专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH11190706A METHOD FOR ANALYZING MODULATION DIFFERENCE 失效
公开(公告)号：JPH11190706A
公开(公告)日：1999-07-13
申请号：JP29077898
申请日：1998-10-13
申请人： TA INSTR INC
发明人： READING MICHAEL , HAHN BRIAN K , CROWE BENJAMIN S
IPC分类号： G01N25/20 , G01N25/18 , G01N25/48 , G01Q90/00
摘要： PROBLEM TO BE SOLVED: To substantially improve resolution for a change by controlling a driving variable in a differential analysis technique and using a variable change ratio of the driving variable. SOLUTION: In a differential scan analysis, a temperature is a driving variable and a heat transfer is a characterizing differential physical parameter. A differential scan analyzer 111 measures a difference of heat transfers between a sample saucer 112 and a reference substance saucer 113 supported by an internal thermoelectric disk 116 in a furnace chamber 124. The disk 116 functions as a heat transfer route from a furnace 119 to the sample saucer 112 and substance saucer 113, and is used as a common material of a differential thermocouple. A microcomputer 127 controls a power to the furnace 119 with the use of a heater controller 125, thereby controlling temperatures. A personal computer 110 and a digital plotter 109 are used to analyze, store and display data. In an application example of the differential scan analysis, the larger a difference of a maximum heating ratio and a basic heating ratio and the smaller a sample temperature deviation in a modulation period, the more sensitivity and resolution are improved.

2. 发明授权

US5224775B1 Method and apparatus for modulated differential analysis 失效
标题翻译：用于调制差分分析的方法和装置
公开(公告)号：US5224775B1
公开(公告)日：1994-07-19
申请号：US84444892
申请日：1992-03-02
申请人： TA INSTR INC
发明人： READING MICHAEL , HAHN BRIAN K , CROWE BENJAMIN S
IPC分类号： G01N25/20 , G01N25/18 , G01N25/48 , G01Q90/00 , G01N25/00
CPC分类号： G01N25/18 , G01N25/4833 , G01N25/4866

3. 发明授权

US5439291C1 Method and apparatus for ac differential thermal analysis 失效
标题翻译：交流差热分析方法和装置
公开(公告)号：US5439291C1
公开(公告)日：2002-04-16
申请号：US17165693
申请日：1993-12-22
申请人： TA INSTR INC
发明人： READING MICHAEL
IPC分类号： G01N25/48 , G01N25/00
CPC分类号： G01N25/4833 , B82Y15/00 , G01N25/18 , G01N25/4866

4. 发明授权

US5346306C1 Method and apparatus for modulated differential analysis 失效
公开(公告)号：US5346306C1
公开(公告)日：2002-05-07
申请号：US6021493
申请日：1993-05-07
申请人： TA INSTR INC
发明人： READING MICHAEL , HAHN BRIAN K , CROWE BENJAMIN S
IPC分类号： G01N25/20 , G01N25/18 , G01N25/48 , G01Q90/00 , G01N25/00
CPC分类号： G01N25/18 , G01N25/4833 , G01N25/4866

5. 发明授权

US5224775C2 Method and apparatus for modulated differential analysis 失效
标题翻译：用于调制差分分析的方法和装置
公开(公告)号：US5224775C2
公开(公告)日：2002-04-23
申请号：US84444892
申请日：1992-03-02
申请人： TA INSTR INC
发明人： READING MICHAEL , HAHN BRIAN K , CROWE BENJAMIN S
IPC分类号： G01N25/20 , G01N25/18 , G01N25/48 , G01Q90/00 , G01N25/00
CPC分类号： G01N25/18 , G01N25/4833 , G01N25/4866

6. 发明专利

CA2225315A1 METHOD AND APPARATUS FOR PERFORMING LOCALIZED THERMAL ANALYSIS AND SUB-SURFACE IMAGING BY SCANNING THERMAL MICROSCOPY 未知
公开(公告)号：CA2225315A1
公开(公告)日：1997-10-30
申请号：CA2225315
申请日：1997-04-22
申请人： TA INSTR INC
发明人： POLLOCK HUBERT MURRAY MONTAGU , READING MICHAEL , SONG MO , HAMMICHE AZZEDINE
IPC分类号： G01N25/20 , G01N25/48 , G01Q60/58 , G01N25/00 , G01B15/04
摘要： A platinum/rhodium resistance thermal probe is used as an active device which acts both as a highly localized heat source and as a detector to perform localized differential calorimetry, by thermally inducing and detecting events such as glass transitions, meltings, recystallizations and thermal decomposition within volumes of material estimated at a few .mu.m3. Furthermore, the probe is used to image variations in thermal conductivity and diffusivity, to perform depth profiling and sub-surface imaging. The maximum depth of the sample that is imaged is controlled by generating and detecting evanescent temperature waves in the sample.

