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    • 3. 发明授权
    • Hot axial pressing method
    • 热轴压法
    • US08221664B2
    • 2012-07-17
    • US12519583
    • 2007-12-19
    • Guenter ZeitlerHerbert SchreinemacherCornelis Ronda
    • Guenter ZeitlerHerbert SchreinemacherCornelis Ronda
    • B29C47/76
    • C04B35/645B30B15/0017C04B35/547C04B2235/3224
    • A hot axial pressing method for sintering a ceramic powder, particularly doped Gd2O2S, comprises the step of placing a first porous body (7), the ceramic powder (9) and a second porous body (7) into a mould shell (5) supported by a support (13, 14). The ceramic powder (9) is located between the porous bodies (7). Gaseous components are evacuated from the ceramic powder (9) up to an ambient pressure of less than 0.8 bar. The porous body (7) and the ceramic powder (9) are heated to a maximum temperature of at least 900° C. and are applied to a pressure up to a maximum pressure of at least 75 Mpa. According to the invention the variation in time of the heating step and the variation in time of the pressure applying step is adjusted to each other such that the mould shell 5 is held by the porous bodies (7) and/or the ceramic powder (9) in a state where the mould shell (5) and the support (13, 14) are disconnected with respect to each other.
    • 用于烧结陶瓷粉末,特别是掺杂Gd 2 O 2 S的热轴向压制方法包括将第一多孔体(7),陶瓷粉末(9)和第二多孔体(7)放置在支撑的模壳(5)中的步骤 通过支持(13,14)。 陶瓷粉末(9)位于多孔体(7)之间。 将气态组分从陶瓷粉末(9)排出至小于0.8巴的环境压力。 将多孔体(7)和陶瓷粉末(9)加热至至少900℃的最高温度,并施加至至多75Mpa的最大压力的压力。 根据本发明,加热步骤的时间变化和压力施加步骤的时间变化相互调节,使得模制壳体5由多孔体(7)和/或陶瓷粉末(9)保持 )在模壳(5)和支撑件(13,14)之间相对于彼此断开的状态。
    • 6. 发明授权
    • Method of coating red-luminescing phosphor particles with hematite
    • 用赤铁矿涂覆红色发光的荧光体颗粒的方法
    • US5387436A
    • 1995-02-07
    • US153381
    • 1993-11-16
    • Cornelis RondaGuido HuttenMichael BredolUlrich KynastThomas Rink
    • Cornelis RondaGuido HuttenMichael BredolUlrich KynastThomas Rink
    • C09C1/24C09C1/22C09C3/06C09K11/02C09K11/08C09K11/77C09K11/84H01J29/20B05D7/00
    • C09K11/025C09K11/7789H01J29/20
    • The invention relates to a method of coating red-luminescing phosphor particles with hematite (.alpha.--Fe.sub.2 O.sub.3), whereby first Fe(OH).sub.3 is deposited on the phosphor particles and subsequently converted into .alpha.--Fe.sub.2 O.sub.3 at a raised temperature. A good adhesion of the hematite pigments to the phosphor particles is achieved in that first an aqueous solution of an iron(III) salt and a complexing agent is prepared, in which the complexing agent and its concentration are so chosen that in combination with Fe.sup.3+ ions complex ions are formed which on the one hand do not yet precipitate at a pH-value which is at least 0.5 higher than the value at which the phosphor particles just fail to be chemically attacked anymore, and which are dissociable at a further increase in the pH-value so that Fe(OH).sub.3 is formed, in that subsequently, if the pH-value is not yet high enough, a basic substance is added to the mixture, in that the pH-value is increased to a value which is at least 0.5 below the value at which Fe(OH).sub.3 starts to precipitate and at least 0.5 higher than the value at which the phosphor particles just fail to be chemically attacked anymore, in that subsequently the phosphor particles are added while stirring, in that at any moment, as required, a substance is added which dissociates upon an increase in temperature and which behaves as a base upon dissociation, and in that then the temperature of the suspension is slowly increased, whereby the phosphor particles are coated with Fe(OH).sub.3 through homogeneous precipitation.
    • 本发明涉及一种用赤铁矿(α-Fe 2 O 3)涂覆红色发光荧光体颗粒的方法,其中首先将Fe(OH)3沉积在荧光体颗粒上,随后在升高的温度下转化成α-Fe2O3。 实现了赤铁矿颜料对磷光体颗粒的良好粘合性,首先制备铁(III)盐和络合剂的水溶液,其中络合剂及其浓度选择为与Fe 3+离子结合 形成复合离子,其一方面尚未沉淀,其pH值比荧光体颗粒刚刚不能被化学侵蚀的值高至少0.5,并且其在离子可以进一步增加 pH值使得形成Fe(OH)3,因此,如果pH值还不够高,则向混合物中加入碱性物质,因为pH值增加到 比Fe(OH)3开始沉淀的值低至少0.5以上,并且至少比荧光体粒子不再化学侵蚀的值高0.5,随后在搅拌下加入荧光体颗粒,因此 任何时候 根据需要,加入随着温度升高而离解的物质,并且在解离时表现为碱,然后缓慢升高悬浮液的温度,由此荧光体颗粒用Fe(OH)3涂覆通过 均匀降水
    • 8. 发明申请
    • Low-pressure gas-discharge lamp having an electrode
    • 具有电极的低压气体放电灯
    • US20050258756A1
    • 2005-11-24
    • US10521133
    • 2003-07-02
    • Cornelis DenissenCornelis Ronda
    • Cornelis DenissenCornelis Ronda
    • H01J61/06H01J61/067H01J17/04H01J61/04
    • H01J61/067
    • A low-pressure gas-discharge lamp provided with a gas-tight discharge vessel that contains a gas filling, with electrodes for maintaining a gas discharge in the discharge vessel, at least one of which electrodes is arranged inside the discharge vessel and comprises a coil having a core made from a first metallic refractory material that has a first electronegativity, having a surrounding winding made from a second metallic refractory material that has a second electronegativity, having a coating of an electron-emitting material arranged between the core and the winding and having current feeds, and with means for starting and maintaining a gas discharge. The invention also relates to an electrode.
    • 一种低压气体放电灯,其具有包含气体填充物的气密放电容器,具有用于在放电容器内保持气体放电的电极,其中至少一个电极布置在放电容器的内部,并且包括线圈 具有由具有第一电负性的第一金属耐火材料制成的芯,具有由具有第二电负性的第二金属耐火材料制成的环绕绕组,具有布置在所述芯和绕组之间的电子发射材料的涂层,以及 具有电流进料,并具有启动和维持气体排放的装置。 本发明还涉及电极。