PEER-REVIEWED ARTICLE bioresources.com Yıldırım & Furkan Yıldırım (2021). “Wood-Qz composite,” BioResources 16(2), 3607-3622. 3607 Wood and Quartz Substituted Composite Material Characteristics Korkmaz Yıldırım a, * and Yüksel FurkanYıldırım b Many engineering designs focus on the production of durable, ergonomic, and economical new materials. In today's world where natural resources are rapidly decreasing, recycling waste materials is of great importance. As a result of the bending test, the sample's return to its original dimensions shows the plastic feature of the material. It was observed that the tensile strength can be increased if the speed of the injection machine is well adjusted in the production of tensile strength testing samples. There was an increase in the screw tensile strength of the samples and the joint hardness strength. Thermogravimetric analysis (TGA) showed that the reference samples were completely crumbled around 480 °C, and it was observed that only quartz remained from the input materials. Differential scanning calorimetry (DSC) showed that the peak point in the reference sample was at the heat flow rate of 29 m/W, while it was 18 to 19 m/W in the doped groups. Melting temperature was observed in the range of 125 to 135 °C in all groups. The mechanical properties of the quartz-substituted samples increased compared to the reference sample. It was observed that the quartz and wood powder contained in the mixture worked in harmony. Keywords: Quartz; Wood powder; Composite material; Bending; Injection Contact information: a: University of Aydın Adnan Menderes, Aydın Vocational School, Efeler, Aydın, Turkey; b: University of Beykent, Beykent Vocational School, Beylikdüzü, İstanbul, Turkey; *Corresponding author: korkmazy54@gmail.com INTRODUCTION Plastic composite products obtained from thermoplastic materials by various production methods in recent years have been used in many fields, such as the automotive industry, electronic home appliances, computer systems, white goods production, space technologies, and even artistic equipment. These materials can be formed easily; they are of low density compared to metals and their superior surface quality and resistance to corrosion have important effects on the tendency of interests towards plastic. In a world where limited natural resources are gradually decreasing, it is important to recycle waste materials into production. Loss and waste material arise due to the unique working and production systems of each sector. Today, with the decrease of natural resources, it is of great significance to regain waste materials by using recycling systems. A composite material contains phases that are separated from each other by their form and chemical composition and are basically insoluble in each other, such that there is a mixture or combination of two or more micro or macro components (Erol 2007). The composite material often consists of only two phases. The first phase, called the matrix, usually wraps the other phase and helps to increase the strength by providing continuity. Carbon fiber-reinforced composite materials, glass fiber-reinforced composite materials,