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CN-122013145-A - Method and device for diamond surface coating

CN122013145ACN 122013145 ACN122013145 ACN 122013145ACN-122013145-A

Abstract

A method and a device for diamond surface coating belong to the technical field of material engineering. The method comprises the steps of placing a container containing experimental raw materials at a non-heating area at the head end of a quartz tube of a tube furnace, waiting for the temperature of the tube furnace to rise, controlling a traction device connected with a thermocouple to traction the container to a heating area of the quartz tube according to real-time temperature information fed back by the thermocouple when the tube furnace rises to the temperature required by an experiment, controlling airflow of a rotor flowmeter on an air tube communicated with the quartz tube, enabling the raw materials in the container to react, and after the reaction is finished, driving the container to the non-heating area at the tail end of the quartz tube by the traction device to traction the thermocouple, closing the airflow of the rotor flowmeter, and after the reaction is finished, obtaining diamond particles with uniform plating layers of single crystal faces, and cleaning to obtain cleaned plated diamond. The invention ensures that the raw materials react in a constant temperature environment in a heating zone, ensures that each crystal face of single diamond particle is heated uniformly and is plated uniformly.

Inventors

  • MENG QINGNAN
  • WANG SIFAN
  • MAO XINYUE
  • LIU BAOCHANG
  • YUAN MU
  • QIU YUTING

Assignees

  • 吉林大学

Dates

Publication Date
20260512
Application Date
20260415

Claims (8)

  1. 1. The diamond surface coating method is characterized by comprising the following steps: (a) Placing a container (3) containing experimental raw materials (9) at a non-heating zone (11) at the head end of a quartz tube (2) of a tube furnace, and waiting for the temperature of the tube furnace to rise; (b) When the tube furnace is heated to the temperature required by the experiment, the control device (7) controls the traction device (8) connected with the thermocouple (4) to traction the vessel (3) to the heating zone (12) of the quartz tube (2) according to the real-time temperature information fed back by the thermocouple (4) connected with the vessel (3), and simultaneously controls the airflow of the rotameter (1) on the air tube communicated with the quartz tube (2) to enable the experimental raw material (9) in the vessel (3) to react; (c) After the reaction is finished, the thermocouple (4) is pulled by the traction device (8) to drive the container (3) to the tail end non-heating area (13) of the quartz tube (2), meanwhile, the airflow of the rotameter (1) is closed, the reaction is finished, the diamond particles (10) with single crystal face uniform coating are obtained, and the cleaned coating diamond is obtained.
  2. 2. The method according to claim 1, wherein during the steps (a) - (c), different gases are filled in the quartz tube (2) according to different diamond coatings, and the flow rate of the gases is controlled by controlling the airflow rate of the rotameter (1) arranged on the air tube through the control device (7).
  3. 3. The method according to claim 1, wherein the temperature of the head non-heating zone (11) and the end non-heating zone (13) is below 200 ℃.
  4. 4. The method according to claim 1, wherein the experimental raw material (9) contained in the container (3) comprises diamond particles (10) and a coating material.
  5. 5. The method of claim 1, wherein the control device (7) is a programmable logic controller or a single chip microcomputer, and the control device (7) is further connected with a touch display screen for displaying real-time temperature and air flow parameters.
  6. 6. The method according to claim 1, wherein the traction device (8) comprises a traction wire and a traction machine, one end of the traction wire is connected to a traction wheel of the traction machine, the other end of the traction wire is connected to the thermocouple (4), and the traction machine is connected to the control device (7).
  7. 7. The device adopting the method as claimed in any one of claims 1 to 6, comprising a tube furnace, a traction device (8), an air tube, a thermocouple (4) and a control device (7) arranged on the tube furnace, wherein a quartz tube (2) is arranged in the tube furnace chamber (5), the air tube is communicated with the head end of the quartz tube (2), the traction device (8) is arranged at the tail end of the quartz tube (2), the control device (7) is respectively connected with a rotameter (1), the traction device (8) and the thermocouple (4) arranged on the air tube, one end of the thermocouple (4) is connected with a container (3) arranged on the quartz tube (2), the other end of the thermocouple is connected with the traction device (8), and the control device (7) controls the airflow velocity of the rotameter (1) on the air tube and the movement of the container (3) pulled by the traction device (8) during reaction according to temperature information fed back by the thermocouple (4) in real time.
  8. 8. The device according to claim 7, wherein the traction device (8) comprises a traction wire and a traction machine, one end of the traction wire is connected to a traction rotating wheel of the traction machine, the other end of the traction wire is connected to the thermocouple (4), and the traction machine is connected to the control device (7).

