率の温度変化率が−１００〜１００ｐｐｍ／
℃の特性が得られ、さらに１２５０℃以下で焼成できる
ので、焼成工程におけるコストダウンや電極材料の選択
の幅が大きくなってくる。また、この誘電体磁器組成物
を窒素中で焼成しても誘電特性に大きな影響を与えなか
ったことから、焼成温度が１０８０℃以下の組成は電極
として銅を使うことも可能であり、工業的価値は大であ
る。Effects of the Invention According to the dielectric ceramic composition of the present invention, the dielectric constant is 25 or more, and the no-load Q in the microwave region is 300.
Above, the temperature change rate of dielectric constant is -100 to 100 ppm/
℃ characteristics, and can be fired at temperatures below 1250°C, reducing costs in the firing process and increasing the range of electrode material selection. In addition, firing this dielectric ceramic composition in nitrogen did not significantly affect the dielectric properties, so it is possible to use copper as an electrode for compositions with a firing temperature of 1080°C or less, making it suitable for industrial use. The value is great.
Claims (1)
Ｍｇ１／３Ｎｂ２／３）ｙ（Ｍｇ１／２Ｗ１／２）１−
ｙＯ２＋α で表わされる磁器組成物において、αが、 １≦α≦１．１ の範囲内にあり、かつｘおよびｙが、ｘｙ 平面で表わ
したとき、下記の組成点Ａ，Ｂ，Ｃ，Ｄの四点に囲まれ
る領域内の組成物からなることを特徴とする誘電体磁器
組成物。 Ａ：（ｘ＝０．５，ｙ＝１．０） Ｂ：（ｘ＝０
．５，ｙ＝０．２５） Ｃ：（ｘ＝０．３，ｙ＝０．２５） Ｄ：（ｘ＝０
．３，ｙ＝１．０）但し、ＡＤを結ぶ線上の点は除外す
る。Claim 1: General formula (PbxCa1-x)α(
Mg1/3Nb2/3)y(Mg1/2W1/2)1-
In the ceramic composition represented by yO2+α, when α is within the range of 1≦α≦1.1 and x and y are expressed on the xy plane, the following composition points A, B, C, and D are satisfied. A dielectric ceramic composition comprising a composition within a region surrounded by four points. A: (x=0.5, y=1.0) B: (x=0
．． 5, y=0.25) C: (x=0.3, y=0.25) D: (x=0
．． 3, y=1.0) However, points on the line connecting AD are excluded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3097068A JPH04325454A (en) | 1991-04-26 | 1991-04-26 | Dielectric porcelain composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3097068A JPH04325454A (en) | 1991-04-26 | 1991-04-26 | Dielectric porcelain composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04325454A true JPH04325454A (en) | 1992-11-13 |
Family
ID=14182328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3097068A Pending JPH04325454A (en) | 1991-04-26 | 1991-04-26 | Dielectric porcelain composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04325454A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565391A (en) * | 1993-05-20 | 1996-10-15 | Tdk Corporation | Dielectric ceramic material and method for making |
| US6087286A (en) * | 1996-12-16 | 2000-07-11 | Tdk Corporation | Dielectric ceramic composition, dielectric ceramic material and its production method, dielectric device and its production method |
-
1991
- 1991-04-26 JP JP3097068A patent/JPH04325454A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5565391A (en) * | 1993-05-20 | 1996-10-15 | Tdk Corporation | Dielectric ceramic material and method for making |
| US6087286A (en) * | 1996-12-16 | 2000-07-11 | Tdk Corporation | Dielectric ceramic composition, dielectric ceramic material and its production method, dielectric device and its production method |
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