JP6373311B2 - スパークプラグ - Google Patents
スパークプラグ Download PDFInfo
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- JP6373311B2 JP6373311B2 JP2016156361A JP2016156361A JP6373311B2 JP 6373311 B2 JP6373311 B2 JP 6373311B2 JP 2016156361 A JP2016156361 A JP 2016156361A JP 2016156361 A JP2016156361 A JP 2016156361A JP 6373311 B2 JP6373311 B2 JP 6373311B2
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
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Description
原料粉末として、平均粒径が0.2〜2.1μmのアルミナ(Al2O3)粉末、Si化合物粉末としてSiO2粉末、第2族元素化合物粉末としてBa,Ca,Mgの炭酸塩粉末を準備した。これらの粉末を種々の割合で混合した原料粉末と、バインダーとしてのポリビニルアルコールと、溶媒としての水とを混合して種々のスラリーを調製した。
得られた円板状のアルミナ基焼結体(成分分析用)それぞれの組成、即ち各成分の含有率を蛍光X線分析法により検出した。検出された各成分の酸化物換算の質量の合計を100質量%としたときの質量割合(%)として、各成分の含有率を算出した。その結果、表1に示される各成分の含有率(計算値)は、原料粉末の混合割合とほぼ一致した。
円板状の各アルミナ基焼結体(成分分析用)に研磨処理を施した後、株式会社リガク製のX線回折装置(型式:Smart Lab)を用いて、X線:CuKα(λ1.54Å)、X線出力:40kV−30mA、スキャンスピード(計数時間):5.0、サンプリング幅:0.02deg、入射スリット:1/2deg、受光スリット(1):15.000mm、受光スリット(2):20.000mmの測定条件で、アルミナ基焼結体の断面のX線回折分析をした。
図2に示す耐電圧試験装置20を用いて、サンプルNo.1〜30における有底筒状のアルミナ基焼結体31(耐電圧測定用)の900℃における高温耐電圧試験を行った。図2は耐電圧試験装置20の断面図である。
13 絶縁体
Claims (2)
- アルミナ結晶を含有するアルミナ基焼結体からなる絶縁体を有するスパークプラグであって、
前記アルミナ基焼結体は、酸化物換算で92質量%以上96質量%以下のAl成分と、
IUPAC1990年勧告に基づく周期表の第2族元素から選択される少なくとも3種の元素と、を含有し、且つ、前記少なくとも3種の元素のうちの1種が、酸化物換算で1.90質量%以上のBa成分であり、
前記アルミナ結晶の間に存在する粒界相に、
前記元素のうち少なくとも1種とSiとを含有する第1結晶相と、
前記元素のうち少なくとも1種とAlとを含有する第2結晶相(但し、第2結晶相はSiを含有するもの及び前記元素としてMgのみを含有するものを除く)とを含み、
前記アルミナ基焼結体のX線回折において、前記アルミナ結晶の最大の回折強度に対する、前記第1結晶相の最大の相対強度および前記第2結晶相の最大の相対強度は、いずれも2以上であることを特徴とするスパークプラグ。 - 前記第1結晶相および前記第2結晶相は、前記元素の主成分がBaであることを特徴とする請求項1記載のスパークプラグ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2016156361A JP6373311B2 (ja) | 2016-08-09 | 2016-08-09 | スパークプラグ |
US15/669,536 US10193311B2 (en) | 2016-08-09 | 2017-08-04 | Spark plug |
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JP2016156361A JP6373311B2 (ja) | 2016-08-09 | 2016-08-09 | スパークプラグ |
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JP2018026230A JP2018026230A (ja) | 2018-02-15 |
JP6373311B2 true JP6373311B2 (ja) | 2018-08-15 |
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US11146041B2 (en) * | 2019-07-18 | 2021-10-12 | Ngk Spark Plug Co., Ltd. | Spark plug that has an insulator less likely to be damaged |
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JP4748693B2 (ja) | 1998-11-24 | 2011-08-17 | 日本特殊陶業株式会社 | 高耐電圧性アルミナ基焼結体及びその製造方法 |
JP4827110B2 (ja) | 1999-04-26 | 2011-11-30 | 日本特殊陶業株式会社 | 高耐電圧性アルミナ基焼結体 |
JP4530380B2 (ja) * | 1999-11-29 | 2010-08-25 | 日本特殊陶業株式会社 | スパークプラグ用絶縁体及びそれを備えるスパークプラグ |
JP4544597B2 (ja) | 2000-05-01 | 2010-09-15 | 日本特殊陶業株式会社 | スパークプラグ |
CN101682175B (zh) | 2008-03-27 | 2012-06-27 | 日本特殊陶业株式会社 | 火花塞和制造火花塞的方法 |
JP5600711B2 (ja) * | 2012-08-28 | 2014-10-01 | 日本特殊陶業株式会社 | スパークプラグ |
JP5775544B2 (ja) * | 2013-05-09 | 2015-09-09 | 日本特殊陶業株式会社 | 点火プラグ用絶縁体及び点火プラグ |
JP6052249B2 (ja) * | 2014-07-24 | 2016-12-27 | 株式会社デンソー | アルミナ質焼結体、及びスパークプラグ |
JP6440602B2 (ja) | 2015-09-24 | 2018-12-19 | 日本特殊陶業株式会社 | スパークプラグ |
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JP2018026230A (ja) | 2018-02-15 |
US20180048126A1 (en) | 2018-02-15 |
US10193311B2 (en) | 2019-01-29 |
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