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成瓷
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  formed ceramics
     In rich-TiO 2 area,the formed ceramics have a wide range of temperature (1280~1360℃)and excellent dielectric properties when BaO/Nd 2O 3≤0.4.
     在富TiO2 区 ,BaO/Nd2 O3 ≤0 4时 ,成瓷温度较宽 ( 1 2 80~ 1 36 0℃ ) ,制得的瓷料具有优良的介电性能
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  “成瓷”译为未确定词的双语例句
     The results indicated that the film prepared with formula of x = 0 35 and K + content= 1 0% (K/Ti, mol/mol), and sintered at 850 ℃/1 h, displayed the sensitivity S =3 3×10 3 in the range of RH =8 0%~93 6%, response time τ =15 s and humidity hysteresis≤±2%;
     结果表明 :在x =0 .3 5 ,K+ 含量为 1%(K/Ti,mol/mol) ,以及 85 0℃ /1h的烧结晶化成瓷条件下 ,所制得的陶瓷薄膜在RH =8.0 %~ 93 .6%的实测范围内 ,灵敏度S =3 .3× 10 3 ,感湿响应时间τ =15s,湿滞≤± 2 %;
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     Powders of Bi_2(Zn_ 1/3 Ta_ 2/3 )_2O_7(β-BZT)and CaTiO_3(CT)lump sinter are chosen as positive and negative temperature coefficient constituents for preparation of zero temperature coefficient microwave ceramics.
     采用预成瓷的方法,得到单斜类锆钙钛矿相Bi2(Zn1/3Ta2/3)2O7(β-BZT)和钙钛矿相CaTiO3(CT)的粉末,分别作为正负温度系数组元制备复相零温度系数微波陶瓷。
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     Good quality Potassium bismuth titanate (K0.5Bi0.5TiO3) ceramics is fabricated successfully with K0.5Bi0.5TiO3 nano-powders prepared by Sol-Gel process.
     采用溶胶-嵌胶工艺成功制备出K0.5Bi0.5TiO3微细粉料,并利用此微粉烧结出成瓷良好的K0.5Bi0.5TiO3陶瓷。
     Because of the greater dielectric loss and the higher porcelain-forming temperature,(Ag_(0.9)Na_(0.1))(Nb_(0.6)Ta_(0.4))O_3 porcelain powder is prepared by wet chemical method and it is characterized by X-ray Diffraction(XRD),infrared( IR),transmission electronic microscope(TEM).
     针对微波介质瓷料系统成瓷过程中介电损耗较大且成瓷温度较高的问题,采用湿化学法制备(Ag0.9Na0.1)(Nb0.6Ta0.4)O3粉体,并采用XRD、IR和TEM等分析方法进行表征.
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     The ceramics shows hexagonal structure at room temperature. The lattice parameters a=4.92 nm,c=5.19 nm. NBMT ceramic has low sintering temperature,its sintering temperature was around 1 050 ℃.
     NBMT为低温烧结陶瓷,成瓷温度在1 050℃左右,室温下具有六方结构,点阵常数a=4.92 nm,c=5.19 nm。
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     The Study of Raising the Shaping Rate of Semi-Finished Products of High-Grade Tusk Porcelain
     提高高级象牙坯率的研究
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     (4) Contextual instruction and achievement motivation have no direct effect on interest and academic performance, achievement goal is mediate variable.
     (4)
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     A STUDY ON THE CERAMIC RAW MATERIALS FROM HEILONGJIANG PROVINCE AND THEIR EXPERIMENT IN PORCELAIN PREPARATION
     黑龙江某县陶原料及其试验研究
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     An Introduction on the Porcelain of Jun Kiln
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     Preparation of Jinhua Porcelain
     金华的研制
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  formed ceramics
ZrO2 (3 mol% Y2O3) tetragonal and t'-ceramics (displacively formed ceramics) were compared with ZrO2 ceramics (3 mol% Ln2O3, where Ln=La, Pr, Nd, Sm, Gd, Tb, Dy, Er, or Yb) processed in an identical manner.
      


Semiconducting potasium niobate ceramic specimens have been prepared bysintering the synthesized KNbO_3 powder with the addition of K_2O-GeO_2 glass.The specimens thus obtained show two anomalies in resistivity,known as PTCeffect,near 230℃ and 430℃ respectively,which correspond to the transition tem-peratures of KNbO_3 crystal.The processing parameters,such as sintering tempera-ture,soaking time,etc.,have some effects on the sintering behavior,electricalproperties and microstructural development of the final...

