A Method for Measuring Synthetic Temperature of Superhard Materials

A technology of superhard materials and synthetic blocks, which is applied in thermometers, measuring heat, measuring devices, etc., can solve problems such as difficult measurement of superhard material synthesis temperature, achieve good guiding significance, high measurement success rate, and not easy to break.

Active Publication Date: 2021-10-08
ZHENGZHOU ZHONGNAN JETE SUPERABRASIVES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the traditional temperature measurement method is difficult to measure the synthesis temperature of superhard materials, the present invention provides a method for measuring the synthesis temperature of superhard materials, which is suitable for measuring the synthesis temperature of diamond and cubic boron nitride superhard materials

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  • A Method for Measuring Synthetic Temperature of Superhard Materials
  • A Method for Measuring Synthetic Temperature of Superhard Materials
  • A Method for Measuring Synthetic Temperature of Superhard Materials

Examples

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Embodiment 1

[0046] To measure the internal temperature of a certain type of diamond synthesis cavity in a Φ47mm cavity, a B-type platinum-rhodium temperature measuring wire (0.5mm in diameter) is used. The measurement temperature range is 0~1800°C, the error range is 0.25%t, the length of both ends is 100mm, and the diameter is 0.1mm. The copper wire is 23.5mm away from the middle solder point, and each side is wound with a length of 30mm. The middle part of the assembly block is drilled with a drill bit with a diameter of 3.0mm in the horizontal direction of the center part. Drill the hole well, and use the alumina coarse porcelain tube (inner diameter 2.0mm, outer diameter 2.9mm, length 47mm) to penetrate the middle hole of the assembly block, and then insert the finished thermocouple along the outside of the pre-punched hole to ensure The two ends are symmetrical, and the last two sides are covered with two thin alumina porcelain tubes (inner diameter 1.0mm, outer diameter 1.9mm, length...

Embodiment 2

[0048] To measure the internal temperature of a certain type of cubic boron nitride synthesis cavity in a Φ40mm cavity, a tungsten-rhenium temperature measuring wire (0.1mm in diameter) is selected. The mm copper wire is 10.0mm away from the middle solder point, and each side is wound with a length of 30mm. The middle part of the assembly block is drilled with a drill bit with a diameter of 2.5mm in the horizontal direction of the center part. Drill the hole well, use the boron nitride coarse porcelain tube (inner diameter 1.8mm, outer diameter 2.8mm, length 40mm) to penetrate the middle hole of the assembly block, and then insert the finished thermocouple along the outer edge of the pre-punched hole to ensure The two ends are symmetrical, and the last two sides are covered with two fine boron nitride porcelain tubes (inner diameter 1.0mm, outer diameter 1.7mm, length 50mm), and the prepared temperature measurement assembly block is baked at 100°C for 1 hour, and placed in the ...

Embodiment 3

[0050] To measure the internal temperature of a certain type of diamond synthesis cavity in a Φ55mm cavity, a B-type platinum-rhodium temperature measuring wire (0.5mm in diameter) is used. The measuring temperature range is 0~1800°C, the error range is 0.25%t, the length of both ends is 120mm, and the diameter is 0.1mm. The copper wire is 27.5mm away from the middle solder point, and each side is wound with a length of 40mm. The middle part of the assembly block is drilled with a drill bit with a diameter of 3.2mm in the horizontal direction of the center part. Drill a hole with a drill bit, and use an alumina coarse porcelain tube (inner diameter 2.2mm, outer diameter 3.2mm, length 55mm) to penetrate the middle hole of the assembly block, and then insert the finished thermocouple along the outside of the pre-punched hole to ensure that both The end is symmetrical, and the last two sides are covered with two fine boron nitride porcelain tubes (inner diameter 1.2mm, outer diame...

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Abstract

The invention provides a method for measuring the synthesis temperature of superhard materials. Firstly, a platinum-rhodium temperature measuring wire or a tungsten-rhenium temperature measuring wire is used to make a thermocouple; then, the synthetic block is punched and the thermocouple produced in step 1) is installed Assemble the temperature measurement assembly block on the synthesis block; dry the temperature measurement assembly block and place it in the six-sided top press, and connect the two ends of the thermocouple to the data acquisition instrument for detecting data, the six-side top press Start the synthesis, start recording data during heating until the end of heating, and save the recorded data to the computer; finally, use data processing software to make a complete temperature change curve. The invention adopts platinum-rhodium temperature measuring wire or tungsten-rhenium temperature measuring wire to make thermocouple, and uses thermocouple to measure the temperature change inside the synthesis chamber. The prepared thermocouple is very little affected by high voltage and heating current, and can accurately measure synthesis The temperature change trend inside the cavity solves the problem of traditional temperature measurement.

Description

technical field [0001] The invention belongs to the temperature measurement technology inside a superhard material high temperature and high pressure synthesis cavity, in particular to a method for measuring the synthesis temperature of cubic boron nitride and diamond. Background technique [0002] At present, domestic superhard materials (cubic boron nitride and diamond) are all manufactured under the conditions of high temperature and high pressure by six-sided top press. In the process of preparing cubic boron nitride and diamond, the synthesis temperature is an important factor affecting the hardness and quality of superhard materials. Because raw materials such as graphite are in a closed high-pressure chamber during the preparation process, temperature measurement is very difficult. At present, superhard materials are prepared by six-sided presses in China, and the control of temperature is transformed into the control of current or power. The traditional method of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K7/04
CPCG01K7/04
Inventor 王义煌张相法赵海军位星
Owner ZHENGZHOU ZHONGNAN JETE SUPERABRASIVES
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