JP6536405B2 - フェライト焼結体、フェライト焼結板及びフェライト焼結シート - Google Patents
フェライト焼結体、フェライト焼結板及びフェライト焼結シート Download PDFInfo
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- JP6536405B2 JP6536405B2 JP2015545295A JP2015545295A JP6536405B2 JP 6536405 B2 JP6536405 B2 JP 6536405B2 JP 2015545295 A JP2015545295 A JP 2015545295A JP 2015545295 A JP2015545295 A JP 2015545295A JP 6536405 B2 JP6536405 B2 JP 6536405B2
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- ferrite sintered
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- 229910000859 α-Fe Inorganic materials 0.000 title claims description 165
- 239000000203 mixture Substances 0.000 claims description 26
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 16
- 239000011241 protective layer Substances 0.000 claims description 16
- 239000012790 adhesive layer Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000008859 change Effects 0.000 description 16
- 238000005245 sintering Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 11
- 230000035699 permeability Effects 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000011148 porous material Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 229910017816 Cu—Co Inorganic materials 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000001354 calcination Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910000358 iron sulfate Inorganic materials 0.000 description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- 229910007565 Zn—Cu Inorganic materials 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009702 powder compression Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- IRIAEXORFWYRCZ-UHFFFAOYSA-N Butylbenzyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCC1=CC=CC=C1 IRIAEXORFWYRCZ-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 150000003891 oxalate salts Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Description
<作用>
本発明において最も重要な点は、特定の組成からなるフェライト焼結体、フェライト焼結板又はフェライト焼結シートは、μ′が高く、μ″が低く、更にμ′の温度変化が小さいという事実である。これらにより、アンテナのインダクタンスが大きくなり、その損失が小さくなるので、交信感度を高めることができる。更に、μ′の温度変化が小さいので、屋外での使用において外気温度の変化によるインダクタンスの変化が小さくなり、安定した交信が可能となる。また、本発明のフェライト焼結板は、その密度が高く、緻密な微細構造を有しているので、取り扱いの際に割れにくく、生産性を向上することができる。
フェライトの組成が、所定の組成になるように各酸化物原料を秤量し、ボールミルを用いて20時間湿式混合を行った後、混合スラリーを濾別・乾燥して原料混合粉末を得た。該原料混合粉末を720℃で3時間焼成して得られた仮焼成物をボールミルで粉砕し、本発明に係るNi−Zn−Cu−Coフェライト粉末を得た。なお、Sは原料Fe2O3を製造する際に使用した硫酸鉄に由来するものである。
実施例1と同様の方法で、フェライト焼結板及びフェライト焼結シートを得た。この時の製造条件及び得られたフェライト焼結板及びフェライト焼結シートの緒特性を表1に示す。
実施例1と同様の方法で、フェライト焼結板及びフェライト焼結シートを得た。この時の製造条件及び得られたフェライト焼結板及びフェライト焼結シートの緒特性を表1に示す。フェライト焼結板の微細構造を図2に示す。この図から明らかなように、該フェライト焼結板の微細構造には、多くの空孔が認められた。
実施例1と同様の方法で、フェライト焼結板及びフェライト焼結シートを得た。この時の製造条件及び得られたフェライト焼結板及びフェライト焼結シートの緒特性を表1に示す。
Claims (6)
- 酸化物換算で47.5〜49.8mol%のFe2O3、13.5〜19.5mol%のNiO、21〜27mol%のZnO、7.5〜12.5mol%のCuO、0.2〜0.8mol%のCoOからなる組成を有するフェライト焼結体であって、更に0.2〜1.4wt%のSnO2と0.005〜0.03wt%のSを含有することを特徴とするフェライト焼結体。
- フェライト焼結体がフェライト焼結板である請求項1に記載のフェライト焼結体。
- フェライト焼結板の密度が5.05〜5.30g/cm3である請求項2に記載のフェライト焼結板。
- 請求項2又は3記載のフェライト焼結板の一方の表面に粘着層または保護層を設け、反対側の表面に粘着層または保護層を設けたフェライト焼結シート。
- フェライト焼結板の少なくとも一方の表面に少なくとも1つの溝が形成されている請求項4に記載のフェライト焼結シート。
- フェライト焼結板が小片状に分割されている請求項4に記載のフェライト焼結シート。
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