Semiconducting potasium niobate ceramic specimens have been prepared bysintering the synthesized KNbO_3 powder with the addition of K_2O-GeO_2 glass.The specimens thus obtained show two anomalies in resistivity,known as PTCeffect,near 230℃ and 430℃ respectively,which correspond to the transition tem-peratures of KNbO_3 crystal.The processing parameters,such as sintering tempera-ture,soaking time,etc.,have some effects on the sintering behavior,electricalproperties and microstructural development of the final specimen.The results ofSEM and TG experiments show that K_2O evaporation occurs significantly from thesintered specimen and a considerable amount of pore exists at the grain boundary.These results are discussed finally.

通过在 KNbO_3合成料中添加钾锗玻璃的方法,烧结后得到了 KNbO_3半导瓷,其样品有较大电阻率,并在 KNbO_3晶体的两个相变点附近发生 PTC 电阻反常。样品的制备工艺参数如烧结温度、保温时间等对其成瓷性能、电学性能和显微结构等均有影响。对样品所做的 SEM 和 TG 分析结果表明:在 KNbO_3陶瓷中,K_2O 在烧结温度下发生明显的挥发,样品中晶粒和晶粒之间含有较多气孔。KNbO_3材料的固有特性和成瓷特性使该半导瓷具有一些独特的电学性能。

Xiahe porcelain stone is a kind of sedimentary rock,which has recently been found in Xiahe,Jianxi Province.The geological characteristics,the mineral features, the technological properties in ceramic process and its application perspective in ce- ramic industry of the sedimentary porcelain stone are expounded in this paper.

本文论述了新近在江西下河发现的沉积型瓷石的地质特点、矿石特征、精泥性能、成瓷工艺及其开发应用前景。

BaTiO_3 powder prepared by coprecipitation of barium oxalic titanate was chosen as matrix material and a magnesic organic salt solution containing 5wt% MgO was added for coating MgO on particle surface of the powder. Magnesic organic salt solution was synthesized by MgCO_3.The solution was completely dispersed in BaTiO_3 matrix in proportion by ball milling or high-speed stirring or ultrasonic dispersing. As a result, magnesic organic salt solution was uniformly coated on particle surface of the powder. The...

BaTiO_3 powder prepared by coprecipitation of barium oxalic titanate was chosen as matrix material and a magnesic organic salt solution containing 5wt% MgO was added for coating MgO on particle surface of the powder. Magnesic organic salt solution was synthesized by MgCO_3.The solution was completely dispersed in BaTiO_3 matrix in proportion by ball milling or high-speed stirring or ultrasonic dispersing. As a result, magnesic organic salt solution was uniformly coated on particle surface of the powder. The coated powder was sprayed and completely dried in vacuum oven at low temperature,then the white and loose precursor was obtained. After calcining at 800℃, BaTiO_3 superfire powder coated by MgO was obtained. Its average particle size is of 0.48μm(D_(50)) and 0.17μm (D_(?)), respectively. By characterizing the matrix, MgTiO_3 phase is formed and MgO nonexisted. The morphology of particles is spheroidal. The particle size is within 1000~3000A, but, a part of particles of the prepared powder is agglomerated. The ceramic material sintered by this kind of powder possesses finer grain (0.1 ~0.3μm), higher density and hardness as well as breaking voltage in compared with those prepared by conventional methods. It has also indicated that it is beneficial to prevent grain growth, enhance density and hardness of the sintered material and enlarge its sintering temperature range.

选取用草酞酸钡共沉淀法生产的BaTiO_3粉料为基体原料,加入5(wt)%MgO进行粉体颗粒表面改性。对粉体的表征及X-射线结构分析结果表明,Mg与基体表面充分反应,生成MgTiO_3新相,无游离MgO存在,一次颗粒形貌为球状,粒度均在100~300nm范围内,但颗粒团聚情况仍存在。用获得的粉料进行成瓷试验,制得细晶(1.00~300nm),高致密,而显微硬度与耐电场击穿强度都较一般的BaTiO_3基陶瓷高的试样。结果表明,加镁改性有阻止晶粒生长、提高致密度、扩大烧成温度范围和提高硬度的作用。

 
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