Description

Method and device for diamond surface coating Technical Field The invention belongs to the field of material engineering, and particularly relates to a method and a device for diamond surface coating. Background The tube furnace is used as a common heating device in the field of materials, is widely applied to diamond surface coating experiments and is used for heating diamond and reaction raw materials in the reaction. However, if the temperature of the diamond and the coating reaction raw materials is raised along with the temperature of the tubular furnace cavity, the diamond coating reaction is also carried out when the temperature of the tubular furnace is raised and lowered, however, the temperature field is unstable and the diamond particles have different crystal faces in the temperature raising and lowering process, and the phenomenon of non-uniform diamond coating is not required by experimental requirements, and the phenomenon of non-uniform diamond coating is generally existed, as shown in fig. 5, the existing diamond surface WC coating obtained by the temperature raising and lowering reaction along with the tubular furnace. Disclosure of Invention The invention provides a method and a device for diamond surface coating aiming at the technical problems. The method aims at enabling experimental raw materials to enter a tubular furnace chamber for reaction after the tubular furnace reaches a required temperature and a stable temperature field, enabling air flow to be regulated and controlled in real time along with the experimental progress (the air flow has obvious influence on a salt bath method or a CVD method of the tubular furnace for preparing diamond coating), and solving the phenomenon that the coating is uneven in the experiment of coating on the diamond surface by using the tubular furnace and does not meet the expected experimental requirement. By adopting the coating method, the coating can be uniform. The aim of the invention is realized by the following technical scheme: The invention relates to a method for plating a diamond surface, which comprises the following steps: (a) Placing a container containing experimental raw materials in a non-heating area at the head end of a quartz tube of a tube furnace, and waiting for the temperature of the tube furnace to rise; (b) When the tube furnace is heated to the temperature required by the experiment, the control device controls the traction device connected with the thermocouple to traction the container to the heating zone of the quartz tube according to the real-time temperature information fed back by the thermocouple connected with the container, and simultaneously controls the airflow of the rotameter on the air tube communicated with the quartz tube to enable the experimental raw materials in the container to react; (c) After the reaction is finished, the thermocouple is pulled by the traction device to drive the container to the tail end non-heating area of the quartz tube, meanwhile, the airflow of the rotameter is closed, the reaction is finished, diamond particles with single crystal face uniform coating are obtained, and the cleaned coating diamond is obtained. Further, in the steps (a) - (c), according to different diamond coatings, different inert gases or reaction gases are filled in the quartz tube, and the flow rate of the gas is controlled by controlling the airflow velocity of the rotameter arranged on the gas tube through the control device. Further, the temperature of the head non-heating zone and the tail non-heating zone is lower than 200 ℃. Further, the experimental raw materials contained in the container comprise diamond particles and a coating material. Further, the control device is a programmable logic controller or a singlechip, and is also connected with a touch display screen for displaying real-time temperature and airflow parameters. Further, the traction device comprises a traction wire and a traction machine, one end of the traction wire is connected to a traction rotating wheel of the traction machine, the other end of the traction wire is connected to the thermocouple, and the traction machine is connected with the control device. The device adopting the method comprises a tubular furnace, a traction device, an air pipe, a thermocouple and a control device, wherein the traction device, the air pipe, the thermocouple and the control device are arranged on the tubular furnace, a quartz pipe is arranged in the tubular furnace chamber, the head end of the quartz pipe is communicated with the air pipe, the traction device is arranged at the tail end of the quartz pipe, the control device is respectively connected with a rotameter, the traction device and the thermocouple which are arranged on the air pipe, one end of the thermocouple is connected with a container which is arranged on the quartz pipe, the other end of the thermocouple is connected with the traction device, and the control device controls the