搜索结果: 1-12 共查到“工学 DIELECTRIC-PROPERTIES”相关记录12条 . 查询时间(0.095 秒)
Effect of freezing rate and comminution on dielectric properties of pork
radio-frequency heating microwave heating meat properties meat batter
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2014/2/24
The impact of comminution and the freezing rate on the dielectric properties (ε' and ε'') of meats measured at frequencies used for cooking, i.e. radio frequency, RF (27.12 MHz), and microwave, MW (91...
100 Hz～3.98 MHz下苹果虎皮病果实电特性研究（Dielectric Properties of Fuji Apple Superficial Scald in the 100Hz～3.98MHz Range）
苹果 虎皮病 电特性
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2010/12/29
为了研究富士苹果虎皮病病果电特性的变化规律，探讨利用电特性参数的变化来反映苹果内部的物理化学变化，运用LCR型电子测量仪测定了100Hz～3.98MHz频率、（20±1）℃恒温条件下贮藏1、8、15、22和29d的虎皮病果实复阻抗、电抗、电导、电容和介质损耗系数等电学参数。结果显示：在同一贮藏时间下，随着频率的增加，果实的复阻抗、电抗值在减小，电导值则在增加；而电容和果实的介质损耗系数变化则没...
高温处理对食用调和油微波介电特性与品质的影响（Effect of High-temperature Heat Treatment on Microwave Dielectric Properties and Qualities of Mixed Edible Oil）
调和油 高温处理 相对介电常数 介质损耗因数
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2010/12/29
以食用调和油为研究对象，采用同轴探头技术测量了高温处理（120～240℃，3～15h）后调和油在200～4500MHz的微波介电特性和品质指标。结果表明：未处理调和油的相对介电常数ε′r和介质损耗因数ε″r随频率的变化而变化，经高温处理后ε′r和ε″r基本不随频率改变。与未受高温处理相比，处理使同频率下调和油的ε′r减小，ε″r增大。高温处理的温度、时间对介电参数值有一定的影响。当温度大于18...
Dielectric properties of polycrystalline (Ba0.60Sr0.40)Ti0.8O3
Ferroelectric Solid solution Phase transformation
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2009/12/2
Purpose: The purpose of the work was to determinate the influence of the ferroactive Sr substitutions in
sublattice A and the nonstoichiometry in sublattice B on changes of physical properties and th...
Structural and dielectric properties of polycrystalline (Ba0.9Sr0.1)TiO3
Ceramics Ferroelectric Dielectric properties
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2009/12/2
Purpose: This work is aimed to determination of the influence of Sr – ferroactive substitution on physical properties and character of phase transitions (PT) in barium titanate BaTiO3 (BT).
Design/me...
Influence of thermal treatment temperature on the dielectric properties of wood
dielectric properties temperature heating wood high-frequency
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2009/11/26
The effect of thermal treatment temperature on the dielectric properties of beech (Fagus sylvatica L.) and spruce (Picea abies L.) was investigated. Wood disks with a diameter of 45 mm and a thickness...
Dielectric properties of polycrystalline (Ba0.40Sr0.60)O3
Ferroelectric Solid solution Phase transition Dielectric properties Cluster
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2010/8/16
Barium strontium titanate (Ba0,40Sr0,60)TiO3 (BS60T) is the solid solution of the ferroelectric BaTiO3 (BT) and the ferroelectric SrTiO3 (ST) [1, 2]. The dielectric behaviour of (Ba1-xSrx)TiO3 (BSxT) ...
Dielectric Properties of Frozen Surimi at 915 MHz and 2450 MHz
dielectric properties frozen surimi microwave thawing
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2009/6/17
Dielectric properties of two types of unsalted frozen surimi (SA grade made on shipboard and K grade made in onshore plants) at 2450 MHz and 915 MHz were measured from 30°C to 30°C by the open-ended c...
桃10~4500 MHz间的介电特性与内部品质关系分析（Relationship between Dielectric Properties from 10 to 4500 MHz and Internal Quality of Peaches）
桃 品质 可溶性固形物 含水率 介电特性
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2010/4/1
以不同成熟度的银风桃为对象，利用同轴探头技术测量了25℃下10~4500MHz间桃肉和桃汁的介电参数，并测量了桃肉的含水率、桃汁的可溶性固形物含量、pH值和电导率，分析了介电特性和内部品质间的关系。结果表明，桃肉和桃汁的相对介电常数皆随着频率的增大单调减小，而介质损耗因数呈现“V”型的变化趋势。离子的导电性和偶极子的极化分别是引起低频和高频下介电损耗的主要原因。桃肉和桃汁的介电参数与可溶性固形物含...
Dielectric properties of Y-doped Ba1–xSrxTiO3 ceramics
Y-doped Ba1–xSrxTiO3 ceramics dielectric properties
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2011/5/6
Y-doped Ba1–xSrxTiO3 (Y-BST) ceramics (x = 0.1, 0.2, 0.4, 0.7) were prepared by solid-state
reaction and sintered at 1250, 1300, 1350, and 1400 °C for 1 h. The effect of strontium solution
and sinte...
Effects of Dielectric Properties on Temperature Distributions in Food Model during Microwave Heating
dielectric properties heat transfer analysis mathematical model
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2010/11/23
To investigate heat transfer phenomena in cylindrical foods of different dielectric properties with microwave heating, the dielectric constant, loss factor and the temperature distributions of samples...
Thick Film Capacitor Materials of the Powder–Glass Binary Systems and Their Dielectric Properties
Thick Film Capacitor Materials the Powder–Glass Binary Systems Dielectric Properties
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2010/12/28
Descriptions are given of the fundamental dielectric properties of the thick film binary system, composed of dielectric powder and glass, in relation to the effect of bulk properties of the constituen...