The pressure controlled hydrothermal synthesis device can be divided into three parts: a three column high-pressure and high-temperature DAC, an intelligent high-temperature temperature controller, and a single gas film in-situ pressure control system. The new three column ultra-high voltage DAC design, combined with the use of high-temperature alloy special materials, makes this type of DAC smaller in size and more versatile in positioning range, and easier to accommodate synchrotron mounts. The DAC contains three pillars and drive screws, which provide better support stability and consistency in the drive axis, thus making the pressure loading on the diamond anvil more balanced. The outer shell of the guide column made of IN718 high-temperature alloy minimizes the probability of deformation due to column heating. When the entire DAC is assembled, the test sample is concentrated between the diamond anvil at the top and bottom, making it easy to view the sample from the top or bottom. The conical openings of the top and bottom windows are 28 °, allowing for light observation and spectral analysis.
Brief usage: The three column DAC used in the pressure controlled hydrothermal synthesis device is basically the same as the traditional DAC assembly method. The assembled DAC of the test sample is placed in the gas film sleeve of the pressure controlled hydrothermal synthesis device, in close contact with the gas film, and tightened by external threads. Connect the 1/16 inch quick connector of the diaphragm to the pipeline of the pressure control system. Connect the temperature measurement and heating cables from the DAC to the wiring terminals of the intelligent high-temperature temperature controller. This pressure controlled hydrothermal synthesis device for high temperature and high pressure testing has been assembled. The next step is to power on for pressure and temperature loading. After the testing is completed, cool down and relieve pressure, and turn off the power.
This pressure controlled hydrothermal synthesis device is compatible with multiple DAC products from our company and accepts special customization. Please consult us for details.
DAC matching gas film in-situ pressurization design:
Intelligent high-temperature temperature controller:
Product Name: Current type Intelligent Temperature Controller. Model: TCS-D-600.
This type of intelligent temperature control instrument is suitable for load heating and temperature control processes with built-in heating rings, resistance values, and ohm levels in DAC. The temperature rise and fall are intelligently controlled, and the process is linearly increased and decreased to avoid power surges and sudden drops. It is crucial for the safe and reliable use of heating processes and heating loads. This type of intelligent temperature control instrument is mainly used for high temperature testing.
Ø Technical parameters:
Working voltage: 220V;
Rated power: 600W;
Control instrument: PID self-tuning and DC power closed-loop control output form, single/multi segment independent intelligent control, programmable temperature control mode;
Usage range: RT~1200K;
Temperature measurement accuracy: 0.1 ℃, temperature stability better than ± 1 ℃;
Thermal sensor: K-even or other types can be modulated;
Temperature control display: LCD display;
Comes with upper computer software for easy computer control.
Ø Temperature controller design drawings:
Ø Heating ring design drawings:
Introduction to Single Gas Membrane In Situ Pressure Control System
The most commonly used diamond anvil press, or DAC for short, is widely recognized among high-pressure beginners and long-term users due to its small size, high ultimate pressure, and relatively complete application environment (magnetic field, temperature, shear, etc.). But even independent high-pressure tests are subject to the superposition of many factors, such as the pressurization method adopted by the operator, the inclination of the Gasget, the flatness of the cushion block, and the stress release of the anvil Our company has been committed to improving the convenient and efficient use of DAC in multiple directions. DAC has always maintained the traditional screw press method, which we call 'Screw Press'. This most direct pressurization method requires high technical skills from the operator, especially in scenarios where consistency in repeated experiments and stability in the depressurization process are important. To avoid excessive human intervention, indirect pressurization and depressurization methods can be adopted. The commonly used gas film pressurization method in high-pressure and high-temperature experiments in practical applications. The purpose of participating in this method is to achieve controllable movement between the piston and cylinder of the DAC, so as to make the pressurization and depressurization process tend towards an idealized and consistent operating state.
Single gas film in-situ pressure control system: By using an electric gas controller to regulate the internal pressure of gas films of different shapes, different deformation amounts of the gas film are generated, ultimately achieving precise electric control of pressure, thus making the pressurization depressurization process tend towards an idealized and consistent operating state.
From the form of gas film, it can be divided into single film pressure control, dual film pressure control, and integrated single film compressor. This in-situ pressure control form of gas film is suitable for various working conditions such as high temperature, room temperature, and low temperature, and is compatible with remote control. The device adopts a minimalist disassembly concept in design, which facilitates maintenance and user replacement of the press machine for adaptation.
The main indicators are as follows:
*1 single channel pace5000 host, independently controlled module pressure can reach 3000psi, which is 20MPa;
*2. Install 1 ultra high precision module for more precise control of the pressurization process. The control module has a maximum pressure limit of 3000 PSI, a pressure control rate as low as 0.002 bar/min, and a control accuracy of not less than 0.1%;
*The control module can achieve linear setting control and jog control of pressure, suitable for fast or slow loading of pressure;
*4. High resolution color touch screen operation;
*5. Intuitive icon task driven menu structure;
*6. Provide remote control software for users' automatic control using RS232, IEEE connection, Ethernet, and USB as standards;
*Equipped with diaphragm and press cover, it can adapt to conventional symmetrical DAC and high temperature and high pressure three column press, and accept customized processing services.
Common assembly forms of connection lines for in-situ pressure control systems:
*The gas source end of the gas cylinder is generally connected to the controller through a 1/16 or 1/8 high-pressure pipeline.
*Control software form of gas film upper computer:
