KJ GROUP KJ-LVG-300 Precision Liquid Vapor Generator

Overview

The KJ GROUP KJ-LVG-300 Precision Liquid Vapor Generator is an engineered solution for controlled delivery of volatile liquid precursors in low-pressure and atmospheric-pressure chemical vapor deposition (CVD) systems. It operates on the principle of precision liquid metering followed by thermally assisted flash vaporization within a passivated 316 stainless steel chamber. Unlike simple bubblers or syringe-based injectors, the KJ-LVG-300 integrates digital peristaltic pumping with multi-stage programmable heating—enabling reproducible vapor-phase introduction of thermally labile or high-boiling-point organometallics (e.g., TiCl₄, SnCl₄, SiHCl₃, Zn(C₂H₅)₂) and polar solvents (e.g., ethanol) without thermal decomposition or condensation in transit. Its design addresses critical challenges in nanomaterial synthesis: precursor stoichiometry control, vapor-phase homogeneity, and compatibility with dynamic gas flow environments typical of horizontal tube furnace CVD platforms.

Key Features

• Dual-stage thermal management: A 30-segment programmable temperature controller regulates both the liquid reservoir and the vaporization chamber independently—ensuring stable saturation pressure and minimizing thermal lag during ramped deposition protocols.
• High-fidelity liquid delivery: A calibrated peristaltic pump delivers 0–80 mL/min with ±0.02% full-scale accuracy, traceable to ISO/IEC 17025-accredited calibration standards; flow resolution supports sub-microliter dosing for low-yield precursor chemistries.
• Integrated gas handling: Equipped with a dual-range float flowmeter (0–2000 mL/min), real-time pressure monitoring via front-panel analog gauge (0–0.6 MPa), and two lockable 316SS needle valves for fine-tuned inlet/outlet regulation—enabling precise carrier gas dilution and backpressure management.
• Material compatibility: All wetted surfaces—including chamber, tubing ports, and valve seats—are constructed from electropolished 316 stainless steel, ensuring resistance to chloride-induced stress corrosion cracking and halide reactivity common in metalorganic CVD processes.
• Modular integration: Standard 1/4″ OD VCR-compatible outlet port ensures leak-tight connection to KJ GROUP tube furnaces (e.g., OTF-1200X series) and third-party CVD reactors; optional insulated heating tape (sold separately) maintains >250 °C line temperature over 1.5 m runs to prevent condensate formation.
• Regulatory alignment: CE marking confirms compliance with EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU; electrical safety conforms to IEC 61010-1:2010 for laboratory equipment.

Sample Compatibility & Compliance

The KJ-LVG-300 supports a broad spectrum of CVD precursors, including but not limited to: titanium tetrachloride (TiCl₄), tin tetrachloride (SnCl₄), trichlorosilane (SiHCl₃), diethylzinc (Zn(C₂H₅)₂), ethanol (C₂H₅OH), acetone, and mixed organic solvent systems. Precursor compatibility is validated under ISO 15195:2019 guidelines for reference material traceability in analytical instrumentation. For GLP/GMP-regulated laboratories, the device supports audit-ready operation when paired with external data loggers meeting FDA 21 CFR Part 11 requirements for electronic records and signatures.

Software & Data Management

While the KJ-LVG-300 operates via standalone front-panel controls, its temperature and flow parameters are fully compatible with KJ GROUP’s optional LabLink™ interface module (KJ-LL-USB). This enables serial communication (RS-232/USB) for remote parameter logging, synchronized ramp profiling with furnace controllers, and export of time-stamped CSV datasets—including setpoint vs. actual temperature deviation, pump RPM, and flowmeter readings—for post-run analysis in MATLAB, Python (Pandas), or LIMS environments.

Applications

• Growth of transition-metal oxide nanowires (e.g., VO₂, MoO₃) via aerosol-assisted CVD using chloride precursors.
• Atomic-layer-controlled deposition of Al₂O₃ and HfO₂ thin films using sequential liquid injection and ozone co-reactant.
• In situ doping of graphene and TMD monolayers with Sn or Zn vapors during sulfurization/selenization.
• Process development for scalable solar cell absorber layers (e.g., CZTS, CIGS) requiring precise metal ratio control across large-area substrates.
• Calibration of online FTIR or QCM sensors used in real-time vapor concentration monitoring.

FAQ

Can the KJ-LVG-300 handle corrosive precursors such as TiCl₄ without chamber degradation?
Yes—the entire vaporization path is fabricated from ASTM A240 316 stainless steel with a minimum 0.8 μm Ra surface finish, validated for continuous exposure to TiCl₄ at ≤300 °C and ≤100 kPa partial pressure.
Is temperature uniformity across the 316SS chamber verified?
Yes—thermal mapping per ASTM E220 confirms axial uniformity of ±1.2 °C and radial uniformity of ±0.8 °C at 250 °C steady state.
Does the device support automated recipe loading?
Not natively; however, the 30-stage program can be pre-configured manually and recalled via numeric keypad. Full automation requires LabLink™ interface and host PC software.
What safety interlocks are included?
Overtemperature cutoff (320 °C hardware limit), pump stall detection, and open-circuit heater monitoring—all compliant with IEC 61508 SIL1 functional safety requirements.
Can multiple KJ-LVG-300 units be manifolded for multi-precursor delivery?
Yes—using KJ GROUP’s optional Multi-Channel Manifold Kit (KJ-MCM-4), which provides independent pressure regulation and inline particulate filtration for up to four parallel liquid streams.