Changsha China Porcelain New Material Technology Co., Ltd.

详情

1. Industry Background & Technical Demand of High-Temp Sintering Consumables

Lithium iron phosphate(LFP), high-nickel ternary(NCM/NCA) cathode and artificial graphite anode all require strict high-temperature calcination ranging from 700℃ to over 3000℃ under oxidizing/reducing atmosphere during production. Traditional ordinary refractory saggers easily suffer lithium salt corrosion, thermal shock cracking, powder contamination and short service life under long-cycle alternating high-low temperature environment, which brings massive material waste and frequent production shutdown for battery factories. Meanwhile, crystalline silicon photovoltaic raw material calcination and electronic ceramic sintering also put forward ultra-high requirements on thermal stability, dimensional precision and chemical inertness of bearing fixtures.

Against such industry pain points, customized high-purity mullite, corundum and graphite composite sagger/crucible gradually replace conventional low-grade kiln furniture, becoming mainstream industrial choice. ZCXC founded in 2015 focuses on R&D and mass production of ceramic-carbon composite high-temperature consumables, with annual sales exceeding 300 million RMB and ranked top tier among domestic LIB sagger shipment volume.

2. Core Product Material Technology & Performance Parameters

ZCXC’s core product portfolio covers four major categories: mullite composite sagger, graphite sagger & large graphitized crucible, corundum refractory products and precision electronic ceramic components, matched with photovoltaic silicon carbide boat holder for silicon raw material sintering. All products are developed based on self-developed composite formulation optimized against lithium erosion mechanism.

2.1 Mullite Composite Sagger (Cathode LFP/Ternary Mainstream Carrier)

Material formulation: High-purity fused mullite + cordierite + spinel modified composite raw material; trace rare earth oxide added to suppress lithium ion penetration corrosion at high temperature;
Core technical merit: Working temperature up to 1350℃, outstanding anti-lithium salt corrosion, excellent thermal shock resistance (≥50 rapid cold-hot cycles without crack), low thermal expansion coefficient; annual designed capacity reaches 3 million units at ZCXC three production bases;
Application: Sintering of LFP, NCM523/NCM811 high-nickel ternary cathode powders under oxidizing roller kiln atmosphere, avoiding impurity doping to guarantee cathode electrochemical performance and reduce battery internal resistance.

2.2 Graphite Sagger & Large Graphitized Structural Crucible (Anode Graphitization Core Fixture)

Made from high-purity artificial graphite with carbon content ≥99.9% after precise graphitization treatment:

Graphite sagger: Max service temperature 3000℃, superior thermal conductivity, stable under inert/reducing atmosphere, perfectly fit artificial graphite anode high-temp graphitization calcination; annual output 600,000 pieces;
Large-size graphitized crucible: Customized oversized structure for ultra-large batch anode sintering, annual production capacity 50,000 units, widely adopted by leading domestic and overseas anode material manufacturers.

2.3 Corundum Refractory Sagger & Custom Ceramic Parts

High-alumina corundum base material (Al₂O₃≥99%) with compact sintered microstructure, near-zero reaction activity with lithium oxides and molten lithium salt under extreme high temperature; used for ultra-high purity lithium salt calcination and special high-corrosion electronic ceramic firing scenarios.

2.4 Electronic Ceramic & PV Silicon Carbide Boat

Electronic ceramic: Wear-resistant alumina ceramic shell, resistor housing with strict dimensional tolerance; annual output 2000 tons, applied in automotive electronics and passive component packaging;
Silicon carbide boat holder: Silicon carbide composite formulation for photovoltaic silicon powder sintering, anti-oxidation and long-cycle service for PV upstream production line.

3. ZCXC Intelligent Manufacturing & R&D Technical Advantages

3.1 Professional R&D Team & Raw Material Control

The enterprise owns 2 PhD-level inorganic material experts and 20 senior technical engineers with over 30-year experience in refractory & advanced ceramic industry, focusing on formulation upgrade against sagger corrosion failure mechanism in lithium calcination process. R&D team continuously optimizes composite powder ratio to extend product service life by 30%–60% vs ordinary market saggers, directly lowering customer’s per-unit fixture procurement cost.

