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    • 3. 发明授权
    • Process for producing acicular goethite particles and acicular magnetic
iron oxide particles
    • 制备针状针铁矿颗粒和针状磁性氧化铁颗粒的方法
    • US5399278A
    • 1995-03-21
    • US22844
    • 1993-02-25
    • Katsumi YamashitaTosiharu HaradaHaruki KurokawaKazuhisa InabaHideaki SadamuraTomohisa MoriyaJunichi Kawano
    • Katsumi YamashitaTosiharu HaradaHaruki KurokawaKazuhisa InabaHideaki SadamuraTomohisa MoriyaJunichi Kawano
    • C01G49/00C01G49/06C01G49/08G11B5/706H01F1/11
    • G11B5/70642B82Y30/00C01G49/06C01G49/08C01P2004/03C01P2004/10C01P2004/51C01P2004/54C01P2004/62C01P2004/64C01P2006/42
    • Disclosed herein are a process for producing acicular goethite particles comprising the steps of: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous hydroxide or iron-containing colloidal precipitates which is obtained by reacting an aqueous ferrous salt solution with less than one equivalent of an aqueous alkali hydroxide solution and/or an aqueous alkali carbonate solution based on Fe.sup.2 + in said aqueous ferrous salt solution so as to oxidize said colloidal ferrous hydroxide or iron-containing colloidal precipitates and to produce acicular goethite nucleus particles, adding to the resultant aqueous ferrous salt reaction solution containing said acicular goethite nucleus particles not less than one equivalent of an aqueous alkali carbonate solution based on Fe.sup.2 + in said aqueous ferrous salt reaction solution, and blowing an oxygen-containing gas into the mixed aqueous ferrous salt reaction solution so as to grow said goethite nucleus particles; and a process for producing acicular magnetic iron oxide particles by reducing the acicular goethite particles obtained in the above process to produce acicular magnetite particles, and if necessary, oxidizing the acicular magnetite particles to obtain acicular maghemite particles, and if necessary, modifying the acicular magnetite or maghemite particles with Co or Co and Fe.sup.2 +.
    • 本文公开了一种制备针状针铁矿颗粒的方法,包括以下步骤:将含氧气体吹入含有胶态氢氧化亚铁或含铁胶体沉淀物的亚铁盐反应溶液中,该溶液通过使亚铁盐水溶液与小于 1当量碱金属氢氧化物水溶液和/或基于Fe2 +的碱金属碳酸盐水溶液,在所述含水亚铁盐水溶液中氧化所述胶态氢氧化亚铁或含铁胶体沉淀物,并生成针状针铁矿颗粒,加入到 得到含有所述针状针铁矿颗粒的所述含水亚铁盐反应溶液,其含量不低于所述含水亚铁盐反应溶液中基于Fe2 +的碱金属碳酸盐水溶液的1当量,并将含氧气体吹入混合的含水亚铁盐溶液中, 成长为针铁矿核心部分 粒子 以及通过将上述方法中得到的针状针铁矿粒子还原而制造针状磁性氧化铁粒子的方法,制造针状磁铁矿粒子,根据需要,根据需要氧化针状磁铁矿粒子,得到针状磁赤铁矿粒子,根据需要,对针状磁铁矿 或具有Co或Co和Fe2 +的磁赤铁矿颗粒。
    • 5. 发明申请
    • Abnormal noise correction verification apparatus
    • 异常噪声校正装置
    • US20070185664A1
    • 2007-08-09
    • US11655065
    • 2007-01-19
    • Tsutomu TanakaJunichi KawanoToshiaki YoshidaJunichi Amakasu
    • Tsutomu TanakaJunichi KawanoToshiaki YoshidaJunichi Amakasu
    • G01L7/00G01M17/00
    • G01M17/007G01M13/028G01M13/045
    • An abnormal noise correction verification apparatus is provided that can easily verify the effectiveness a corrective action with respect to an abnormal noise being generated. The apparatus has at least one vibration sensor, which detect vibrations of the vehicle. The apparatus extracts a signal in a specific frequency band for the vibrations detected from the vibration sensor. The apparatus stores a pre-corrective action signal extracted from the vibration sensor, which is from before eliminating a cause of abnormal noise, and a post-corrective action signal extracted from the vibration sensor, which is from after eliminating the cause of abnormal noise. Both pre-corrective action signal and the post-corrective action signal were detected under identical travel conditions by the vibration sensor. The apparatus then synchronizes and separately outputs the pre-corrective action signal and the post-corrective action signal for comparison.
    • 提供了一种异常噪声校正验证装置,其可以容易地验证有效性,以产生关于异常噪声的校正动作。 该装置具有至少一个振动传感器,其检测车辆的振动。 该装置从振动传感器检测到的振动提取特定频带中的信号。 该装置存储从消除异常噪声原因之前的从振动传感器提取的预纠正动作信号,以及从消除异常噪声的原因之后的从振动传感器提取的后校正动作信号。 通过振动传感器在相同的行驶条件下检测预纠正动作信号和后修正动作信号。 该装置然后同步并分别输出预纠正动作信号和后置纠正动作信号进行比较。