7. 发明专利

CA2177907A1 METHOD AND APPARATUS FOR GAS FLOW MODULATED DIFFERENTIAL SCANNING CALORIMETRY 未知
公开(公告)号：CA2177907A1
公开(公告)日：1996-12-03
申请号：CA2177907
申请日：1996-05-31
申请人： TA INSTR INC
发明人： READING MICHAEL
IPC分类号： G01K17/00 , G01N25/20 , G01N25/48 , G01N25/40
摘要： A modulated differential scanning calorimeter ("MDSC") wherein the temperature of the sample and/or the reference is modulated by modulating the characteristics of a gas in thermal contact with the sample and or a reference. In a first embodiment, the major heat flow path between the sample/reference and the furnace is the purge gas in the furnace chamber. The composition of the purge gas in the furnace chamber of the DSC cell is modulated by alternately purging the DSC cell with a high thermal conductivity gas (e.g., helium) and with a low thermal conductivity gas (e.g., nitrogen), thus modulating the flow of heat to and from the cell. In a second embodiment, the sample and reference are heated (or cooled) by a temperature-controlling gas flowing around the sample and reference holders. The gas is heated by being passed through a furnace before it flows around the sample and the reference. The flow-rate of the temperaturecontrolling gas is modulated, thus modulating the temperature of the sample and the reference. The third embodiment is similar to the second embodiment, but in the third embodiment, the temperature (not the flow-rate) of the temperaturecontrolling gas is modulated. The third embodiment preferably uses modulation furnaces which have a relatively low thermal mass, such that the sample/reference temperature can be modulated at relatively high modulation rates.

8. 发明专利

CA2225315C METHOD AND APPARATUS FOR PERFORMING LOCALIZED THERMAL ANALYSIS AND SUB-SURFACE IMAGING BY SCANNING THERMAL MICROSCOPY 未知
公开(公告)号：CA2225315C
公开(公告)日：2004-01-27
申请号：CA2225315
申请日：1997-04-22
申请人： TA INSTR INC
发明人： HAMMICHE AZZEDINE , POLLOCK HUBERT MURRAY MONTAGU , SONG MO , READING MICHAEL
IPC分类号： G01N25/20 , G01N25/48 , G01Q60/58 , G01N25/00 , G01B15/04
摘要： A platinum/rhodium resistance thermal probe is used as an active device which acts both as a highly localized heat source and as a detector to perform localized differential calorimetry, by thermally inducing and detecting events such as glass transitions, meltings, recystallizations and thermal decomposition within volumes of material estimated at a few .mu.m3. Furthermore, the probe is used to image variations in thermal conductivity and diffusivity, to perform depth profiling and sub-surface imaging. The maximum depth of the sample that is imaged is controlled by generating and detecting evanescent temperature waves in the sample.

9. 发明专利

CA2247868A1 METHOD AND APPARATUS FOR PERFORMING CHEMICAL ANALYSIS USING IMAGING BY SCANNING THERMAL MICROSCOPY 未知
公开(公告)号：CA2247868A1
公开(公告)日：1998-07-09
申请号：CA2247868
申请日：1997-12-30
申请人： TA INSTR INC
发明人： READING MICHAEL
IPC分类号： G01N25/00 , G01N1/00 , G01N1/04 , G01N1/28 , G01N13/10 , G01N25/48 , G01N25/72 , G01N27/62 , G01N31/20 , G01N7/16 , G01N1/44
摘要： Sub-micron chemical analysis of the surface and sub-surface of a sample material is performed at, above or under atmospheric pressure, or on for a sample material submerged in a substance. A thermal and/or topographic image of the surface of the sample material is obtained. A location for study is selected using the image. The activation device is positioned over the selected location and surface and/or sub-surface products are ablated, desorbed or decomposed from the sample material to a chemical analyzer for analysis.

10. 发明专利

CA2156797A1 Method and Apparatus for Parsed Dynamic Differential Analysis 未知
公开(公告)号：CA2156797A1
公开(公告)日：1996-02-25
申请号：CA2156797
申请日：1995-08-23
申请人： TA INSTR INC
发明人： READING MICHAEL
IPC分类号： G01N25/20 , G01N25/48
摘要： The interpretation of dynamic differential calorimetry ("DDSC") data is enhanced by parsing the data according to whether it is obtained while the sample is being heated, cooled, or re-heated. Each DDSC scan is split up into three separate components, depending upon whether the sample is undergoing heating, cooling or reheating. Each component can then be analyzed separately to investigate the sample response to temperature change as the sample is being heated, cooled, or re-heated. Each file is deconvoluted separately, using a deconvolution routine that first removes the effect of the phase lag due to the instrument's finite response time.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式