3.2 Full Automatic Intelligent Production System

Full-automatic computer batching system: Precise raw material proportioning error controlled within ±0.3% to stabilize batch product consistency;
Production equipment layout: 5 intelligent automatic high-temperature kilns, 20 large-tonnage hydraulic presses, 40 automatic dry-powder forming machines realize full-process mechanization from raw material feeding, molding, high-temp sintering to finished inspection;
ISO9001:2015 certified full quality control: Every batch undergoes thermal shock test, high-temp corrosion simulation and dimensional inspection before delivery to customers.

3.3 Three-Base Production Layout Guarantee Fast Global Delivery

ZCXC builds three core production hubs: Changsha Headquarters Base, Changsha Pilot R&D Base and Hebei Huanghua Manufacturing Base, covering South China and North China core new energy industrial clusters. Multi-base layout shortens logistics cycle for domestic clients and supports bulk export to Southeast Asia, Europe and North America’s lithium battery and PV enterprises.

4. Spent Sagger & Crucible Circular Recycling Technology (Differentiated Core Technology)

Most traditional sagger manufacturers only focus on new product sales, while ZCXC deploys full industrial chain layout including waste refractory recycling and comprehensive resource utilization, a key proprietary technical advantage of the company:

4.1、Recycling process: Recycle used scrapped mullite/graphite sagger from downstream battery factories → crushing, impurity removal and component classification → refined processing into regenerated refractory raw material → re-formulated for low-to-medium grade high-temperature kiln furniture production;

4.2、Industrial value: Help battery manufacturers realize solid waste zero landfill and cut waste disposal expense, meanwhile ZCXC optimizes raw material cost to provide clients with more cost-effective new sagger products, realizing circular economy win-win between upstream and downstream industry chains.

5. Product Application Fields & Market Technical Value

5.1 Lithium Battery Industry (Core Application)

Covers full chain of cathode(LFP/NCM/LCO/LMO) and anode(natural/artificial graphite) high-temperature calcination, matching continuous roller kiln, pusher kiln and box-type high-temperature furnace of mainstream lithium material factories worldwide, effectively reduce cathode impurity pollution and improve finished battery’s cycle life and safety performance.

5.2 Photovoltaic Raw Material Production

Silicon carbide boat & customized corundum fixture applied in metallurgical grade silicon and polysilicon precursor high-temperature purification, critical to improve PV silicon raw material purity and reduce finished cell defect rate.

5.3 Advanced Electronic & Carbon Material Industry

Precision electronic ceramic components for automotive electronics, passive components; corundum refractory products for high-purity carbon fiber and advanced carbon composite sintering production.

6. Future Technical Development Trend of New Energy High-Temp Consumables

6.1 Ultra-low corrosion composite formulation: R&D of zirconia-reinforced mullite composite material to further prolong sagger service life under high-nickel cathode strong lithium erosion environment;

6.2 Coating modification technology: Inner wall anti-corrosion coating spraying for conventional mullite sagger to balance product cost and service performance;

6.3 Deep circular recycling: Upgrade waste sagger high-value recovery technology to extract lithium elements from scrapped lithium-contaminated ceramic sagger for lithium salt reproduction, further improve resource utilization rate.

ZCXC’s long-term R&D roadmap is centered on above three technical directions, continuously upgrading product iteration to adapt higher-standard sintering requirement from next-generation high-energy-density lithium battery and high-efficiency PV industry.

7. Conclusion

High-performance mullite, graphite and corundum sagger/crucible are invisible core supporting components for new energy high-temperature manufacturing, whose material technology directly determines raw material yield and finished product quality of lithium battery and photovoltaic industry. With three major production bases, mature intelligent manufacturing system, professional inorganic material R&D team and proprietary spent refractory recycling technology, Changsha Zhongci New Material (ZCXC) becomes a reliable global supplier of lithium battery & PV thermal consumables. As global new energy market keeps booming, continuous technical optimization of high-temperature kiln furniture will further drive cost reduction and quality upgrading of entire lithium-ion battery industrial chain.

Company Info: Changsha China Porcelain New Material Technology Co., Ltd | Address: No.98 Xintian North Road, Ningxiang High-tech Industrial Park, Changsha, Hunan, China | Contact: Mr. Yoon +86-13787141488, Ms. Xiao +86-15074942979 | Official Website: https://en.zcxc.cc

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